TW201813596A - Image generation system for implant diagnosis and generation method thereof - Google Patents

Abstract

An image generation system for implant diagnosis includes a first image information acquirement apparatus acquiring first three-dimensional (3D) image data about a mouth area of a target patient, a second image information acquirement apparatus acquiring second 3D image data by scanning plaster patterns of teeth of the target patient, and a data processing apparatus receiving and matching the first 3D image data and the second 3D image data and generating synthetic 3D image data. When a virtual fixture to be placed on the target patient is overlapped on the synthetic 3D image data, the data processing apparatus visually displays bone density around the virtual fixture based on the virtual fixture.

Description

   Image generation system and method for implant diagnosis   

The concept of the present invention relates to an image generation system and method for implant diagnosis, and more specifically, to an implant diagnosis used in the diagnosis and surgical planning of a dental implant Image generation system and its generation method.

Implant originally meant an alternative to restore damaged human tissue. However, in a dental field, the implant refers to a series of procedures for transplanting an artificial tooth.

To replace a damaged tooth root, the implant system is a series of dental procedures used to restore the function of a tooth by: placing a fixture in an alveolar bone in which one of the teeth has been damaged, and An artificial tooth is then fixed to the fixture, which is a root formed from titanium and will not have a repelling effect on the human body.

In the case of a common prosthesis or denture, the surrounding teeth or bones can be damaged over time. In contrast, the implant can be used semi-permanently because it does not damage the surrounding tooth tissue, provides the same function and shape as a natural tooth, and has no caries.

In an artificial tooth surgery (referred to as an implant or an implant surgery), an implant hole is formed by using a drill (the drill is different according to the type of a jig), and the jig is placed in The alveolar bone is osseointegrated with the bone, and a table is coupled to the fixture and crowned with a final prosthesis.

The above implant can facilitate the restoration of a single missing tooth, enhance the function of one denture for partially toothless and completely toothless patients, improve the aesthetic appearance of dental prosthesis restoration, and further spread to be applied to the surrounding support Excessive stress on bone tissue stabilizes a row of teeth.

Dental implants can usually include: a fixture that is placed as an artificial tooth root; an abutment, coupled to the fixture; a set of screws to fix the abutment to the fixture; and an artificial The tooth is coupled to the abutment. Before coupling the abutment to the jig, that is, during a period of osseointegration of the jig bone into the alveolar bone, the abutment is coupled to the jig and a coupled state is maintained.

The jig, which is one of the components of a dental implant, is placed in a drill hole formed in the alveolar bone by using a drill and serves as part of an artificial tooth root. Therefore, the jig is firmly placed in the alveolar bone.

The placement of an implant varies greatly from patient to patient, because the placement of an implant is based on, for example, the state of the teeth of a patient, the position of a tooth that requires an implant surgery, or the alveolar bone of a patient One state is determined by various factors.

Specifically, when placing an implant, the bone density of the alveolar bone is an extremely important factor, and the placement position, placement depth, and placement direction of an implant are carefully based on the state of the bone density of a patient determine.

As mentioned above, traditionally, since the placement of an implant varies greatly from patient to patient, an implant diagnostic system has been developed that assists doctors in accurately identifying such differences and formulating a simulated surgery and surgery Surgery plan.

The conventional image generation system for implant diagnosis uses computed tomography (CT) to visually display a mouth area of a patient to facilitate a simulated surgical operation. However, the conventional image generation system for implant diagnosis has one of the following problems: the bone density of an alveolar bone (which is extremely important for determining the placement position, placement depth and placement direction of an implant) is inaccurate It will be displayed in a state that is not recognized by the doctor.

Specifically, since the traditional image generation system for implant diagnosis only displays the bone density of an alveolar bone with a single-color brightness, it may be difficult for a doctor to quickly identify the bone density of an alveolar bone . In addition, since the traditional image generation system for implant diagnosis only displays the overall bone density of the alveolar bone, it does not individually provide the bone density of the virtual position where an implant is to be placed, so that the doctor can recognize a most The time for the placement of the good plant is extended.

[Previous Technical Document]

Korean Patent Application Publication No. 10-2010-0133921 (December 22, 2010)

The concept of the present invention provides an image generation system for implant diagnosis and a method for generating the same. The image generation system for implant diagnosis can visually display one of the positions around which the fixture is to be placed based on a fixture Alveolar bone density.

According to one aspect of the concept of the present invention, there is provided an image generation system for implant diagnosis, which includes: a first image information acquisition device (first image information acquisition apparatus) for acquiring a mouth of a target patient One of the first three-dimensional (3D) image data of a region; a second image information acquisition device for acquiring a plurality of plaster patterns of teeth of the target patient by scanning A second three-dimensional image data; and a data processing device for receiving the first three-dimensional image data and the second three-dimensional image data, and the first three-dimensional image data and the second three-dimensional image data Matching and generating a synthetic 3D image data (synthetic 3D image data), wherein when a virtual fixture (virtual fixture) to be placed on the target patient overlaps the synthetic 3D image data, the data The processing device visually displays the bone density around the virtual fixture based on the virtual fixture.

The data processing device can visually display the bone density of an area in contact with an outer contour of the virtual fixture.

The bone density around the virtual fixture can be displayed in a different color according to a value of the bone density.

The color can be a color.

The dental plaster models may be provided with a matching reference marker for matching the first three-dimensional image data with the second three-dimensional image data.

The matching reference marks may be provided in a plural form, and the matching reference marks may be arranged to be spaced apart from each other.

The data processing device may include: an input unit for receiving information from a user; an operation unit (operation unit) for generating the synthesized three-dimensional image data, electrically connected to the input unit, and based on The information input by the user is used to correct the synthetic three-dimensional image data; and a display unit is electrically connected to the operation unit and is used to visually display the synthetic three-dimensional image data and the bone density around the virtual fixture.

The data processing device can generate the synthesized three-dimensional image data by performing a pre-matching operation and then performing an exact matching operation, the pre-matching operation is based on the coordinates of the matching reference mark in the second three-dimensional image data The first three-dimensional image data and the second three-dimensional image data are pre-matched. The precise matching operation is to pre-match the synthesized three-dimensional image data with the second three-dimensional image data and the first A three-dimensional image data is accurately matched.

In the pre-matching operation, the operation unit may divide one display area of the display unit into a teeth area display zone, a second 3D image data display zone, And a synthetic 3D image data display zone, in the tooth area display area, a tooth area of the target patient in the first three-dimensional image data is visually displayed in the second three-dimensional In the image data display area, the second three-dimensional image data is displayed visually, and in the synthesized three-dimensional image data display area, the synthesized three-dimensional image data is visually displayed; in the second three-dimensional image via the input unit Receiving an input of the coordinate of the matching reference mark in the data display area; receiving an input of a virtual coordinate corresponding to the coordinate of the matching reference mark in the tooth area display area through the input unit; and by The coordinate of the input matching reference mark G2 is matched with the input virtual coordinate to display the pre-matched synthetic three-dimensional image data in the synthetic three-dimensional image data display area.

In the exact matching operation, the operation unit may divide the display area of the display unit into a plurality of divided zones, and arrange a plurality of different planar images of the pre-matched synthetic three-dimensional image data In the divided areas, and an input of a matching state of the second three-dimensional image data and the first three-dimensional image data in each of the divided areas received through the input unit.

The divided areas may include: a first area in which the pre-matched synthetic three-dimensional map is displayed by cutting along a first axis and a second axis crossing the first axis A flat image obtained from the image data; a second area in which the display is displayed in the first area by a third axis along the second axis and a third axis crossing the second axis A plane image is obtained by cutting the pre-matched synthetic three-dimensional image data at a position of a first moving point; a third area, in the third area, displayed by moving along the first axis And the third axis cuts a plane image obtained by pre-matching the synthesized three-dimensional image data at the position of the first movement point displayed in the first area; a fourth area, in the In the fourth area, the display is obtained by cutting the pre-matched synthesized three-dimensional image data along the second axis and the third axis at a position of a second moving point displayed in the first area A planar image; a fifth area, in which the display is made by cutting along the first axis and the third axis at the position of the second movement point displayed in the first area A plane image is obtained by cutting the pre-matched synthetic three-dimensional image data; and a sixth area, in which the display is performed in the first by along the second axis and the third axis A planar image is obtained by cutting the pre-matched synthetic three-dimensional image data at a position where a third moving point is displayed in the area.

The first moving point to the third moving point can be moved by an operation of the user, the image of the second area and the image of the third area move with one of the first moving point Related changes, the image of the fourth area and the image of the fifth area change in relation to the movement of one of the second movement points, and the image of the sixth area and the third movement One of the points moves related changes.

According to one aspect of the concept of the present invention, a method for generating an image for implant diagnosis is provided, which includes: a first image information acquisition operation, that is, acquiring a first part of a mouth area of a target patient A three-dimensional image data; a second image information acquisition operation, that is, acquiring a second three-dimensional image data by scanning a plurality of dental plaster models of the target patient; a synthetic three-dimensional image data acquisition operation, namely Generating a synthetic three-dimensional image data by matching the first three-dimensional image data and the second three-dimensional image data; and by overlapping the virtual fixture to be placed on the target patient with the synthetic Based on the virtual jig, the three-dimensional image data visually displays the bone density around the virtual jig.

In the step of visually displaying the bone density, the bone density of an area in contact with an outer contour of the virtual fixture can be visually displayed.

The bone density around the virtual fixture can be displayed in a different color according to a value of the bone density.

The color can be a color.

The second image information acquisition operation may include: generating a dental plaster model of the target patient; providing the first three-dimensional image data and the second three-dimensional image data on the dental plaster models of the target patient Perform matching one of the matching reference marks; and scan the dental plaster models of the target patient.

The matching reference marks may be provided in a plural form, and the matching reference marks may be arranged to be spaced apart from each other.

The synthetic three-dimensional image data acquisition operation may include a pre-matching operation, that is, based on a coordinate of the matching reference mark in the second three-dimensional image data, the first three-dimensional image data and the second three-dimensional image data Pre-matching; and an exact matching operation, that is, accurately matching the second three-dimensional image data with the first three-dimensional image data in the pre-matched synthetic three-dimensional image data.

The pre-matching operation may include: dividing a display area of the display unit into a tooth area display area, a second 3D image data display area, and a synthesized 3D image data display area. In the tooth area display area, visual To display the tooth area of the target patient in the first three-dimensional image data, visually display the second three-dimensional image data in the second three-dimensional image data display area, and in the synthetic three-dimensional image data display area , Visually displaying the synthesized three-dimensional image data; receiving one of the coordinates of the matching reference mark in the second three-dimensional image data display area; receiving the matching reference mark in the tooth area display area The coordinate corresponds to an input of a virtual coordinate; and by matching the input coordinate of the matching reference mark G2 with the input virtual coordinate, the pre-displayed in the synthesized three-dimensional image data display area Match the synthesized 3D image data.

The exact matching operation may include: dividing the display area of the display unit into a plurality of divided areas, and arranging a plurality of different planar images of the pre-matched synthetic three-dimensional image data in the divided areas And performing correction so that in each of the divided areas, the second three-dimensional image data and the first three-dimensional image data are matched.

The divided areas may include: a first area in which the pre-matched synthetic three-dimensional map is displayed by cutting along a first axis and a second axis crossing the first axis A flat image obtained from the image data; a second area in which the display is displayed in the first area by a third axis along the second axis and a third axis crossing the second axis A plane image is obtained by cutting the pre-matched synthetic three-dimensional image data at a position of a first moving point; a third area, in the third area, displayed by moving along the first axis And the third axis cuts a plane image obtained by pre-matching the synthesized three-dimensional image data at the position of the first movement point displayed in the first area; a fourth area, in the In the fourth area, the display is obtained by cutting the pre-matched synthesized three-dimensional image data along the second axis and the third axis at a position of a second moving point displayed in the first area One plane image; a fifth area, in this fifth area, display Shows a planar image obtained by cutting the pre-matched synthetic three-dimensional image data at the position of the second movement point displayed in the first area along the first axis and the third axis And a sixth area in which the display is pre-matched by cutting along a position along a second axis and the third axis at a position of a third movement point displayed in the first area A three-dimensional image is obtained by synthesizing three-dimensional image data.

The first moving point to the third moving point can be moved by an operation of the user, the image of the second area and the image of the third area move with one of the first moving point Related changes, the image of the fourth area and the image of the fifth area change in relation to the movement of one of the second movement points, and the image of the sixth area and the third movement One of the points moves related changes.

110‧‧‧First image information acquisition device

120‧‧‧Second image information acquisition device

130‧‧‧Data processing device

131‧‧‧ input unit

132‧‧‧Operation unit

133‧‧‧Display unit

D1‧‧‧The first divided area

D2‧‧‧Second divided area

D3‧‧‧The third divided area

D4‧‧‧The fourth divided area

D5‧‧‧The fifth divided area

D6‧‧‧The sixth divided area

G‧‧‧Dental plaster cast

G1‧‧‧Dental plaster model body

G2‧‧‧ matching reference mark

M1‧‧‧ First moving point

M2‧‧‧second moving point

M3‧‧‧ third moving point

P‧‧‧Virtual fixture

S‧‧‧Scale Control Department

S110‧‧‧ First image information acquisition operation

S120‧‧‧Second image information acquisition operation

S130‧‧‧synthesis 3D image data acquisition operation

S131‧‧‧Prematch operation

S132‧‧‧Exact match operation

S140‧‧‧Bone density display operation

Z1‧‧‧Dental area display area

Z2‧‧‧The second three-dimensional image data display area

Z3‧‧‧Synthesized 3D image data display area

By reading the following detailed description in conjunction with the accompanying drawings, an exemplary embodiment of the inventive concept will be more clearly understood, in which: FIG. 1 illustrates an image generation system for implant diagnosis according to an embodiment; FIG. 2 illustrates The tooth plaster model shown in Figure 1; Figures 3 and 4 are images of the bone density around a virtual fixture visually displayed on one of the display units shown in Figure 1; Figure 5 is based on Figure 1 is a flow chart of a method for generating an image for implant diagnosis using the image generation system for implant diagnosis; Figures 6 and 7 are synthetic three-dimensional images shown in Figure 5 Like one of the data acquisition operations, the image of the display unit in the pre-matching operation; and Figures 8 and 9 are the precise matching operation of the display unit in one of the precise matching operations of the synthetic three-dimensional image data acquisition operation shown in Figure 5. image.

Reference is made to the accompanying drawings that illustrate exemplary embodiments of the inventive concept for a full understanding of the inventive concept and one of its advantages.

Hereinafter, the inventive concept will be explained in detail by explaining exemplary embodiments of the inventive concept with reference to the drawings. In the drawings, the same reference numbers indicate the same elements.

In the following description, a first axis, a second axis, and a third axis represent an X axis, a Y axis, and a Z axis, respectively.

Figure 1 illustrates an image generation system for implant diagnosis according to an embodiment. Figure 2 illustrates the dental plaster model shown in Figure 1. Figures 3 and 4 are images of bone density around a virtual jig visually displayed on a display unit shown in Figure 1.

As shown in FIGS. 1 to 4, the image generation system for implant diagnosis according to this embodiment may include: a first image information acquisition device 110 for acquiring a mouth of a target patient A first three-dimensional (3D) image data of one of the regions; a second image information acquisition device 120 for obtaining a second three-dimensional image data by scanning the tooth plaster model G of the target patient; and a data The processing device 130 is configured to receive the first three-dimensional image data and the second three-dimensional image data and match the first three-dimensional image data with the second three-dimensional image data to generate a synthetic three-dimensional image data.

The first image information acquisition device 110 acquires first three-dimensional image data about the mouth area of the target patient. The first image information acquisition device 110 of this embodiment may include computed tomography (CT), and the first three-dimensional image data of this embodiment is represented by using a plurality of sectional images (sectional image) While implementing a three-dimensional image, the concept of the present invention is not limited to this, and various imaging devices (such as a magnetic resonance imaging apparatus) can be used as the first image information acquisition device in this embodiment 110.

The second image information acquisition device 120 acquires the second three-dimensional image data by scanning the tooth plaster model G of the target patient.

The dental plaster model G of this embodiment is formed into a shape of the teeth and gums of the target patient. After inserting a tray with an impression material into the target patient's mouth, the target patient's teeth are pressed against the impression material, and thus a dental plaster model G is made in the shape of one of the pressed teeth and surrounding gums .

The dental plaster model G of this embodiment is provided with a matching reference mark G2 for matching the first three-dimensional image data with the second three-dimensional image data.

When matching the first three-dimensional image data with the second three-dimensional image data, the matching reference mark G2 is used as a reference coordinate. The matching reference mark G2 may be performed in the data processing device 130 by matching a coordinate of the matching reference mark G2 in the second three-dimensional image data with a coordinate of a virtual position corresponding to the matching reference mark G2 in the first three-dimensional image data Used when matching to generate synthetic 3D image data.

The matching reference marks G2 of this embodiment are provided in a plural form, and the matching reference marks G2 are arranged to be spaced apart from each other. In the present embodiment, at least three matching reference marks G2 are provided, and the at least three matching reference marks G2 are arranged to be spaced apart from each other.

In the second three-dimensional image data, the matching reference mark G2 is formed as a structure or material different from the tooth plaster model main body G1.

The second image information acquiring device 120 may include a three-dimensional scanner (not shown in the figure) to acquire the second three-dimensional image data by scanning the dental plaster model G. The second three-dimensional image data in this embodiment may include stereolithography (STL) data. The stereolithography data can be in an ASCII or binary format, and a plurality of polygons are used to represent a surface of a three-dimensional structure in a three-dimensional program, so that the modeling data of the three-dimensional structure will be of a different type Three-dimensional programs are easy to recognize.

The data processing device 130 receives the first three-dimensional image data and the second three-dimensional image data and matches the first three-dimensional image data with the second three-dimensional image data, thereby generating synthetic three-dimensional image data.

The data processing device 130 may include: an input unit 131 for receiving an input of information from a user; and an operation unit 132 for receiving the first 3D image data and the second 3D image data and generating a synthesized 3D Image data; and a display unit 133, which is electrically connected to the operation unit 132 and visually displays the synthesized three-dimensional image data.

The input unit 131 is electrically connected to the operation unit 132, and receives input of one of the control information from the user and transmits the received information to the operation unit 132.

The operation unit 132 receives the first three-dimensional image data and the second three-dimensional image data, generates synthetic three-dimensional image data, and visually displays the generated data on the display unit 133.

In other words, the synthesized three-dimensional image data is generated by systematic interaction in the input unit 131, the display unit 133, and the operation unit 132.

The generation of synthetic three-dimensional image data has now been briefly explained, and this will be explained in detail later.

The first three-dimensional image data acquired from the first image information acquisition device 110 (such as a computer tomography device) has an advantage that enables accurate recognition of a bone shape of a target patient. However, various shapes of prostheses and implants provided in the mouth of the target patient may distort an image.

Therefore, the synthesized three-dimensional image data in which the second three-dimensional image data overlaps with the first three-dimensional image data is generated, the second three-dimensional image data contains extremely accurate information about the internal structure of the target patient's mouth and is Acquired by scanning the tooth gypsum model G of the target patient, the first three-dimensional image data contains accurate information about the bone shape of the target patient. An operation of matching the first three-dimensional image data and the second three-dimensional image data is required to overlap the first three-dimensional image data and the second three-dimensional image data.

The operation of matching the first three-dimensional image data with the second three-dimensional image data may include: a pre-matching operation, which is to match the first three-dimensional image data with the coordinates of the reference mark G2 in the second three-dimensional image data Pre-matching the second three-dimensional image data; and an exact matching operation, that is, accurately matching the second three-dimensional image data with the first three-dimensional image data in the pre-matched synthetic three-dimensional image data.

The pre-matching operation is a method for matching the first three-dimensional image data with the second three-dimensional image data substantially quickly. In the pre-matching operation, the first three-dimensional image data and the second three-dimensional image data are pre-matched based on the coordinates of the matching reference mark G2 in the second three-dimensional image data.

In the pre-matching operation, a screen is provided to the user as shown in FIGS. 6 and 7 by the screen of the display unit 133. The screen may include: a tooth area display zone Z1, in which the tooth area of the target patient in the first three-dimensional image data is visually displayed; a second three-dimensional image data display zone Z2, in the first The second three-dimensional image data display area Z2 visually displays the second three-dimensional image data; and a synthetic three-dimensional image data display area Z3 in the synthetic three-dimensional image data display area Z3 visually displays the synthetic three-dimensional image data .

The tooth area of the target patient in the first three-dimensional image data is visually displayed in the tooth area display zone Z1. The user can select the tooth area of the target patient in the first three-dimensional image data visually displayed in the tooth area display zone Z1 through the input unit 131 and a control signal.

In addition, the second three-dimensional image data is visually displayed in the second three-dimensional image data display zone Z2. The synthetic three-dimensional image data is visually displayed in the synthetic three-dimensional image data display area Z3.

On one screen of the display unit 133 shown in FIG. 6, the user inputs the coordinates matching the reference mark G2 to the operation unit 132 in the second three-dimensional image data display zone Z2. In other words, when the user clicks on the three matching reference marks G2 displayed in the second three-dimensional image data display zone Z2 via the input unit 131 (for example, a mouse, etc.), one of the clicked coordinates is transferred to the operation Unit 132.

Subsequently, the user inputs a virtual coordinate corresponding to the coordinate of the matching reference mark G2 in the tooth area display zone Z1 to the operation unit 132. In other words, when the user compares an image of a tooth area displayed in the tooth area display area Z1 with an image of the tooth plaster model G displayed in the second three-dimensional image data display area Z2 and clicks When a virtual position corresponding to a matching reference mark G2 is selected in an image of a tooth area displayed in the tooth area display zone Z1, the clicked coordinate is transmitted to the operation unit 132.

Then, the operation unit 132 compares the input coordinates of the matching reference mark G2 with the input virtual coordinates, overlaps the first 3D image data and the second 3D image data, and displays them in the synthesized 3D image data display area The pre-matched synthetic three-dimensional image data obtained by overlapping the first three-dimensional image data and the second three-dimensional image data is displayed in Z3.

Although the synthetic three-dimensional image data display area Z3 shown in FIG. 6 displays only the first three-dimensional image data because the user ’s input to a target is not performed, the synthetic three-dimensional image data display area Z3 shown in FIG. 7 displays Wherein, the coordinates of the matching reference mark G2 and the virtual coordinates corresponding to the coordinates of the matching reference mark G2 are input to synthesize the three-dimensional image data by pre-matching the second three-dimensional image data and the first three-dimensional image data.

Since the pre-matching operation is that the user compares the image of the tooth area display area Z1 with the image of the second three-dimensional image data display area Z2 and clicks on the image of the tooth area display area Z1 corresponding to the matching reference mark G2 Is executed at a virtual position, so although the degree of matching of the pre-matched synthetic 3D image data is not in a perfect state, the pre-matched synthetic 3D image data is in a Almost matches the state.

Therefore, in the exact matching operation, in the pre-matched synthesized three-dimensional image data in an almost matched state, the second three-dimensional image data and the first three-dimensional image data are accurately matched.

In the exact matching operation, a screen as shown in FIGS. 8 to 9 is provided on the screen of the display unit 133 for the user. In other words, in the exact matching operation, a plurality of divided areas D1, D2, D3, D4, D5, and D6 are displayed on the screen provided to the user via the display unit 133. The different planar images of the pre-matched synthesized three-dimensional image data are arranged in the divided areas D1, D2, D3, D4, D5, and D6.

In this state, the planar image of the pre-matched synthesized three-dimensional image data displayed in the divided areas D1, D2, D3, D4, D5, and D6 can be based on the first three-dimensional image data and the second three-dimensional image The data is distinguished (for example, the profile of the first three-dimensional image data and the profile of the second three-dimensional image data are displayed in different colors) so that the user can visually recognize whether the data is matched.

As shown in FIG. 8 or FIG. 9, in the exact matching operation of this embodiment, one of the display areas of the screen provided to the user via the display unit 133 is divided into the first divided area to the sixth divided area D1, D2, D3, D4, D5 and D6.

The first divided area D1 is a plane of the pre-matched synthesized three-dimensional image data and corresponds to a user's operation screen. In this embodiment, the first divided area D1 displays an image formed by cutting the pre-matched synthetic three-dimensional image data by an X-Y axis plane.

Three moving points M1, M2, and M3 are displayed in the first divided area D1. When the user moves an input point via the input unit 131 (eg, a mouse, etc.), the images of the second to sixth divided regions D2, D3, D4, D5, and D6 are changed.

The second divided area D2 displays an image cut by a Y-Z axis plane at the position of the first moving point M1 of the first divided area D1. The third divided area D3 displays an image formed by cutting an X-Z axis plane at the position of the first moving point M1 of the first divided area D1.

As the first moving point M1 of the first divided area D1 moves, the image of the second divided area D2 and the image of the third divided area D3 are changed to the position of the moved first moving point M1 Flat image.

The fourth divided area D4 shows an image cut by the Y-Z axis plane at the second moving point M2 of the first divided area D1. The fifth divided area D5 shows an image cut by the X-Z axis plane at the position of the second moving point M2 of the first divided area D1.

As the second moving point M2 of the first divided area D1 moves, the image of the fourth divided area D4 and the image of the fifth divided area D5 are changed to the position of the moved second moving point M2 Flat image.

The sixth divided area D6 shows an image cut by the Y-Z axis plane at the position of the third moving point M3 of the first divided area D1. As the third moving point M3 of the first divided area D1 moves, the image of the sixth divided area D6 is changed to a plane image at the position of the moved third moving point M3.

In the comparison between Figure 8 and Figure 9, it can be seen that the images of the second divided area to the sixth divided area D2, D3, D4, D5, and D6 will move according to the first moving point to the third The positions of points M1, M2 and M3 change and change.

The images of the second divided area to the sixth divided area D2, D3, D4, D5, and D6 are affected by the user's operation via the input unit 131. In other words, the image of the position and posture of the second three-dimensional image data displayed in the second divided area to the sixth divided area D2, D3, D4, D5, and D6 can be changed by the user's operation.

Therefore, when moving the first to third movement points M1, M2, and M3, the user checks the first three-dimensional image data and the multiple positions in the planar image of the pre-matched synthetic three-dimensional image data. Whether the second three-dimensional image data match each other. Subsequently, the user moves the second three-dimensional image data relative to the first three-dimensional image data via the input unit 131 to accurately match the first three-dimensional image data and the second three-dimensional image data.

As described above, since the outlines of the planar images displayed in the first divided area to the sixth divided area D1, D2, D3, D4, D5, and D6 are expressed in different colors, so that the first three-dimensional The image data can be distinguished from the second three-dimensional image data, so the user can select the first three-dimensional image data through the input unit 131 (such as a mouse) and then drag the selected data to The three-dimensional image data and the second three-dimensional image data are accurately matched.

Information regarding an exact matching state in which the user accurately matches an image of the second three-dimensional image data with an image of the first three-dimensional image data by using the input unit 131 is input to the operation unit 132. The operation unit 132 generates the accurately matched synthetic three-dimensional image data by correcting the pre-matched synthetic three-dimensional image data based on the information about an exact matching state input from the input unit 131.

After generating the accurately matched synthetic three-dimensional image data, the operation unit 132 overlaps the second three-dimensional image data on the first three-dimensional image data, and replaces the first three-dimensional image data with the second three-dimensional image data Corresponds to a part of the second 3D image data, thereby generating the final synthesized 3D image data.

When the generation of the synthesized three-dimensional image data is completed, a position of a jig P to be placed on a target patient is determined according to the synthesized three-dimensional image data. In this state, the user determines the position of the jig P by overlapping the virtual jig P to be placed on the target patient at various positions of the synthesized three-dimensional image data displayed on the display unit 133.

When the virtual jig P to be placed on the target patient overlaps with the synthesized three-dimensional image data, the data processing device 130 of this embodiment visually displays the bone density around the virtual jig P relative to the virtual jig P.

In other words, in this embodiment, when the virtual jig P to be placed on the target patient overlaps with the synthesized three-dimensional image data, the operation unit 132 calculates the bone density around the virtual jig P relative to the virtual jig P.

In this embodiment, the bone density around the virtual fixture P refers to the bone density in a region that is in contact with the outer contour of the virtual fixture P, that is, the portion of the part of the fixture P where the thread profile of the fixture P is located Bone density.

The display unit 133 is electrically connected to the operation unit 132, and visually displays synthesized three-dimensional image data, for example, in the form of a two-dimensional (2D) planar image and a three-dimensional image. The display unit 133 can display not only the synthesized three-dimensional image data but also the first three-dimensional image data and the second three-dimensional image data as a visual image.

In addition, the display unit 133 of the present embodiment visually displays the bone density around the virtual jig P calculated in the operation unit 132 based on the virtual jig P.

In other words, as shown in FIGS. 3 and 4, the display unit 133 visually displays the bone density of a region in contact with the contour outside the virtual jig P calculated in the operation unit 132. In this embodiment, the bone density around the virtual jig P displayed on the display unit 133 may be displayed in different colors according to a value of the bone density.

In addition, in this embodiment, the color displayed on the display unit 133 according to the value of the bone density is a color color. Therefore, in the image generation system for implant diagnosis of this embodiment, since the bone density around the virtual fixture P is displayed in different color colors according to the value of the bone density, the user can intuitively recognize the virtual Bone density around fixture P.

In this embodiment, a high bone mineral density value is displayed in yellow or green, and a low bone mineral density value is displayed in red or blue, however, the present invention is not limited to this, and the bone mineral density value may be various The color to display.

Hereinafter, referring to FIGS. 1 to 9 (mainly referring to FIGS. 5 to 9), an image generation system for implant diagnosis according to this embodiment is described to generate an image for implant diagnosis. method.

FIG. 5 is a flowchart of a method for generating an image for implant diagnosis according to the image generating system for implant diagnosis shown in FIG. 1. Figures 6 and 7 are images of the display unit 133 in one of the pre-matching operations of the synthetic three-dimensional image data acquisition operation shown in Figure 5. Figures 8 and 9 are images of the display unit 133 in one of the precise matching operations of the synthetic three-dimensional image data acquisition operation shown in Figure 5.

As shown in FIG. 5, the method for generating an image for implant diagnosis according to this embodiment may include: a first image information acquisition operation S110, that is, acquiring a first three-dimensional image about the mouth area of the target patient Image data; a second image information acquisition operation S120, that is, acquiring the second three-dimensional image data by scanning the target patient's dental plaster model G; a synthetic three-dimensional image data acquisition operation S130, that is, by applying The first three-dimensional image data is matched with the second three-dimensional image data to generate synthetic three-dimensional image data; and a bone density display operation S140, that is, when the synthetic three-dimensional image data and the virtual fixture P to be placed on the target patient are intersected When stacked, the bone density around the virtual jig P is visually displayed based on the virtual jig P.

In the first image information acquisition operation S110, the first three-dimensional image data about the mouth area of the target patient is acquired. In the first image information acquisition operation S110, as shown in FIG. 1, the first image information acquisition device 110 acquires an image of a mouth area of a target patient to acquire first three-dimensional image data.

In the second image information acquisition operation S120, the second image information acquisition device 120 scans the tooth gypsum model G of the target patient to acquire second three-dimensional image data.

In detail, the second image information acquisition operation S120 of this embodiment may include generating a dental gypsum model G of the target patient, providing a matching reference mark G2 on the dental gypsum model G of the target patient, and providing the matching reference mark G2 The dental plaster model G is scanned.

In the step of providing the matching reference mark G2, the matching reference mark G2 for matching the second three-dimensional image data with the tooth gypsum model body G1 of the target patient created when the tooth gypsum model G is generated is formed.

In the synthetic three-dimensional image data acquisition operation S130, the matching reference mark G2 provided on the dental plaster model main body G1 is used as a reference coordinate for matching the first three-dimensional image data with the second three-dimensional image data.

In the synthetic three-dimensional image data acquisition operation S130, the synthetic three-dimensional image data is generated by matching the first three-dimensional image data and the second three-dimensional image data.

The first three-dimensional image data acquired from the first image information acquisition device 110 (such as a computer tomography device) may have the following problems compared with the advantage of enabling accurate identification of the bone shape of the target patient: Various shapes of prostheses and implants provided in the mouth may distort an image.

Therefore, in the synthetic three-dimensional image data acquisition operation S130, synthetic three-dimensional image data in which the second three-dimensional image data and the first three-dimensional image data are overlapped is generated, and the execution is essentially to make the first three-dimensional image data Matching operation performed by overlapping with the second three-dimensional image data, which contains extremely accurate information about the internal structure of the target patient's mouth and is scanned by the dental gypsum model G of the target patient Obtained, the first three-dimensional image data contains accurate information about the bone shape of the target patient.

The synthetic three-dimensional image data obtaining operation S130 may include: a pre-matching operation S131, that is, pre-matching the first three-dimensional image data and the second three-dimensional image data based on the coordinates of the matching reference mark G2 in the second three-dimensional image data And an exact matching operation S132, that is, accurately matching the second three-dimensional image data with the first three-dimensional image data in the pre-matched synthesized three-dimensional image data.

The pre-matching operation S131 is a method for matching the first three-dimensional image data with the second three-dimensional image data substantially quickly. In the pre-matching operation S131, the first three-dimensional image data and the second three-dimensional image data are pre-matched based on the coordinates of the matching reference mark G2 in the second three-dimensional image data.

The pre-matching operation S131 may include: dividing one display area of the screen provided for the user into the tooth area display area Z1, the second three-dimensional image data display area Z2, and the synthesized three-dimensional image data display area Z3, and displaying in the tooth area In the zone Z1, the tooth area of one of the target patients in the first three-dimensional image data is visually displayed, and in the second three-dimensional image data display zone Z2, the second three-dimensional image data is visually displayed and the synthetic three-dimensional image data is displayed. In zone Z3, the synthetic three-dimensional image data is visually displayed; a reference mark coordinate input operation, that is, a coordinate matching the reference mark G2 is input in the second three-dimensional image data display zone Z2; a virtual coordinate input operation, that is, in the tooth area Enter the virtual coordinates corresponding to the coordinates of the matching reference mark G2 in the display area Z1; and display them in the synthetic three-dimensional image data display area Z3 by matching the entered coordinates of the matching reference mark G2 and the entered virtual coordinates Synthesized 3D image data after pre-matching.

The pre-matching operation S131 will be explained below with reference to FIGS. 6 and 7. As shown in FIG. 6, the display area of a screen provided to the user via the display unit 133 is divided into: the tooth area display zone Z1, and in the tooth area display zone Z1, the first three-dimensional image data The tooth area of the target patient; the second 3D image data display area Z2, where the second 3D image data is visually displayed in the second 3D image data display area Z2; In the three-dimensional image data display area Z3, the synthetic three-dimensional image data is visually displayed.

In the tooth area display zone Z1, the tooth area of the target patient in the first three-dimensional image data is visually displayed. The tooth area of the target patient displayed in the tooth area display zone Z1 may be selected according to the control signal input by the user through the input unit 131.

In addition, the second three-dimensional image data is visually displayed in the second three-dimensional image data display area Z2, and the synthesized three-dimensional image data is visually displayed in the synthesized three-dimensional image data display area Z3.

Both the tooth area of the target patient displayed in the tooth area display zone Z1 and the second three-dimensional image data displayed in the second three-dimensional image data display zone Z2 indicate the structure of the mouth area of a target patient. As described above, since the second 3D image data has more accurate information about the structure of the target patient's mouth area, when generating the synthesized 3D image data, the structure of the target patient's mouth area in the first 3D image data It is replaced with the second three-dimensional image data. For this replacement, the first three-dimensional image data and the second three-dimensional image data are matched with each other through the reference mark coordinate input operation and the virtual coordinate input operation.

In the reference mark coordinate input operation, the coordinates matching the reference mark G2 are input in the second three-dimensional image data display area Z2. In other words, when the user clicks the three matching reference marks G2 displayed in the second three-dimensional image data display zone Z2 by using the input unit 131 (for example, a mouse, etc.), the clicked coordinate is transmitted to Operation unit 132.

In the virtual coordinate input operation, a virtual coordinate corresponding to the coordinate of the matching reference mark G2 is input in the tooth area display zone Z1. In other words, when the user compares an image of the tooth area displayed in the tooth area display area Z1 with an image of the tooth plaster model G displayed in the second three-dimensional image data display area Z2, and then When a virtual position corresponding to the position of the matching reference mark G2 on the image of the tooth area displayed in the tooth area display zone Z1 is clicked, the clicked coordinate is transmitted to the operation unit 132.

Subsequently, in the step of displaying the pre-matched synthesized three-dimensional image data, the coordinates and virtual coordinates of the matching reference mark G2 input to the operation unit 132 are compared with each other, so that the first three-dimensional image data and the second three-dimensional image The image data overlaps, and thus the pre-matched synthesized 3D image data obtained by overlapping the second 3D image data to the first 3D image data is displayed in the synthesized 3D image data display area Z3.

It can be seen that although the reference mark coordinate input operation and the virtual coordinate input operation have not been performed, only the first three-dimensional image data is displayed in the synthetic three-dimensional image data display area Z3 shown in FIG. 6, however, the reference mark coordinate input When the operation and the virtual coordinate input operation have been performed, the synthesized 3D image data in which the second 3D image data overlaps the first 3D image data is displayed in the synthesized 3D image data display area Z3 shown in FIG. 7 One image.

In the above-mentioned virtual coordinate input operation of the pre-matching operation S131, since the user compares the image of the tooth area display zone Z1 with the image of the second three-dimensional image data display zone Z2, and clicks on the tooth area display zone Z1 The virtual position of the reference mark G2 is matched on the image, so although the matching degree of one of the synthesized three-dimensional image data pre-matched after the pre-matching operation S131 is not in a complete state, the synthesized three-dimensional pre-matched after the pre-matching operation S131 The image data is in an almost matched state.

Therefore, in the exact matching operation S132, the second three-dimensional image data and the first three-dimensional image data are accurately matched in the pre-matched synthesized three-dimensional image data having an almost matched state.

The exact matching operation S132 may include dividing the display area of the screen provided to the user through the display unit 133 into a plurality of divided areas, and arranging the different planar images of the pre-matched synthesized three-dimensional image data in the divided areas An operation in the area, and an operation to perform correction in each of the divided areas so that the second three-dimensional image data and the first three-dimensional image data are matched.

As shown in FIG. 8 or FIG. 9, in the exact matching operation S132, the display area of the screen provided to the user via the display unit 133 is divided into a plurality of divided areas D1, D2, D3, D4, D5 and D6. The different planar images of the pre-matched synthesized three-dimensional image data are arranged in the divided areas D1, D2, D3, D4, D5, and D6.

The different planar images of the pre-matched synthetic 3D image data arranged in the divided areas D1, D2, D3, D4, D5 and D6 are distinguished according to the first 3D image data and the second 3D image data (For example, the profile of the first three-dimensional image data and the profile of the second three-dimensional image data are displayed in different colors), so that the user can visually recognize whether the data is matched.

As shown in FIG. 8 or FIG. 9, in the exact matching operation S132, the display area of the screen provided to the user via the display unit 133 is divided into the first divided area to the sixth divided area D1, D2, D3, D4, D5 and D6.

The first divided area D1 is a plane of the pre-matched synthesized three-dimensional image data and corresponds to a user's operation screen. In this embodiment, the first divided area D1 displays an image formed by cutting the pre-matched synthetic three-dimensional image data by the X-Y axis plane.

Three moving points M1, M2, and M3 are displayed in the first divided area D1. When the user moves an input point via the input unit 131 (such as a mouse, etc.), the images of the second to sixth divided areas D2, D3, D4, D5, and D6 are changed.

The second divided area D2 displays an image cut by the Y-Z axis plane at the position of the first moving point M1 of the first divided area D1. The third divided area D3 displays an image cut by the X-Z axis plane at the position of the first moving point M1 of the first divided area D1.

As the first moving point M1 of the first divided area D1 moves, the image of the second divided area D2 and the image of the third divided area D3 are changed to the position of the moved first moving point M1 Flat image.

The fourth divided area D4 shows an image cut by the Y-Z axis plane at the second moving point M2 of the first divided area D1. The fifth divided area D5 shows an image cut by the X-Z axis plane at the position of the second moving point M2 of the first divided area D1.

As the second moving point M2 of the first divided area D1 moves, the image of the fourth divided area D4 and the image of the fifth divided area D5 are changed to the position of the moved second moving point M2 Flat image.

The sixth divided area D6 shows an image cut by the Y-Z axis plane at the position of the third moving point M3 of the first divided area D1. As the third moving point M3 of the first divided area D1 moves, the image of the sixth divided area D6 is changed to a plane image at the position of the moved third moving point M3.

In the comparison between Figure 8 and Figure 9, it can be seen that the images of the second divided area to the sixth divided area D2, D3, D4, D5, and D6 will move according to the first moving point to the third The positions of points M1, M2 and M3 change and change.

The images of the second divided area to the sixth divided area D2, D3, D4, D5, and D6 are affected by the user's operation via the input unit 131. In other words, the image of the position and posture of the second three-dimensional image data displayed in the second divided area to the sixth divided area D2, D3, D4, D5, and D6 can be changed by the user's operation.

Therefore, when moving the first to third movement points M1, M2, and M3, the user checks the first three-dimensional image data and the multiple positions in the planar image of the pre-matched synthetic three-dimensional image data. Whether the second three-dimensional image data match each other. Subsequently, the user moves the second three-dimensional image data relative to the first three-dimensional image data via the input unit 131 to accurately match the first three-dimensional image data and the second three-dimensional image data.

The user can control the scale of the first three-dimensional image data by a scale control portion S displayed in the display area of the screen provided to the user through the display unit 133. The control of the scale of the first 3D image data is to change relative to the second 3D image data when there is an overall size difference between the first 3D image data and the second 3D image data The overall size of the first three-dimensional image data further facilitates an accurate matching operation between the first three-dimensional image data and the second three-dimensional image data.

Therefore, in the method for generating an image for implant diagnosis according to this embodiment, since the first three-dimensional image data and the second three-dimensional image data are pre-matched substantially quickly, and then the The pre-matched synthetic three-dimensional image data is matched substantially accurately, so that the overall matching time can be reduced and the matching accuracy can be improved.

Next, after completing the synthetic three-dimensional image data acquisition operation S130 by performing the exact matching operation S132, the user establishes a surgical plan. During surgical planning, the bone density of the alveolar bone of the target patient is a very important factor, and the placement, depth and direction of an implant are determined according to the state of the target patient's bone density.

Therefore, the bone density in an area where the jig P is placed is very important. In the bone density display operation S140 of the present embodiment, the bone density of an area in which the jig P is placed is very intuitively displayed.

In other words, in the bone density display operation S140 of this embodiment, as shown in FIGS. 3 and 4, by overlapping the virtual jig P to be placed on the target patient to synthesize three-dimensional image data, based on the virtual The jig P visually displays the bone density around the virtual jig P.

In the bone density display operation S140, the bone density calculated in the operation unit 132 in a region in contact with the contour outside the virtual jig P is displayed in a different color according to the value of the bone density.

Therefore, in the image generation system for implant diagnosis and the method for generating an image for implant diagnosis according to the present embodiment, since the bone density around the virtual fixture P is different according to the value of bone density The color is displayed so that the user can intuitively recognize the bone density around the virtual fixture P.

As described above, according to the above embodiment, since the bone density around the virtual jig to be placed on the target patient is visually displayed based on the virtual jig when the virtual jig overlaps the synthesized three-dimensional image data, the user The bone density around the virtual fixture can be identified intuitively.

Although the inventive concept has been specifically shown and explained with reference to exemplary embodiments of the inventive concept, it will be understood that various forms and details of the inventive concept can be changed without departing from the spirit and scope of the following patent application scope.

Claims (23)

    An image generation system for implant diagnosis includes: a first image information acquisition apparatus (first image information acquirement apparatus) to obtain a first three-dimensional (three-dimensional) about a mouth area of a target patient; 3D) image data; a second image information acquisition device for acquiring a second three-dimensional image data by scanning a plurality of plaster patterns of teeth of the target patient; and a data The processing device is configured to receive the first three-dimensional image data and the second three-dimensional image data, match the first three-dimensional image data with the second three-dimensional image data, and generate a synthetic three-dimensional image data (synthetic 3D image data), wherein when a virtual fixture to be placed on the target patient overlaps the synthetic three-dimensional image data, the data processing device visually displays the virtual fixture based on the virtual fixture Bone density around the virtual fixture.         The image generation system for implant diagnosis according to claim 1, wherein the data processing device visually displays the bone density of an area in contact with an outer contour of the virtual fixture.         The image generation system for implant diagnosis according to claim 1, wherein the bone density around the virtual fixture is displayed in a different color according to a value of the bone density.         The image generation system for implant diagnosis as described in claim 3, wherein the color is a colored color.         The image generation system for implant diagnosis according to claim 1, wherein the dental plaster models are provided with a matching reference for matching the first three-dimensional image data with the second three-dimensional image data Marking (matching reference marker).         The image generation system for implant diagnosis as described in claim 5, wherein the matching reference marks are provided in a plural form, and the matching reference marks are arranged to be spaced apart from each other.         The image generation system for implant diagnosis according to claim 1, wherein the data processing device includes: an input unit for receiving information from a user; and an operation unit (operation unit) for generating The synthetic three-dimensional image data is electrically connected to the input unit, and the synthetic three-dimensional image data is corrected based on the information input from the user; and a display unit electrically connected to the operation unit and used for visual The synthetic three-dimensional image data and the bone density around the virtual fixture.         The image generation system for implant diagnosis according to claim 7, wherein the data processing device generates the synthesized three-dimensional image data by performing a pre-matching operation and then performing an exact matching operation, the pre-matching operation Is to pre-match the first three-dimensional image data and the second three-dimensional image data based on the coordinates of the matching reference mark in the second three-dimensional image data, and the precise matching operation is to perform pre-matching In the synthesized three-dimensional image data, the second three-dimensional image data and the first three-dimensional image data are accurately matched.         The image generation system for implant diagnosis according to claim 8, wherein in the pre-matching operation, the operation unit divides a display area of the display unit into: a teeth area display zone ), In the tooth area display area, visually display a tooth area of the target patient in the first three-dimensional image data; a second three-dimensional image data display area (second 3D image data display zone) in the first The second three-dimensional image data display area visually displays the second three-dimensional image data; and a synthetic 3D image data display area (synthetic 3D image data display zone) in the synthetic three-dimensional image data display area, visually Display the synthesized three-dimensional image data, receive an input of the coordinate of the matching reference mark in the second three-dimensional image data display area via the input unit, and receive a pair in the tooth area display area via the input unit An input of a virtual coordinate corresponding to the coordinate of the matching reference mark, and displaying on the synthesized three-dimensional image data by matching the input coordinate of the matching reference mark G2 and the input virtual coordinate The pre-matched synthesized 3D image data is displayed in the area.         The image generation system for implant diagnosis according to claim 8, wherein in the exact matching operation, the operation unit divides the display area of the display unit into a plurality of divided zones, divides A plurality of different planar images of the pre-matched synthetic three-dimensional image data are arranged in the divided areas, and the second three-dimensional image data and the first in each divided area are received through the input unit One of the three-dimensional image data matches one of the input states.         The image generation system for implant diagnosis according to claim 10, wherein the divided areas include: a first area in which the display area is displayed along a first axis and with the first area A second image is obtained by cutting a pre-matched synthetic three-dimensional image data with a second axis crossing a second axis; a second area in the second area is displayed by A third axis intersecting a third axis cuts the pre-matched synthesized three-dimensional image data at a position where a first movement point is displayed in the first area to obtain a planar image; a first Three areas, in the third area, display the pre-matched synthesized three-dimensional by cutting along the first axis and the third axis at the position of the first movement point displayed in the first area Image data to obtain a planar image; a fourth area in which a second moving point is displayed in the first area by displaying along the second axis and the third axis Obtained by cutting the pre-matched synthetic 3D image data at a position A planar image; a fifth area, in which the display is made by cutting along the first axis and the third axis at the position of the second movement point displayed in the first area A plane image is obtained by cutting the pre-matched synthetic three-dimensional image data; and a sixth area, in which the display is performed in the first by along the second axis and the third axis A planar image is obtained by cutting the pre-matched synthetic three-dimensional image data at a position where a third moving point is displayed in the area.         The image generating system for implant diagnosis according to claim 11, wherein the first moving point to the third moving point can be moved by an operation of the user, and the image of the second area And the image of the third area changes in relation to the movement of one of the first moving points, the image of the fourth area and the image of the fifth area moves with one of the second moving points Relatedly changes, and the image of the sixth area changes related to the movement of one of the third moving points.         A method for generating an image for implant diagnosis. The method includes: a first image information acquisition operation, that is, acquiring a first three-dimensional image data about a mouth area of a target patient; a second Image information acquisition operation, that is, acquiring a second three-dimensional image data by scanning a plurality of dental plaster models of the target patient; a synthetic three-dimensional image data acquisition operation, that is, by using the first three-dimensional image Matching the data with the second three-dimensional image data to generate a synthetic three-dimensional image data; and based on the virtual by overlapping the virtual fixture to be placed on the target patient on the synthetic three-dimensional image data Fixture to visually display the bone density around the virtual fixture.         The method according to claim 13, wherein in the step of visually displaying the bone density, the bone density of a region in contact with an outer contour of the virtual fixture is visually displayed.         The method according to claim 13, wherein the bone density around the virtual fixture is displayed in a different color according to a value of the bone density.         The method according to claim 15, wherein the color is a colored color.         The method according to claim 13, wherein the second image information acquisition operation includes: generating a dental plaster model of the target patient; providing the first three-dimensional image on the dental plaster models of the target patient Matching the data with the second three-dimensional image data by a matching reference mark; and scanning the dental plaster models of the target patient.         The method according to claim 17, wherein the matching reference marks are provided in a plural form, and the matching reference marks are arranged to be spaced apart from each other.         The method according to claim 17, wherein the synthetic three-dimensional image data acquisition operation includes: a pre-matching operation, that is, based on a coordinate of the matching reference mark in the second three-dimensional image data, the first three-dimensional image Pre-match the data with the second 3D image data; and an exact matching operation, that is, to accurately match the second 3D image data with the first 3D image data in the pre-matched synthesized 3D image data Make a match.         The method according to claim 19, wherein the pre-matching operation includes: dividing one of the display areas of the display unit into: a tooth area display area in which the first three-dimensional image is visually displayed A tooth area of the target patient in the data; a second 3D image data display area in which the second 3D image data is visually displayed; and a synthesized 3D image data A display area, in the synthetic three-dimensional image data display area, visually displaying the synthetic three-dimensional image data, receiving input of one of the coordinates of the matching reference mark in the second three-dimensional image data display area, in the Receiving an input of a virtual coordinate corresponding to the coordinate of the matching reference mark in the tooth area display area, and by matching the input coordinate of the matching reference mark G2 and the input virtual coordinate, The pre-matched composite three-dimensional image data is displayed in the composite three-dimensional image data display area.         The method according to claim 19, wherein the exact matching operation comprises: dividing the display area of the display unit into a plurality of divided areas, and pre-matching the plurality of different plan views of the synthesized three-dimensional image data The images are arranged in the divided areas; and correction is performed so that in each divided area, the second three-dimensional image data and the first three-dimensional image data are matched.         The method of claim 21, wherein the divided areas include: a first area in which the display is sectioned along a first axis and a second axis crossing the first axis A flat image is obtained by cutting the pre-matched synthetic three-dimensional image data; a second area in which a third image is displayed by intersecting the second axis and intersecting the second axis The axis cuts the pre-matched synthetic three-dimensional image data at a position where a first movement point is displayed in the first area to obtain a planar image; a third area in the third area , Showing a plan view obtained by cutting the pre-matched synthetic three-dimensional image data along the first axis and the third axis at the position of the first movement point displayed in the first area Like; a fourth area in which the display is pre-matched by cutting along a second axis and the third axis at a position of a second movement point displayed in the first area A planar image obtained by synthesizing the three-dimensional image data; a fifth area in which the display is displayed in the first area along the first axis and the third axis Cutting a pre-matched synthetic three-dimensional image data at the position of the second moving point to obtain a planar image; and a sixth area in which the display is performed along the second axis and The third axis cuts the pre-matched synthetic three-dimensional image data at a position where a third moving point is displayed in the first area to obtain a planar image.         The method according to claim 22, wherein the first movement point to the third movement point can be moved by an operation of the user, the image of the second area and the image of the third area The image of the fourth area and the image of the fifth area change in relation to the movement of one of the first movement points, and the sixth area The image changes in relation to the movement of one of the third movement points.