JP6637116B2 - Medical three-dimensional model and manufacturing method thereof - Google Patents

Description

  The present invention relates to a medical three-dimensional model and a method for manufacturing the same.

  In the medical field, a medical three-dimensional model representing a bone or an organ of a living body is used. The medical three-dimensional model can be produced by, for example, a three-dimensional molding method. Patent Document 1 describes a method for producing a bone body model (medical three-dimensional model) by cutting a Styrofoam block.

JP 2011-25309 A

  The medical three-dimensional model can be used, for example, in a simulated operation before actual operation of a living body. If the results of the simulated surgery can be accurately verified, practical training of the surgery becomes possible, and the actual surgery can be performed more appropriately.

  However, the conventional medical three-dimensional model produced by the three-dimensional molding method or the cutting of the styrene foam block is an integrally molded product. Therefore, if the cut portion obtained by the simulated operation is inside the medical three-dimensional model, it is difficult to confirm the shape, size, and position of the cut portion. In this case, the result of the simulated surgery cannot be accurately verified. Further, it takes time and cost to manufacture the conventional medical three-dimensional model.

  An object of the present invention is to provide a medical three-dimensional model that enables accurate verification of the result of a simulated operation and that can be manufactured in a short time and at low cost, and a method of manufacturing the same.

(1) The medical three-dimensional model according to the first invention is a medical three-dimensional model of a target part of a living body including at least a part of a bone or an organ, and has a shape configuration representing a plurality of cross-sectional shapes of the target part. A plurality of slice plates each having a unit and an auxiliary part for connection, and comprising a plurality of slice plates stacked, the shape constituent parts of the plurality of slice plates represent the shape of the target portion in a stacked state, and among the plurality of slice plates, At least some of the slice plates are rotated relative to other slice plates about the axis in the stacking direction of the auxiliary unit in a state where the plurality of slice plates are connected to each other by the axis in the stacking direction in the auxiliary unit. It is configured to be possible.

  According to this medical three-dimensional model, practical training for surgery is possible. Further, a medical stereo model can be used for explaining the operation to the patient. Furthermore, since this medical three-dimensional model can be manufactured inexpensively and in a short time, it becomes possible to manufacture a medical three-dimensional model having the same shape as the actual target site for each patient.

In addition, since the auxiliary unit for connection is provided et the, even when the target site has a complex shape, by connecting a plurality of slices plate and at least a portion of the slice plate relative to the other slice plate It is easy to make it rotatable.

(2) At least some of the slice plates may be detachably provided from other slice plates by removing the at least some of the slice plates from the axis in the stacking direction .

( 3 ) When at least some of the slice plates are connected to each other at a position different from the axis of the auxiliary portion in the stacking direction at the auxiliary portion and at least some of the slice plates are connected to another slice plate. It may be prevented from relatively rotating with respect to .

  (4) At least some of the slice plates rotate relative to other slice plates when at least some of the slice plates are connected at the axis of the auxiliary portion in the stacking direction and are connected at the shape configuration portion. May be prevented.
  (5) At least some of the slice plates may have a plurality of auxiliary portions that are separated from each other.
  (6) When at least some of the slice plates are connected at the plurality of auxiliary portions, at least some of the slice plates may be prevented from rotating relative to other slice plates.

(7) The colors of the outer peripheral end faces of the plurality of slice plates may be different from the colors inside the plurality of slice plates .

According to the above structure, when cutting the portion of the medical three-dimensional model in simulating sham surgery, it can be clearly seen by comparing the state of the cutting portion in a state before cutting. Therefore, the quality of the cut portion can be easily and accurately determined during and after the simulated surgery.

( 8 ) The auxiliary part may be provided at a position corresponding to a part of the target part of the living body that is not cut in an actual operation.

( 9 ) The target site may include at least a part of the bone .

  ADVANTAGE OF THE INVENTION According to this invention, while being able to verify the result of simulated surgery accurately using a medical three-dimensional model, it becomes possible to manufacture a medical three-dimensional model in a short time and at low cost.

It is a perspective view of the medical solid model concerning a 1st embodiment. FIG. 2 is a schematic diagram for explaining a target part of a living body represented by the medical three-dimensional model in FIG. 1. FIG. 2 is a partially exploded perspective view of the medical stereo model of FIG. 1. It is a perspective view which shows the example which partially rotates some slice boards in a medical three-dimensional model. It is explanatory drawing which shows the basic procedure of hip replacement. It is a perspective view of a medical three-dimensional model after simulated surgery by cutting. It is a top view showing an example of a slice board before a simulated operation and after a simulated operation. It is a flowchart which shows the manufacturing method of a medical solid model. FIG. 9 is a diagram for explaining a specific example of a method for manufacturing the medical three-dimensional model shown in FIG. 8. FIG. 9 is a diagram for explaining a specific example of a method for manufacturing the medical three-dimensional model shown in FIG. 8. It is a perspective view of the medical solid model concerning a 2nd embodiment. FIG. 12 is a plan view showing a part of a plurality of slice plates constituting the medical stereo model of FIG. 11.

  A medical three-dimensional model and a method for manufacturing the same according to an embodiment of the present invention will be described with reference to the drawings. The medical three-dimensional model is a three-dimensional model representing a target part of a living body including at least a part of a bone or an organ. Hereinafter, a medical three-dimensional model representing a part of the pelvis will be described as an example of the medical three-dimensional model.

[1] First Embodiment (1) Configuration of Medical Stereo Model FIG. 1 is a perspective view showing a medical stereo model according to the first embodiment, and FIG. 2 is a medical stereo model of FIG. FIG. 2 is a schematic diagram for explaining a target part of a living body represented by reference numeral 1. FIG. 2 shows the pelvis B0, the right femur B3, and the left femur B4 as the skeleton of the living body and its surroundings. The pelvis B0 includes a right hip B1 and a left hip B2. As shown by the dot pattern in FIG. 2, the medical stereo model 1 of FIG. 1 represents the acetabulum B11 and its vicinity in the right hip bone B1.

  In FIG. 1 and the three-dimensional medical model 1 shown in FIGS. 3, 4, 6, and 11 described later, a portion representing the acetabulum B11 in FIG. FIG. 1A shows the medical three-dimensional model 1 when a part of the right hip bone B1 having the acetabulum B11 of FIG. 2 is viewed in the direction of the thick dotted arrow AR1. FIG. 1B shows the medical three-dimensional model 1 when a part of the right hip bone B1 having the acetabulum B11 of FIG. 2 is viewed in the direction of the thick dotted arrow AR2.

  The medical three-dimensional model 1 shown in FIGS. 1A and 1B can be used, for example, in a simulated surgery for attaching an artificial hip joint to the pelvis B0 (hereinafter, referred to as an artificial hip joint replacement). FIG. 3 is a partially exploded perspective view of the medical three-dimensional model 1 of FIG. As shown in FIG. 3, the medical three-dimensional model 1 includes a plurality of slice plates 11 and at least one connection shaft 21. In the present embodiment, the three-dimensional medical model 1 has a plurality of connecting shafts 21.

  The plurality of slice plates 11 have a certain thickness (for example, about 3 mm), and represent a plurality of cross-sectional shapes of a target part of the living body (a part of the right hip bone B1 in this example). Further, the plurality of slice plates 11 represent the shape of the target part of the living body in a state where the slice plates 11 are stacked according to a predetermined positional relationship.

  The plurality of slice plates 11 are cut out from a wooden plate member having a certain thickness using a laser cutter. Here, the wooden plate member has, for example, a pale yellow color. When a wooden plate member is cut using a laser cutter, the cut surface changes color to black due to the heat of the laser. Thereby, the color of the outer peripheral end surface of each of the plurality of slice plates 11 is different from the color (light yellow) of the base material of the slice plate 11, as shown by hatching in FIG. Further, each of the plurality of slice plates 11 is assigned a predetermined unique identification number. Details of the identification number will be described later. Note that, in FIG. 3 and FIGS. 4 and 7 described later, the identification numbers are not shown.

  Further, at least one through hole H is formed in each of the plurality of slice plates 11. In the present embodiment, at least two (two or four in the example of FIG. 3) circular through holes H are formed in each of the plurality of slice plates 11. The plurality of through holes H have a common inner diameter. The plurality of connecting shafts 21 are rod-shaped members having a circular cross section. The outer diameter of the connecting shaft 21 is smaller than the inner diameter of the through hole H.

  In a state where the plurality of slice plates 11 are stacked according to a predetermined positional relationship, the through holes H of the plurality of slice plates 11 communicate with each other in a straight line. The plurality of connecting shafts 21 are inserted into the through holes H of the plurality of slice plates 11 with a certain clearance. Thereby, the plurality of slice plates 11 are connected to each other so as to maintain a predetermined positional relationship.

  In the example of FIG. 3, two through holes H are formed in the first to third slice plates 11 from the top, and four through holes H are formed in the fourth slice plate 11. Two connecting shafts 21 are respectively inserted into two through holes H of the first to fourth slice plates 11 so as to connect the first to fourth slice plates 11.

  Further, two through holes H are formed in the fifth to eighth slice plates 11. Two connecting shafts 21 are respectively inserted into the two through holes H of the fourth to eighth slicing plates 11 so as to connect the fourth to eighth slicing plates 11. In FIG. 3, the illustration of the connected state of the ninth and lower slice plates 11 is omitted.

  By inserting the connection shaft 21 into each through hole H of the plurality of slice plates 11, the stacked slice plates 11 are positioned so as to represent the shape of the target portion. The three-dimensional medical model 1 of the present embodiment can be easily and accurately assembled from the plurality of slice plates 11 and the plurality of connection shafts 21.

  In the three-dimensional medical model 1 of the present embodiment, since the connecting shaft 21 is inserted into each through hole H with a certain clearance, the user can easily pull out each connecting shaft 21 from the through hole H. it can.

  In addition, the user pulls one connecting shaft 21 out of the two connecting shafts 21 from the slice plate 11 to connect one slice shaft 11 to another slice plate 11 to connect one slice shaft 11 to another slice plate 11. It can be relatively rotated as a center.

  FIG. 4 is a perspective view showing an example of partially rotating some slice plates 11 in the medical three-dimensional model 1. In the example of FIG. 4, the 14th slice plate 11 is called one slice plate 11A, and the 13th slice plate 11 is called another slice plate 11B. Two connecting shafts 21 for connecting one slice plate 11A and another slice plate 11B are called connection shafts 21a and 21b.

  In this case, as shown by the thick solid line arrow in FIG. 4, the user pulls out the connecting shaft 21a from the through hole H of the other slice plate 11B to remove the other slice plate 11B and the upper slice plate 11 therefrom. It is possible to rotate the slice plate 11A and the slice plate 11 below the slice plate 11A relative to the connection shaft 21b.

  As described above, the user rotates a part of the slice plates 11 relative to the other slice plates 11 or removes some of the slice plates 11 from the other slice plates 11 to thereby obtain a plurality of slice plates. Can be partially disassembled. Therefore, it is possible to easily and accurately confirm the shape, size, and position of a desired portion in the target portion of the living body.

(2) Example of Simulated Surgery Using Medical Three-Dimensional Model An outline of hip replacement surgery will be described. FIG. 5 is an explanatory diagram showing a basic procedure of the hip replacement surgery. 5A to 5F, the right hip bone B1 and the right femur B3 are shown by solid lines as the skeleton of the living body and its surroundings. The skin covering the right hip bone B1 and the right femur B3 is indicated by a dashed line.

  First, as shown in FIG. 5A, a part of the skin covering the hip joint is incised. The femoral head B31 of the right femur B3 is removed from the acetabulum B11 of the right hip bone B1 through the opening B5 formed by the incision. Thereafter, as shown in FIG. 5B, the femoral head B31 of the right femur B3 is cut, and the cut femoral head B31 is removed.

  Here, as shown in FIG. 5F described later, the artificial hip joint 90 mainly includes a socket 91, an artificial head 92, and a stem 93. The socket 91 has a hemispherical shape, and functions as an artificial acetabulum B11 by being fixed to the hipbone (the right hipbone B1 in this example). The socket 91 is composed of, for example, a metal outer cup and a resin inner cup. The stem 93 has a substantially rod shape, and functions as a part of the femur (in this example, the right femur B3).

  After the femoral head B31 of the right femur B3 in FIG. 5B is removed, in order to fix the socket 91 in FIG. 5D to the right hip bone B1, as shown in FIG. The acetabulum B11 is cut by the reamer 80. Thereafter, as shown in FIG. 5D, the socket 91 is fixed to the cut acetabular part B11 by using a screw or a bone cement as necessary.

  Subsequently, as shown in FIG. 5E, the stem 93 is inserted into the right femur B3 from above. The stem 93 is fixed with its upper end slightly projecting from the upper end of the right femur B3. In this state, the artificial head 92 is attached to the upper end of the stem 93. Thereafter, as shown in FIG. 5F, the artificial head 92 is attached to the socket 91 fixed to the right hip bone B1. Thus, the artificial bone head 92 is slidably received in the socket 91. Lastly, the hip replacement is completed by closing the opening B5.

  The user of the medical three-dimensional model 1 can simulate the cutting of the acetabulum B11 (see FIG. 5C) as a simulated operation of the hip replacement surgery. FIG. 6 is a perspective view of the medical three-dimensional model 1 after the simulated surgery by cutting. By the simulated surgery of the artificial hip joint replacement, a portion representing the acetabulum B11 of the three-dimensional medical model 1 is cut by a reamer (not shown). In this case, the color (light yellow) of the base material of the slice plate 11 appears in the cut portion by the reamer, as indicated by the thick white arrow in FIG.

  FIG. 7 is a plan view showing an example of the slice plate 11 before and after the simulated surgery. FIG. 7A shows a plan view of the slice plate 11 before the simulated operation, and FIG. 7B shows a plan view of the slice plate 11 after the simulated operation. In FIG. 7B, the cut portion of the slice plate 11 by the reamer is indicated by a thick white arrow.

  As described above, the user rotates a part of the slice plates 11 relative to the other slice plates 11 or removes some of the slice plates 11 from the other slice plates 11 to thereby obtain a plurality of slice plates. Can be partially disassembled.

  Thereby, as shown in FIG. 7A, the user can easily and accurately confirm the shape, size, and position of any part of the medical three-dimensional model 1 before the simulated operation. Further, as shown in FIG. 7B, the shape, size and position of the cut portion of the medical three-dimensional model 1 after the simulated operation can be easily and accurately confirmed. For example, the user can easily and accurately check the cutting depth, the size of the cutting portion, the direction of the cutting portion, the cutting position, and the like. In this way, the user can accurately verify the result of the simulated surgery, and thus can perform practical training of the surgery.

(3) Method for Manufacturing Medical Three-Dimensional Model FIG. 8 is a flowchart showing a method for manufacturing the medical three-dimensional model 1. 9 and 10 are diagrams for explaining a specific example of the method for manufacturing the medical stereo model 1 shown in FIG.

  When manufacturing the medical three-dimensional model 1, first, images of a plurality of cross-sections of a target portion of a living body are acquired (step S11). The images of the plurality of cross sections can be obtained by observing the plurality of cross sections of the target site using, for example, a CT (Computed Tomography) scanner, an MRI (Magnetic Resonance Image) scanner, or an ultrasonic tomography apparatus.

  For example, as shown in FIG. 9A, a plurality of cross sections of a living body are observed using a CT scanner in a vertical range R including a part of the right hip bone B1. Thereby, images of a plurality of cross sections within the range R are obtained. 9B to 9J show image examples of a plurality of cross sections acquired within the range R. In the images of FIGS. 9B to 9J, a cross section of the right hip bone B1 is shown substantially at the center. Further, in the images of FIGS. 9 (i) and (j), a cross section of the right femur B3 is shown together with a cross section of the right hip bone B1.

  Next, as shown in FIG. 8, three-dimensional data of the target part is generated based on the acquired images of the plurality of cross sections (step S12). The three-dimensional data is surface shape data indicating the shapes of the outer surface and the inner surface of the target part. Such three-dimensional data can be created in a format such as the OBJ format or the STL (Standard Triangulated Language) format.

  Next, based on the three-dimensional data of the target site, shape data of a plurality of slice plates 11 representing the shapes of a plurality of cross sections of the target site are generated (step S13). At this time, the thickness of each slice plate 11 is appropriately set.

  Next, based on the shape data of the plurality of slice plates 11, the wooden plate member having the thickness set in step S13 is cut out from the plurality of slice plates 11 (step S14). In addition, a plurality of through holes H are formed in each slice plate 11, and a unique identification number is assigned to each slice plate 11 (step S15). Steps S14 and S15 may be performed in this order, or may be performed in the reverse order. Alternatively, steps S14 and S15 may be performed simultaneously. The cutting of the slice plate 11, the formation of the through holes H, and the assignment of identification numbers are performed using a laser cutter.

  For example, as shown in FIG. 10, a wooden plate member 40 having a certain thickness is prepared. A plurality (24 in this example) of slice plates 11 are cut out from the prepared plate member 40. Further, at least one (two or four in the example of FIG. 10) through holes H are formed in each slice plate 11. Further, an identification number is assigned to each slice plate 11. In the example of FIG. 10, a number surrounded by a dotted line is an example of an identification number. The identification number indicates, for example, the order of lamination for laminating the plurality of slice plates 11 according to a predetermined positional relationship.

  In the example of FIG. 10, the six slice plates 11 at the first stage from the top and the sixth from the left end to the right represent the cross sections of the images shown in FIGS. 9B to 9G, respectively. In the second row, three slice plates 11 from the left end to the third from the right represent cross sections of the images shown in FIGS. 9H to 9J, respectively.

  Finally, as shown in FIG. 8, the plurality of slice plates 11 and the plurality of connection shafts 21 are assembled based on the identification numbers, and the plurality of slice plates 11 are connected by the plurality of connection shafts 21 (step S16). Thereby, the medical three-dimensional model 1 is completed.

(4) Effects According to the medical three-dimensional model 1 according to the present embodiment, the user performs the simulation of the medical three-dimensional model 1 by the same cutting as the actual operation before the actual operation of the target part of the living body. Surgery can be performed. After the simulated surgery, the user rotates a part of the slice plates 11 relative to the other slice plates 11 or removes some of the slice plates 11 from the other slice plates 11 to thereby obtain a plurality of slice plates. The slice plate 11 can be partially disassembled.

  Therefore, even when the cut portion is inside the medical three-dimensional model 1, the user can easily confirm the shape, size, and position of the cut portion after the simulated operation. In addition, by disassembling the plurality of slice plates 11, it becomes possible to confirm the shape of the cross section equivalent to the image of the cross section acquired by the CT scanner or the like with each slice plate 11. As a result, the result of the simulated surgery can be accurately verified, so that practical training of the surgery can be performed. Further, the medical three-dimensional model 1 can be used for explaining the operation to the patient.

  Further, the medical three-dimensional model 1 can be manufactured at low cost and in a short time by cutting and drilling the wooden plate member 40 without using a three-dimensional molding method. Therefore, it is also possible to manufacture the medical three-dimensional model 1 having the same shape as the actual target site for each patient.

  In the present embodiment, each slice plate 11 is connected to another slice plate 11 by at least two connection shafts 21. In this case, relative rotation of the plurality of slice plates 11 is prevented. Thereby, it is possible to easily hold the plurality of slice plates 11 in a state where the target region is shown.

  In the present embodiment, the color of the outer peripheral end face of each of the plurality of slice plates 11 is changed from the color of the base material by cutting out the plurality of slice plates 11 from the wooden plate member using a laser cutter. Therefore, the color of the inner surface and the outer surface of the three-dimensional medical model 1 can be made different from the color of the base material of each slice plate 11 easily and inexpensively without the need for a painting operation. Accordingly, when a part of the medical three-dimensional model 1 is cut by the reamer 80 in the simulated operation, the color of the base material appears in the cut part. As a result, the cut portion can be visually and accurately confirmed without hindering cost reduction.

  In addition, the user can compare the medical three-dimensional model 1 with the target part of the living body by arranging the medical three-dimensional model 1 after the simulated surgery at a position observable when performing an actual operation. . In this case, the user can intuitively recognize the exact shape of the actual target site from the medical three-dimensional model 1 and can intuitively recognize the position and size of the target site to be cut. it can. As a result, the time required for the actual operation can be reduced, and a highly accurate operation can be performed.

[2] Second Embodiment (1) Configuration of Medical Solid Model A medical solid model according to a second embodiment will be described while referring to differences from the medical solid model 1 according to the first embodiment. I do. FIG. 11 is a perspective view of a medical stereo model according to the second embodiment, and FIG. 12 is a plan view showing a part of a plurality of slice plates 11 constituting the medical stereo model 1 of FIG. is there.

  As shown in FIG. 11, the medical three-dimensional model 1 according to the present embodiment includes a plurality of slice plates 11 and connection shafts 211 and 212. FIGS. 12A, 12B, and 12C are plan views of the first, second, and third slice plates 11 from the top among the plurality of slice plates 11 in FIG. 11, respectively. . Also in the present embodiment, each of the plurality of slice plates 11 is assigned an identification number. In FIGS. 11 and 12A to 12C, the identification numbers are not shown.

  As shown in FIG. 11 and FIGS. 12A to 12C, each of the plurality of slice plates 11 has a shape configuration part 110 and an auxiliary part 120. The shape components 110 of the plurality of slice plates 11 respectively represent the shapes of a plurality of cross sections of the target portion of the living body. In addition, in a state where the plurality of slice plates 11 are stacked according to a predetermined positional relationship, the shape configuration unit 110 of the plurality of slice plates 11 changes the shape of the target part of the living body as shown by a thick dotted line in FIG. Represent.

  On the other hand, the auxiliary part 120 of each slice plate 11 is formed so as to protrude from a part of the shape forming part 110 in a predetermined direction. In addition, at least a part of the plurality of auxiliary portions 120 is vertically parallel from the uppermost slice plate 11 to the lowermost slice plate 11 in a state where the plurality of slice plates 11 are stacked according to a predetermined positional relationship. Linearly along the major axis. These auxiliary parts 120 are provided at positions corresponding to parts of the target part of the living body that are not cut in actual surgery.

  In each of the auxiliary portions 120 of the plurality of slice plates 11, a through hole H1 is formed so as to communicate linearly from the uppermost slice plate 11 to the lowermost slice plate 11. In each of the auxiliary portions 120 of the plurality of slice plates 11, a through hole H2 is formed so as to communicate linearly from the uppermost slice plate 11 to the lowermost slice plate 11.

  As shown in FIG. 11, the connection shaft 211 is inserted through the plurality of through holes H1 with a certain clearance, and the connection shaft 212 is inserted through the plurality of through holes H2 with a certain clearance. Thereby, the plurality of slice plates 11 are connected to each other so as to maintain a predetermined positional relationship.

  Also in the present embodiment, the medical three-dimensional model 1 is manufactured by the same manufacturing method as the medical three-dimensional model 1 according to the first embodiment. Therefore, the plurality of slice plates 11 are cut out from a wooden plate member having a certain thickness using a laser cutter.

(2) Effect According to the three-dimensional medical model 1 according to the present embodiment, the user can disassemble the plurality of slice plates 11 by pulling out the connection shafts 211 and 212. Further, the user pulls out the connection shaft 212 (or the connection shaft 211), and as shown by a thick solid line arrow in FIG. (Or the connection shaft 212). Therefore, the user can easily and accurately confirm the shape, size, and position of a desired portion in the target portion of the living body.

  In the present embodiment, through holes H1 and H2 for connecting the plurality of slice plates 11 are formed in the auxiliary part 120 instead of the shape component part 110. Therefore, even when the target part of the living body has a complicated shape, the plurality of slice plates 11 are connected by a small number of connection shafts 211 and 212, and at least a part of the slice plates 11 is connected to another slice plate 11. On the other hand, it is easy to make the structure rotatable.

  Since the medical three-dimensional model 1 according to the present embodiment is manufactured by the same manufacturing method as the medical three-dimensional model 1 according to the first embodiment, it can be manufactured inexpensively and in a short time.

[3] Other Embodiments (1) In the above embodiment, the plurality of slice plates 11 are manufactured by processing a wooden plate-shaped member, but the present invention is not limited to this. As a material for the plurality of slice plates 11, a resin material such as polyurethane can be used instead of wood. By using a resin material as the material of the plurality of slice plates 11, the medical three-dimensional model 1 that is lightweight and easy to process can be realized.

  Further, as a material of the plurality of slice plates 11, a transparent material such as transparent glass or transparent resin can be used instead of wood. In this case, the user can easily and accurately check the internal state of the medical three-dimensional model 1 through the transparent slice plate 11 before, during, and after the simulated surgery. In particular, when attaching another member such as an artificial joint to the medical three-dimensional model, the user can easily and accurately check the attachment state of the other member through the transparent slice plate 11.

  (2) In the above embodiment, all of the plurality of slice plates 11 are manufactured by processing a wooden plate-shaped member, but the present invention is not limited to this. Some slice plates 11 among the plurality of slice plates 11 may be formed of materials different from those of the other slice plates 11. Wood, a resin material, a transparent material, or the like can be used as the plurality of different materials.

  In this case, by using a material suitable for each of the plurality of portions of the medical three-dimensional model 1, cutting can be facilitated, the state after cutting can be easily confirmed, or the cost can be reduced.

  For example, the slice plate 11 to be cut out of the plurality of slice plates 11 may be formed of a low-strength material such as polyurethane which is easy to cut, and the other slice plates 11 may be formed of an inexpensive material such as wood. Good. As a result, the cost can be reduced as well as the cutting is facilitated. Alternatively, of the plurality of slice plates 11, the slice plate 11 to be cut may be formed of a transparent material, and the other slice plates 11 may be formed of an inexpensive material such as wood. This makes it easy to check the state after cutting and can reduce the cost.

  Further, as the plurality of different materials, a plurality of materials having different colors may be used. For example, as the material of the plurality of slice plates 11, a plurality of trees having different colors of the base material may be used. Further, as a material of the plurality of slice plates 11, a plurality of acrylic resins having different colors from each other may be used. In these cases, by using the slice plates 11 of colors suitable for a plurality of portions of the medical three-dimensional model 1, for example, it is possible to easily confirm a cut portion.

  (3) In the above embodiment, the plurality of slice plates 11 are cut out from the wooden plate member 40 by the laser cutter, but the present invention is not limited to this. The plurality of slice plates 11 may be cut out by cutting using a cutting tool instead of a laser cutter, or may be cut out by water jet cutting.

  When the slice plate 11 is cut out from the plate member 40 by cutting or water jet cutting, the color of the outer peripheral end face of each of the plurality of slice plates 11 does not change from the color of the base material. As described above, when a plurality of sliced plates 11 are cut out from the plate-shaped member 40 and the cut surfaces do not change color, after the plurality of sliced plates 11 are cut out, the outer peripheral end surface (cut surface) of each sliced plate 11 is cut. May be painted in a color different from the color of the base material. This makes it possible to visually and accurately confirm the state of the cut portion after the simulated operation.

  (4) In the second embodiment, all of the plurality of slice plates 11 are connected by the connection shafts 211 and 212, but the present invention is not limited to this. In the medical three-dimensional model 1 according to the second embodiment, one of the connection shafts 211 and 212 may not be provided. In this case, all of the plurality of slice plates 11 are connected by one connection shaft. Thereby, the number of parts of the medical three-dimensional model 1 is reduced, and the assembly of the medical three-dimensional model 1 is facilitated.

  (5) In the above embodiment, all of the plurality of slice plates 11 are detachably connected by the plurality of connection shafts 21, 211, 212, but the present invention is not limited to this. Some slice plates 11 of the plurality of slice plates 11 constituting the three-dimensional medical model 1 may be fixed to each other. For example, some slice plates 11 that are not cut by the simulated surgery may be fixed to each other using an adhesive or the like. In this case, handling of the medical three-dimensional model 1 becomes easy.

(6) In the above-described embodiment, an example has been described in which all of the medical three-dimensional model 1 is mainly configured by the plurality of slice plates 11, but the present invention is not limited to this. A portion of the medical three-dimensional model 1 that is not cut by the simulated surgery, that is, a portion that does not need to be disassembled after the simulated surgery, may be configured by an integrally molded product. The integrally molded article can be produced by, for example, a three-dimensional molding method or a processing method using an NC (Numerical Control) machine tool. In this case, handling of the medical three-dimensional model 1 becomes easy.

  (7) In the second embodiment, each of the plurality of slice plates 11 has one auxiliary portion 120, but the present invention is not limited to this. Each of the plurality of slice plates 11 may have two auxiliary portions 120 that are separated from each other. In this case, a through hole H1 may be formed in one auxiliary portion 120 and a through hole H2 may be formed in the other auxiliary portion 120.

  Furthermore, each of the plurality of slice plates 11 may have three or more auxiliary portions 120 that are separated from each other. In this case, one or more through-holes may be formed in each auxiliary part 120, and the connecting shaft may be inserted into each through-hole of each auxiliary part 120.

  (8) In the second embodiment, the through holes H1 and H2 are formed in the auxiliary portions 120 of the plurality of slice plates 11, but the present invention is not limited to this. A through hole H1 may be formed in the auxiliary portion 120 of the plurality of slice plates 11, and a through hole H2 may be formed in the shape forming portion 110 of the plurality of slice plates 11.

  (9) In the above embodiment, the medical three-dimensional model 1 representing a part of the pelvis B0 of the living body has been described. However, the target part of the living body represented by the medical three-dimensional model 1 according to the present invention is the above-described one. It is not limited to the example. The medical three-dimensional model 1 may be configured to represent a biological organ such as a brain, a heart, a liver, or a kidney.

  INDUSTRIAL APPLICABILITY The present invention can be effectively used for a medical three-dimensional model representing a target part of a living body including at least a part of a bone or an organ.

DESCRIPTION OF SYMBOLS 1 Medical three-dimensional model 11, 11A, 11B Slice board 21, 211, 212, 21a, 21b Connection shaft 40 Plate-shaped member 80 Reamer 90 Artificial hip joint 91 Socket 92 Artificial head 93 Stem 110 Shape constituent part 120 Auxiliary part B0 Pelvis B1 Right Hip B2 Left Hip B3 Right Femur B4 Left Femur B5 Opening B11 Acetabulum B31 Femoral Head H, H1, H2 Through Hole

Claims (9)

A medical three-dimensional model of a target portion of a living body including at least a part of a bone or an organ,
A plurality of slice plates each having a shape component and a connection auxiliary portion each representing a shape of a plurality of cross sections of the target portion and stacked,
The shape constituting portions of the plurality of slice plates represent the shape of the target portion in a stacked state,
At least a portion of the slice plate of the plurality of slice plate is in a state where the plurality of slices plates are connected to each other by the axis of the stacking direction in the auxiliary section, around the said stacking direction axis of the auxiliary unit, A medical stereo model that is configured to be rotatable relative to other slice plates. The medical three-dimensional model according to claim 1, wherein the at least some slice plates are detachably provided from the other slice plates by removing the at least some slice plates from the axis in the stacking direction . When the at least some slice plates are connected at the auxiliary portion in the stacking direction axis and the auxiliary portion is connected at a position different from the stack direction axis in the auxiliary portion, the at least some slice plates are connected to the other portion. The medical three-dimensional model according to claim 1, wherein the medical three-dimensional model is prevented from rotating relative to the slice plate. When the at least some slice plates are connected at the axis of the auxiliary portion in the stacking direction and are connected at the shape forming portion, the at least some slice plates are relative to the other slice plates. The medical three-dimensional model according to any one of claims 1 to 3, which is prevented from rotating. The medical three-dimensional model according to any one of claims 1 to 4, wherein each of the at least some slice plates has a plurality of the auxiliary parts that are separated from each other. 6. The at least some slice plates are prevented from rotating relative to the other slice plates when the at least some slice plates are connected at the plurality of auxiliary portions. Medical three-dimensional model. The medical three-dimensional model according to any one of claims 1 to 6, wherein a color of an outer peripheral end face of each of the plurality of slice plates is different from a color inside the plurality of slice plates. The medical three-dimensional model according to any one of claims 1 to 7, wherein the auxiliary unit is provided at a position corresponding to a part of the target part of the living body that is not cut in an actual operation. The medical three-dimensional model according to any one of claims 1 to 8, wherein the target site includes at least a part of a bone.

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