WO2025105721A1 - Method for establishing implant surgery plan, and apparatus therefor - Google Patents

Abstract

A method for establishing an implant surgery plan, and an apparatus therefor are disclosed. In the present invention, individual teeth are grouped, and crown arrangement information of a target tooth is determined using tooth axis information of a tooth belonging to the same tooth group as the target tooth when an implant surgery plan is established. Therefore, the accuracy of crown arrangement is improved and user modification can be minimized.

Description

Method for establishing implant surgery plan and its device

The present invention relates to dental image data processing technology, and more specifically, to a user interface technology for establishing an implant surgery plan based on dental image data.

When planning an implant surgery using software, the patient's CT data and scan data are aligned to place the crown and implant. Typically, the crown is arranged on the scan data, and the direction of the implant is determined based on the crown information.

Commercialized software arranges crowns manually by user input or automatically after obtaining contact information with adjacent teeth or crowns, and then determines the implant placement direction based on the arranged crowns.

According to one embodiment, the present invention proposes a method for establishing an implant surgery plan and a device therefor, which can improve the accuracy of crown arrangement and implant placement and minimize user modifications.

A method for establishing an implant surgery plan according to one embodiment includes the steps of segmenting a plurality of individual teeth from dental image data, the step of grouping the segmented plurality of individual teeth according to tooth regions reflecting tooth numbers, the step of identifying a tooth group including a target tooth on which an implant is to be implanted, the step of determining crown arrangement information of the target tooth based on tooth axis information of a predetermined tooth belonging to the same tooth group as the target tooth, and the step of arranging crowns in the determined arrangement direction in the dental image data.

In the grouping step, teeth with the same tooth axis direction can be grouped based on the tooth angle in normal occlusion.

In the grouping step, teeth grouping can be performed on the anterior region including teeth No. 1 and 2, the canine region including tooth No. 3, the premolar region including teeth No. 4 and 5, and the molar region including teeth No. 6 and 7 in the maxillary data and mandibular data.

In the step of determining crown arrangement information, the crown arrangement information can be determined using the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth.

In the step of determining crown arrangement information, the crown arrangement information can be determined using the tooth axis information of the same name tooth of the target tooth.

In the step of determining crown arrangement information, the crown arrangement information can be determined using the tooth axis information of teeth belonging to the same tooth group as the homonymous tooth of the target tooth.

In the step of determining crown arrangement information, the crown arrangement information can be determined using the tooth axis information of the adjacent teeth in the mesial direction of the target tooth.

The step of determining crown arrangement information may include a step of assigning priorities in the following order: tooth axis information of an adjacent tooth belonging to the same tooth group as a target tooth, tooth axis information of a cognate tooth of the target tooth, tooth axis information of a tooth belonging to the same tooth group as the cognate tooth of the target tooth, and tooth axis information of an adjacent tooth in the mesial direction of the target tooth; and a step of determining crown arrangement information using the corresponding tooth axis information according to the assigned priorities.

The method for establishing an implant surgery plan may further include a step of receiving a user manipulation signal for selecting a predetermined reference tooth from dental image data, and a step of determining crown arrangement information using axial information of the selected reference tooth.

The method for establishing an implant surgery plan may further include a step of determining arrangement information of another crown belonging to the same tooth group as the target tooth using the crown arrangement information of the target tooth.

The method for establishing an implant surgery plan may further include a step of determining implant placement information using the arrangement information of the crown, and planting the implant based on the determined implant placement information.

The method for establishing an implant surgery plan may further include a step of providing a manipulator for modifying crown arrangement information, and a step of modifying the crown arrangement information by receiving a user operation signal through the manipulator.

The method for establishing an implant surgery plan may further include a step of modifying implant placement information to reflect the modified crown arrangement information.

The method for establishing an implant surgery plan may further include a step of providing a user interface for selecting whether to modify implant placement information to reflect modified crown arrangement information.

According to another embodiment, an implant surgery planning device includes a data acquisition unit that acquires dental image data, a display unit that displays a screen, and a control unit that segments a plurality of individual teeth from the acquired dental image data, groups the segmented plurality of individual teeth according to tooth regions reflecting tooth numbers, identifies a tooth group including a target tooth to be implanted, determines crown arrangement information of the target tooth based on tooth axis information of a predetermined tooth belonging to the same tooth group, and then arranges crowns in the dental image data through the display unit using the determined crown arrangement information.

According to one embodiment, the present invention groups individual teeth and determines crown arrangement information and implant placement information of a target tooth by using tooth axis information of teeth belonging to the same tooth group as the target tooth when establishing an implant surgery plan, thereby improving the accuracy of crown arrangement and implant placement and minimizing user modification.

Figure 1 is a drawing showing the configuration of an implant surgery planning device according to one embodiment of the present invention.

FIG. 2 is an exemplary drawing of a dental image data alignment screen according to one embodiment of the present invention;

FIG. 3 is an example drawing of tooth segmentation in CT data according to one embodiment of the present invention;

FIG. 4 is an example drawing of tooth segmentation in scan data according to one embodiment of the present invention;

FIG. 5 is an exemplary drawing of a tooth grouping screen according to one embodiment of the present invention;

FIG. 6 is an exemplary drawing of a screen for selecting a tooth number corresponding to a target tooth for implant surgery planning according to one embodiment of the present invention.

FIG. 7 is an exemplary drawing of a screen arranging a crown shape according to one embodiment of the present invention;

FIG. 8 is an exemplary drawing of a screen for determining crown arrangement information according to one embodiment of the present invention;

FIG. 9 is a screen example diagram showing a crown arrangement according to one embodiment of the present invention;

FIG. 10 is an exemplary drawing of a screen for determining crown arrangement information using the tooth axis information of a same name tooth according to one embodiment of the present invention.

FIG. 11 is an exemplary drawing of a screen for determining crown arrangement information using tooth axis information of teeth belonging to the same tooth group as the target tooth according to one embodiment of the present invention.

FIG. 12 is an exemplary drawing of a screen for determining crown arrangement information using the tooth axis information of adjacent teeth in the mesial direction of a target tooth according to one embodiment of the present invention.

FIG. 13 is an exemplary drawing of a screen for determining crown arrangement information using a user operation signal for selecting a reference tooth according to one embodiment of the present invention.

Figure 14 is an exemplary drawing of an implant placement screen according to one embodiment of the present invention.

FIG. 15 is an exemplary drawing of an implant and crown modification screen using a manipulator according to one embodiment of the present invention.

FIG. 16 is a drawing illustrating a flow chart of a method for establishing an implant surgery plan according to one embodiment of the present invention.

The advantages and features of the present invention, and the methods for achieving them, will become clear with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and the present embodiments are provided only to make the disclosure of the present invention complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In describing embodiments of the present invention, if it is determined that a specific description of a known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted, and the terms described below are terms defined to reflect functions in embodiments of the present invention, and these may vary depending on the intention or custom of the user or operator. Therefore, the definitions should be made based on the contents throughout this specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. However, the embodiments of the present invention exemplified below may be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art to which this invention belongs.

FIG. 1 is a drawing illustrating the configuration of an implant surgery planning device according to one embodiment of the present invention.

Referring to Fig. 1, the implant surgery planning device (100) is an electronic device capable of executing a medical image processing program. The electronic device includes a PC (Personal Computer), a laptop, a tablet, a smart phone, etc. The medical image processing program includes a guide design program, a scan program, a CAD program, etc. In addition, it can be applied to other general medical image processing programs other than those for dental implant surgery.

The image processing process using the program may vary depending on the commercialized product, but generally includes the steps of registering a surgical patient, acquiring CT data and scan data of a registered patient, matching the CT data and scan data, creating a jaw line from the matched dental image data, creating a panoramic image using the jaw line, arranging crowns from the patient's scan data, placing implants from the patient's CT data, designing a guide shape, and outputting an actual guide. The present invention corresponds to the crown arrangement and implant placement steps in the above process.

An implant surgery planning device (100) according to one embodiment includes a data acquisition unit (101), a storage unit (102), a control unit (103), an input unit (104), a display unit (105), and an output unit (106).

The data acquisition unit (101) acquires dental image data. The data acquisition unit (101) can acquire dental image data through a linked medical imaging device (not shown) or a separate database, etc. The dental image data can include CT data, scan data, etc.

The scan data may be model scan data obtained by scanning a plaster model created based on the patient's oral cavity using a 3D scanner, or oral scan data obtained by scanning the inside of the patient's oral cavity using a 3D intra-oral scanner.

The input unit (104) receives a user operation signal. At this time, the input unit (104) can receive a user operation signal for a user interface displayed on the screen. When a manipulator is displayed on the display unit (105), the input unit (104) can receive a user operation signal for modification through the manipulator displayed on the screen.

The display unit (105) displays information on the screen. For example, the display unit (105) can display dental image data on the screen. At this time, the dental image data can include scan data acquired through the data acquisition unit (101), CT data, data obtained by matching at least two pieces of data, panoramic data generated from the matching data, etc. The display unit (105) can display crowns, implants, drilling holes, guides, etc. by overlaying them on the dental image data. At this time, the crowns, implants, drilling holes, guides, etc. are virtual objects. The display unit (105) can display a manipulator to facilitate user modification through the input unit (104).

The output unit (106) can output an actual guide corresponding to the virtual guide shape designed by the control unit (103) through a 3D printer or milling equipment, etc. Here, the designed implant surgery guide shape can have an input data format of the 3D printer or milling equipment, and the 3D printer or milling equipment can output an actual implant surgery guide based on the input implant surgery guide shape.

The storage unit (102) stores various data such as information required for performing the operation of the implant surgery planning device (100) and information generated according to the operation. For example, the storage unit (102) stores the patient's dental image data and can provide it to the control unit (103) according to a user request.

According to one embodiment, the control unit (103) determines the arrangement information of the crown when establishing an implant surgery plan. The crown arrangement information may include information on the position, direction, and size of the crown. Furthermore, the control unit (103) may determine the implantation information. The implantation information may include information on the position, direction, and size of the implant. Each direction information may include angle information.

To this end, the control unit (103) can group a plurality of individual teeth according to a tooth region reflecting a tooth number, and determine the arrangement information of the crown using the tooth axis information of a predetermined tooth belonging to the same tooth group. The tooth region can be divided into an anterior region, a canine region, a premolar region, and a molar region. At this time, the grouping criterion according to the tooth region can be divided according to whether the tooth axis direction is the same within a predetermined error range in consideration of the tooth angle in normal occlusion. The 'tooth axis' is an extension line connecting the centers of gravity of the two regions after dividing the tooth crown region and the tooth root region, and corresponds to the long part of the tooth, i.e., the 'long axis'.

Specifically, the control unit (103) segments a plurality of individual teeth from dental image data. An example of segmenting individual teeth is described below with reference to FIGS. 3 and 4.

Next, the control unit (103) groups the divided individual teeth according to tooth regions that reflect the tooth numbers. The tooth regions include anterior tooth regions, canine tooth regions, premolar tooth regions, and molar tooth regions. An example of tooth grouping is described below with reference to FIG. 5.

Next, the control unit (103) checks the tooth group including the target tooth to be implanted, and determines the crown arrangement information of the target tooth using the tooth axis information of the teeth belonging to the same tooth group. For example, the crown arrangement direction can be determined so that the tooth axis direction and the crown arrangement direction match, and the crown arrangement position can be determined so that the tooth axis position and the crown arrangement position match.

The control unit (103) can determine crown arrangement information using the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth. For example, the control unit (103) determines the crown arrangement direction so that the crown arrangement direction of the target tooth matches the tooth axis direction of adjacent teeth belonging to the same tooth group. An embodiment of determining crown arrangement information using the tooth axis information of adjacent teeth belonging to the same tooth group will be described later with reference to FIG. 8.

As another example, the control unit (103) may determine crown arrangement information using the tooth axis information of the same-named tooth of the target tooth. For example, the control unit (103) determines the crown arrangement direction to match the tooth axis direction of the same-named tooth of the target tooth. In this case, there may be no tooth axis information of adjacent teeth in the same tooth group as the target tooth. An embodiment of determining crown arrangement information using the tooth axis information of the same-named tooth of the target tooth will be described later with reference to FIG. 10.

As another example, the control unit (103) determines crown arrangement information by using the tooth axis information of the teeth belonging to the same tooth group as the cognate tooth of the target tooth. For example, the control unit (103) determines the crown arrangement direction so that the crown arrangement direction of the target tooth matches the tooth axis direction of the teeth belonging to the same tooth group as the cognate tooth of the target tooth. This case may be a case where there is no tooth axis information of the adjacent teeth in the same tooth group as the target tooth and no tooth axis information of the cognate tooth. An embodiment of determining crown arrangement information by using the tooth axis information of the teeth in the group to which the cognate tooth belongs will be described below with reference to FIG. 11.

As another example, the control unit (103) determines the crown arrangement information to be parallel to the axis of the adjacent tooth in the mesial direction of the target tooth. For example, the control unit (103) determines the crown arrangement direction to match the axis of the adjacent tooth in the mesial direction of the target tooth. At this time, the adjacent tooth in the mesial direction of the target tooth is a tooth that does not belong to the same tooth group as the target tooth. This case may be a case where there is no axis information of an adjacent tooth in the same tooth group as the target tooth, no axis information of a cognate tooth, and no axis information of a tooth belonging to the same tooth group as the cognate tooth of the target tooth. An embodiment of determining crown arrangement information by using the axis information of a tooth belonging to the same tooth group as the cognate tooth of the target tooth will be described below with reference to FIG. 12.

The control unit (103) can assign priorities to the axial information. For example, the control unit (103) can assign priorities in the following order: axial information of an adjacent tooth belonging to the same tooth group as the target tooth, axial information of a cognate tooth of the target tooth, axial information of a tooth belonging to the same tooth group as the cognate tooth of the target tooth, and axial information of an adjacent tooth in the mesial direction of the target tooth. Accordingly, the control unit (103) can determine crown arrangement information using the corresponding axial information according to the assigned priorities.

As another example, the control unit (103) may receive a user manipulation signal for selecting a predetermined reference tooth from dental image data and determine crown arrangement information using the tooth axis information of the selected reference tooth.

Next, the control unit (103) controls the display unit (105) to arrange the crowns in the determined arrangement direction in the dental image data.

The control unit (103) can modify the crown arrangement information. For example, the control unit (103) can display a manipulator for modifying the crown arrangement information on the screen through the display unit (105) and receive a user operation signal through the manipulator from the input unit (104) to modify the crown arrangement information. An example of modifying the crown arrangement information using the manipulator will be described later with reference to (a) of FIG. 15.

Next, the control unit (103) can determine implant placement information using the arrangement information of the crown, and can implant the implant using the determined placement information. For example, the implant placement direction can be determined to match the arrangement direction of the crown. Or, the implant arrangement position can be determined to match the arrangement position of the crown. An implant placement example is described below with reference to FIG. 14.

The control unit (103) can modify the implant placement information. At this time, the control unit (103) can modify the implant placement information by reflecting the modified crown arrangement information. Furthermore, the control unit (103) can provide a user interface for selecting whether to modify the implant placement information by reflecting the modified crown arrangement information before modifying the implant placement information. An example of modifying the implant placement information is described below with reference to (b) of FIG. 15.

FIG. 2 is an exemplary drawing of a dental image data alignment screen according to one embodiment of the present invention.

Referring to FIGS. 1 and 2, the implant surgery planning device (100) places structures such as implants, crowns, and abutments using the patient's CT data (210) and scan data (220). At this time, the implants, crowns, and abutments are virtual objects. In general, the CT data (210) is used to place implants while checking structures that may be risk factors, including the patient's alveolar bone condition. The scan data (220) is used to arrange crowns and design guide shapes.

When acquiring two data (210, 220), the coordinate information of the two data (210, 220) is different. Therefore, as illustrated in FIG. 2, the implant surgery planning device (100) performs a matching process to match the coordinate information of the two data (210, 220) to generate matching data (230). The matching process may be an automatic matching method using an artificial intelligence (AI) algorithm based on learning data, or a manual matching method using a user manipulation signal to select 1 point or 3 points of a tooth from CT data (210) and scan data (220), respectively.

FIG. 3 is an example drawing of tooth segmentation in CT data according to an embodiment of the present invention, and FIG. 4 is an example drawing of tooth segmentation in scan data according to an embodiment of the present invention.

Referring to FIGS. 1, 3, and 4, the implant surgery planning device (100) can segment a plurality of teeth on CT data (210) or scan data (220). At this time, the implant surgery planning device (100) can segment a plurality of teeth through an artificial intelligence algorithm based on learning data. For example, the implant surgery planning device (100) acquires masking data for each tooth of a patient from CT data of previous patients, sets each of the acquired masking data as learning data, and trains an artificial neural network model. Subsequently, the implant surgery planning device (100) acquires the patient's CT data (210) and inputs it into the artificial neural network model to output dental image data in which a plurality of teeth are segmented.

The plurality of teeth (300) segmented using the patient's CT data (210) include both crown information and root information. The plurality of teeth (400) segmented using the patient's scan data (220) include only crown information. However, the tooth shape acquired from the scan data (220) may have more accurate shape information than the CT data (210) that may generate metal artifacts.

The implant surgery planning device (100) defines a plurality of segmented teeth as individual object shapes and assigns a tooth number to each tooth. For example, as illustrated in FIG. 4, the implant surgery planning device (100) defines a plurality of segmented teeth (400) as individual object shapes on scan data (220) and assigns a tooth number to each segmented tooth (400).

FIG. 5 is an exemplary drawing of a tooth grouping screen according to one embodiment of the present invention.

Referring to FIGS. 1 and 5, when the tooth segmentation and tooth number assignment process of dental image data (CT data or scan data) is completed, the implant surgery plan establishment device (100) uses each assigned tooth number information to group teeth as shown in FIG. 5.

For example, the implant surgery planning device (100) performs tooth grouping among the anterior region (510a, 510b) including teeth No. 1 and 2, the canine region (520a, 520b) including teeth No. 3, the premolar region (530a, 530b) including teeth No. 4 and 5, and the molar region (540a, 540b) including teeth No. 6 and 7 in the maxillary data (51) and the mandibular data (52) of the dental image data, respectively. At this time, the tooth grouping criterion may be whether the tooth axis direction is the same in consideration of the tooth angle in normal occlusion. At this time, the identity of the tooth axis direction allows a certain range of error. Normal occlusion refers to an occlusion state in which the teeth are considered anatomically normal in a state in which the maxillary teeth and the mandibular teeth are in maximum contact, and also refers to a case in which no problem occurs in the oral and maxillofacial system functionally.

The tooth group defined in this way is used to determine the direction of the crown when arranging the crown on the target tooth where the implant is to be implanted. For example, the implant surgery planning device (100) determines the initial direction of the crown based on the tooth axis information of a predetermined tooth in the same tooth group as the target tooth.

FIG. 6 is an exemplary drawing of a screen for selecting a tooth number corresponding to a target tooth for implant surgery planning according to one embodiment of the present invention.

Referring to FIGS. 1 and 6, the implant surgery planning device (100) selects a tooth number (610, 620, 630) corresponding to a target tooth to be implanted from dental image data (600). For example, the implant surgery planning device (100) may determine a tooth number by receiving a user manipulation signal for selecting a predetermined tooth (610, 620, 630), as illustrated in FIG. 6. As another example, the implant surgery planning device (100) may determine a tooth number (610, 620, 630) by linking the surgical information of a patient management program.

The implant surgery planning device (100) can first proceed with crown arrangement, which is a preliminary operation for implant placement, targeting a selected tooth number. At this time, the implant surgery planning device (100) can manually arrange the crown by receiving a user operation signal that determines the initial position and direction of the crown, and can also automatically arrange the crown using a predetermined crown arrangement algorithm.

FIG. 7 is an exemplary drawing of a screen arranging a crown shape according to one embodiment of the present invention.

Referring to FIG. 1 and FIG. 7, the implant surgery planning device (100) loads a crown shape (710) corresponding to a selected tooth number from a crown library (700) as shown in FIG. 7 and arranges it in a bounding box (720) of the selected tooth number in dental image data (700). At this time, the crown shape (710) is arranged according to the position and size of the bounding box (720).

FIG. 8 is an exemplary drawing of a screen for determining crown arrangement information according to one embodiment of the present invention.

Referring to FIGS. 1 and 8, the implant surgery planning device (100) determines the direction of the crown shape after determining the position and size of the crown shape as described above with reference to FIG. 7. At this time, the implant surgery planning device (100) can determine the crown arrangement direction to be parallel to the axial angle of the adjacent teeth belonging to the same tooth group as the selected target tooth. For example, as illustrated in FIG. 8, when the #16 tooth included in the molar group is selected as the target tooth for implant surgery planning, the arrangement direction of the #16 crown (810) is determined to be parallel to the axial angle of the #17 tooth (820), which is an adjacent tooth included in the same molar group. At this time, the implant surgery planning device (100) ensures that the axial direction of the #16 crown (810) is parallel to the axial direction of the adjacent teeth (820) belonging to the same tooth group (e.g., the molar group) in terms of both the lateral (a) and frontal (b) views.

FIG. 9 is a screen example diagram showing a crown arrangement according to one embodiment of the present invention.

Referring to FIG. 1 and FIG. 9, the implant surgery planning device (100) provides crowns (810) arranged on at least one of the 3D dental image data screen (a) and the 2D dental image data screen (b) according to crown arrangement information, as shown in FIG. 9. At this time, the implant surgery planning device (100) provides tooth axis information (822) of a reference tooth (820) and tooth axis information (812) of a crown (810) together so that a user can check them.

FIG. 10 is an exemplary drawing of a screen for determining crown arrangement information using tooth axis information of a same name according to one embodiment of the present invention.

Referring to FIGS. 1 and 10, the implant surgery planning device (100) determines crown arrangement information such that the axial direction (1012) of the crown (1010) is parallel to the axial direction (1022) of the cognate tooth (1020). Here, the cognate tooth is a normal tooth located on the opposite side of the target tooth with respect to the midline (1030). The opposite side means the upper right position symmetrical with respect to the midline when the target tooth is on the left side of the maxilla, and the lower left position symmetrical with respect to the midline when the target tooth is on the right side of the mandible. For example, in the case of tooth numbers classified into 10s, 20s, 30s, and 40s by dividing them into four groups with respect to the midline, the cognate tooth on the opposite side of tooth #17 is tooth #27. Here, when divided into four, the 10s represent the upper left, the 20s represent the upper right, the 30s represent the lower left, and the 40s represent the lower right.

For example, if tooth #27 included in the molar group is selected as the target tooth for implant placement as shown in FIG. 10, the implant surgery planning device (100) first determines whether tooth #26 (1030), which is an adjacent tooth included in the same molar group, can be utilized. At this time, if tooth #26 (1030) is determined to be missing and cannot be utilized, the implant surgery planning device (100) second determines the arrangement direction of the crown (1010) of tooth #27 by reflecting the angle information mirrored in a state parallel to the tooth axis direction of tooth #17 (1020), which is the cognate tooth of tooth #27.

FIG. 11 is an exemplary drawing of a screen for determining crown arrangement information using tooth axis information of teeth belonging to the same tooth group as the target tooth according to one embodiment of the present invention.

Referring to FIG. 1 and FIG. 11, the implant surgery planning device (100) determines crown arrangement information using tooth axis information of a predetermined tooth belonging to the same tooth group as the target tooth.

For example, if tooth #26 included in the molar group as illustrated in FIG. 11 is selected as the target tooth to be implanted, the implant surgery planning device (100) first determines whether tooth #27 (1130), which is an adjacent tooth belonging to the same molar group as the target tooth, can be utilized. At this time, if it is determined that tooth #27 (1130) is missing and cannot be utilized, the implant surgery planning device (100) second determines whether tooth #16 (1140), which is a cognate tooth of tooth #26, can be utilized. At this time, if it is determined that tooth #16 (1140) is missing and cannot be utilized, the implant surgery planning device (100) third determines arrangement information of crown #26 (1110) using tooth axis information of tooth #17 (1120) belonging to the same tooth group as tooth #16 (1140), which is a cognate tooth of tooth #26. For example, the arrangement direction of the #26 crown (1110) is determined by reflecting the angle information mirrored in a state parallel to the axial direction of the #17 tooth (1120).

If both the #26 tooth and the #27 tooth belonging to the molar group are selected as target teeth for implant placement, as shown in FIGS. 10 and 11, the arrangement direction of the #26 crown (1110) and the #27 crown (1010) is parallel to the #17 tooth (1120), so that the #26 crown (1110) is parallel to the arrangement direction of the #27 crown (1010) belonging to the same tooth group.

FIG. 12 is an exemplary drawing of a screen for determining crown arrangement information using axial information of adjacent teeth in the mesial direction of a target tooth according to one embodiment of the present invention.

Referring to FIGS. 1 and 12, when the implant surgery planning device (100) cannot utilize all of the tooth axis information of the adjacent teeth belonging to the same tooth group as the target tooth, the tooth axis information of the cognate tooth of the target tooth, and the tooth axis information of the teeth belonging to the same tooth group as the cognate tooth of the target tooth, it utilizes the tooth axis information of the adjacent teeth located in the mesial direction of the target tooth. At this time, the adjacent teeth located in the mesial direction of the target tooth do not belong to the same tooth group as the target tooth.

For example, as illustrated in FIG. 12, if a molar group including tooth #36, tooth #37, tooth #46, and tooth #47 is selected as a target tooth to be implanted as all missing teeth, there is no axial information for the teeth of the molar group. Therefore, the implant surgery planning device (100) determines the crown arrangement direction so that the #36 crown (1210) is parallel to the axial direction of the #35 tooth (1250) located in the mesial direction of the #36 tooth. Then, the implant surgery planning device (100) determines the crown arrangement direction so that the #37 crown (1220) is parallel to the #36 crown (1210).

Meanwhile, the implant surgery planning device (100) utilizes the axial information of the #45 tooth located in the mesial direction for the #46 crown (1230) and the #47 crown (1240) in the same manner. For example, the implant surgery planning device (100) determines the arrangement direction of the #46 crown (1230) so that it is parallel to the axial direction of the #45 tooth located in the mesial direction of the #46 tooth. Then, the implant surgery planning device (100) determines the arrangement direction of the #47 crown (1240) so that it is parallel to the #46 crown (1230).

The priority for determining crown arrangement information is that, if there is axial information of an adjacent tooth belonging to the same tooth group as the target tooth where the implant is to be installed, the axial information of the adjacent tooth within the tooth group is defined as the first priority. If the axial information of the adjacent tooth belonging to the same tooth group as the target tooth cannot be utilized, the axial information of the co-named tooth of the target tooth is defined as the second priority. If the axial information of the co-named tooth cannot be utilized, the axial information of the tooth belonging to the same tooth group as the co-named tooth of the target tooth is utilized as the third priority. If the axial information of the adjacent tooth within the same tooth group as the target tooth, the co-named tooth of the target tooth, and the tooth belonging to the same tooth group as the co-named tooth of the target tooth cannot be utilized, the axial information of the adjacent tooth in the mesial direction of the target tooth is utilized as the fourth priority. If it cannot be utilized, the corresponding tooth is missing.

FIG. 13 is an exemplary drawing of a screen for determining crown arrangement information using a user operation signal for selecting a reference tooth according to one embodiment of the present invention.

More specifically, (a) is an example drawing of a screen for determining crown arrangement information using axial information of adjacent teeth within a tooth group, and (b) is an example drawing of a screen for determining crown arrangement information using a user operation signal for selecting a reference tooth.

Referring to FIGS. 1 and 13, as shown in (a), crown arrangement information can be automatically determined using a crown arrangement algorithm, but as shown in (b), a user manipulation signal for selecting a reference tooth to be used as crown arrangement information can be received and crown arrangement information can be determined using the tooth axis information of the selected reference tooth. For example, the arrangement direction of the crown can be determined to have the same angle as the tooth axis direction of the reference tooth.

To this end, when a target tooth for implant placement is selected, the implant surgery planning device (100) activates the angle copy function and receives a user manipulation signal (1340) for selecting a reference tooth (1330) to be used as crown direction information. Subsequently, the implant surgery planning device (100) determines the arrangement direction of the crown (1310) to be parallel to the axial direction of the selected reference tooth (1330). At this time, the implant surgery planning device (100) can determine the arrangement direction of the crown (1310) to have the same direction as the axial direction of the reference tooth (1330) selected by the user, regardless of the tooth (1320) belonging to the same tooth group as the target tooth.

FIG. 14 is an exemplary drawing of an implant placement screen according to one embodiment of the present invention.

Referring to FIG. 1 and FIG. 14, when the crown arrangement information of the target tooth to be implanted is determined, the implant surgery planning device (100) determines implant placement information using the crown arrangement information. The implant placement information includes implant placement direction and placement location information.

Determining implant placement information For example, the implant surgery planning device (100) determines an implant placement position so that the implant (1420) is placed at a predetermined distance (1450) from the bottom of the gum margin (1440) where the axis (1430) of the crown (1410) arranged according to the crown arrangement information meets. Then, the implant surgery planning device (100) determines the placement direction of the implant (1420) so that it has the same direction as the axis (1430) of the crown (1410).

FIG. 15 is an exemplary drawing of an implant and crown modification screen using a manipulator according to one embodiment of the present invention.

In more detail, (a) is an example drawing of a screen for modifying the position, orientation, and size of a crown using the first manipulator, and (b) is an example drawing of a screen for modifying the position and orientation of an implant using the second manipulator.

Referring to FIG. 1 and FIG. 15, the implant surgery planning device (100) provides a first manipulator (1510) to modify arrangement information of a crown (1410). In addition, the implant surgery planning device (100) provides a second manipulator (1520) to modify implantation information of an implant (1420). The first manipulator (1510) may include a user interface for modifying crown arrangement information including a position, direction, and size of the crown (1410). The second manipulator (1520) may include a user interface for modifying implantation information including a size, position, and direction of the implant (1420).

The implant (1420) placement information is determined based on the arrangement information of the crown (1410). Therefore, when the arrangement information of the crown (1410) is modified, the implant surgery planning device (100) can provide a user interface that allows the user to select whether to modify the implant (1420) placement information by reflecting the modified crown arrangement information. If the arrangement information of the crown (1410) is modified and the implant (1420) placement information is modified, the implant (1420) placement information can be modified based on the arrangement information of the crown (1410). In contrast, when only the arrangement information of the crown (1410) is modified, the implant (1420) placement information is maintained as is.

FIG. 16 is a drawing illustrating a flow chart of a method for establishing an implant surgery plan according to one embodiment of the present invention.

Referring to FIG. 1 and FIG. 16, the implant surgery planning device (100) segments a plurality of individual teeth from dental image data (S1610).

Next, the implant surgery planning device (100) groups the divided individual teeth into groups by tooth area by reflecting the tooth number (S1620).

In step S1620, the implant surgery planning device (100) can group teeth having the same axial direction based on the tooth angle in normal occlusion. For example, the implant surgery planning device (100) can group teeth in the anterior region including teeth No. 1 and 2, the canine region including teeth No. 3, the premolar region including teeth No. 4 and 5, and the molar region including teeth No. 6 and 7 in the maxillary data and the mandibular data.

Next, the implant surgery planning device (100) confirms a group of teeth including a target tooth to be implanted (S1630).

Next, the implant surgery planning device (100) determines crown arrangement information of the target tooth based on the tooth axis information of a predetermined tooth belonging to the same tooth group (S1640).

At step S1640, the implant surgery planning device (100) can determine crown arrangement information using the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth.

In step S1640, the implant surgery planning device (100) can determine crown arrangement information using the tooth axis information of the cognate tooth of the target tooth when there is no tooth axis information of the adjacent tooth belonging to the same tooth group as the target tooth. For example, the crown arrangement direction can be determined so that the tooth axis direction of the cognate tooth of the target tooth matches the crown arrangement direction.

At step S1640, if there is no axial information of an adjacent tooth belonging to the same tooth group as the target tooth and no axial information of a cognate tooth of the target tooth, the implant surgery planning device (100) can determine crown arrangement information using axial information of a tooth belonging to the same tooth group as the cognate tooth.

In step S1640, the implant surgery planning device (100) can determine crown arrangement information using the axial information of the adjacent teeth in the mesial direction of the target tooth when there is no axial information of an adjacent tooth belonging to the same tooth group as the target tooth, no axial information of a cognate tooth of the target tooth, and no axial information of a tooth belonging to the same tooth group as the cognate tooth.

In step S1640, the implant surgery planning device (100) can assign priorities in the following order: tooth axis information of an adjacent tooth belonging to the same tooth group as the target tooth, tooth axis information of a cognate tooth of the target tooth, tooth axis information of a tooth belonging to the same tooth group as the cognate tooth, and tooth axis information of an adjacent tooth in the mesial direction of the target tooth. Accordingly, the implant surgery planning device (100) can determine crown arrangement information using the corresponding tooth axis information according to the assigned priorities.

As another example, at step S1640, the implant surgery planning device (100) may receive a user manipulation signal for selecting a predetermined reference tooth from dental image data and determine crown arrangement information using the tooth axis information of the selected reference tooth.

At step S1640, the implant surgery planning device (100) can use the crown arrangement information of the target tooth to determine the arrangement information of other crowns belonging to the same tooth group as the target tooth.

Next, the implant surgery planning device (100) arranges the crowns on the dental image data using the determined crown arrangement information (S1650).

In addition, the implant surgery planning device (100) can modify the crown arrangement information after step S1650. For example, the implant surgery planning device (100) can provide a manipulator for modifying the crown arrangement information and modify the crown arrangement information by receiving a user operation signal through the manipulator.

Next, the implant surgery planning device (100) determines implant placement information using the crown arrangement information, and implants the implant using the determined placement information (S1660).

Next, the implant surgery plan establishment device (100) can modify the implant placement information after step S1660. For example, the implant surgery plan establishment device (100) can modify the implant placement information by reflecting the modified crown arrangement information. Before modifying the implant, the implant surgery plan establishment device (100) can provide a user interface for selecting whether to modify the implant placement information by reflecting the modified crown arrangement information.

The present invention has been described with reference to embodiments thereof. Those skilled in the art will understand that the present invention can be implemented in modified forms without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered from an illustrative rather than a restrictive perspective. The scope of the present invention is indicated by the claims, not the foregoing description, and all differences within the scope equivalent thereto should be interpreted as being included in the present invention.

Claims (15)

In a method for establishing an implant surgery plan using an implant surgery planning device, A step of segmenting multiple individual teeth from dental image data; A step of grouping the above-mentioned divided plurality of individual teeth according to tooth areas reflecting tooth numbers; A step for identifying a group of teeth that contain the target teeth for implant placement; A step of determining crown arrangement information of the target tooth based on the tooth axis information of a predetermined tooth belonging to the same tooth group; and A step of arranging the crown on the dental image data using the determined crown arrangement information; A method for establishing an implant surgery plan, characterized by including a. In the first paragraph, the grouping step A method for establishing an implant surgery plan characterized by grouping teeth with the same tooth axis direction based on the tooth angle in normal occlusion. In the first paragraph, the grouping step A method for establishing an implant surgery plan characterized by performing tooth grouping among the anterior region, canine region, premolar region, and molar region in maxillary data and mandibular data. In the first paragraph, the step of determining crown arrangement information is A method for establishing an implant surgery plan characterized by determining crown arrangement information using axial information of adjacent teeth belonging to the same tooth group as the target tooth. In the first paragraph, the step of determining crown arrangement information is A method for establishing an implant surgery plan characterized by determining crown arrangement information using the axial information of the same tooth as the target tooth. In the first paragraph, the step of determining crown arrangement information is A method for establishing an implant surgery plan characterized by determining crown arrangement information using tooth axis information of teeth belonging to the same tooth group as the target tooth. In the first paragraph, the step of determining crown arrangement information is A method for establishing an implant surgery plan characterized by determining crown arrangement information using axial information of adjacent teeth in the mesial direction of a target tooth. In the first paragraph, the step of determining crown arrangement information is A step of assigning priorities in the following order: tooth axis information of an adjacent tooth belonging to the same tooth group as the target tooth, tooth axis information of a cognate tooth of the target tooth, tooth axis information of a tooth belonging to the same tooth group as the cognate tooth, and tooth axis information of an adjacent tooth in the mesial direction of the target tooth; and A step of determining crown arrangement information by using the corresponding axis information according to the assigned priority; A method for establishing an implant surgery plan, characterized by including a. In the first paragraph, the method for establishing an implant surgery plan is A step of receiving a user operation signal for selecting a predetermined reference tooth from dental image data; and A step of determining crown arrangement information using the axial information of the selected reference tooth; A method for establishing an implant surgery plan, characterized by further including: In the first paragraph, the method for establishing an implant surgery plan is A step of determining arrangement information of other crowns belonging to the same tooth group as the target tooth by using the crown arrangement information of the target tooth; A method for establishing an implant surgery plan, characterized by further including: In the first paragraph, the method for establishing an implant surgery plan is A step of determining implant placement information using crown arrangement information and placing an implant based on the determined implant placement information; A method for establishing an implant surgery plan, characterized by further including: In the first paragraph, the method for establishing an implant surgery plan is A step of providing a manipulator for modifying crown array information; and A step of modifying crown arrangement information by receiving a user operation signal through a manipulator; A method for establishing an implant surgery plan, characterized by further including: In Article 12, a method for establishing an implant surgery plan is provided. A step of modifying implant placement information to reflect the modified crown arrangement information; A method for establishing an implant surgery plan, characterized by further including: In Article 12, a method for establishing an implant surgery plan is provided. A step of providing a user interface for selecting whether to modify the implant placement information to reflect the modified crown arrangement information; A method for establishing an implant surgery plan, characterized by further including: A data acquisition unit for acquiring dental image data; A display section for displaying a screen; and A control unit for segmenting a plurality of individual teeth from the acquired dental image data, grouping the segmented plurality of individual teeth according to tooth regions reflecting tooth numbers, identifying a tooth group including a target tooth to be implanted, determining crown arrangement information of the target tooth based on tooth axis information of a predetermined tooth belonging to the same tooth group as the target tooth, and then arranging the crown on the dental image data through the display unit using the determined crown arrangement information; An implant surgery planning device comprising:

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