Model for preoperative verification of a dental treatment plan, verification appliance, method for manufacturing a verification model, verification system, and verification program

Abstract

The present invention provides a model for preoperative verification of a dental treatment plan, a verification tool, a method for manufacturing a verification model, a verification system, and a verification program. The model of the present invention has a model body, a hole specification portion, and a target model portion. A space is formed between the hole specification portion and the target model portion, and the space enables visual confirmation of a range in which a front end of a surgical tool can reach from the hole specification portion toward the target model portion, and enables visual confirmation of a range in which the front end of the surgical tool can reach from the hole specification portion in a tooth arrangement direction and a direction intersecting the tooth arrangement direction.

Description

Technical Field

[0001] This invention relates to a model for preoperative verification of dental treatment plans, an instrument for preoperative verification of dental treatment plans, a method for manufacturing the model for preoperative verification of dental treatment plans, a system for preoperative verification of dental treatment plans, and a procedure for preoperative verification of dental treatment plans. Background Technology

[0002] For example, in implant treatment, the dentist, acting as the surgeon, typically uses a dental CT scan to obtain three-dimensional images of the patient's maxilla and / or mandible, including the treatment location. Based on these three-dimensional images, the dentist can determine the location of the maxillary cavity, the posterior superior alveolar artery, and the greater palatine artery in the patient's maxilla, or the location of the inferior alveolar artery and the inferior alveolar nerve in the patient's mandible, in addition to knowing the treatment location before surgery.

[0003] Furthermore, in implant treatments, for example, if the patient is in the maxilla, the dentist will perform the procedure by ensuring that the tip of the drill or other hole-forming instrument does not reach the patient's maxillary cavity mucosa, posterior superior alveolar artery, or greater palatine artery, as a predetermined non-reaching (non-contact) target. Conversely, if the patient is in the mandible, the dentist will perform the procedure by ensuring that the tip of the drill or other hole-forming instrument does not reach the patient's inferior alveolar artery or inferior alveolar nerve, as a predetermined non-reaching target.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Publication No. 2017-508595

[0007] Patent Document 2: U.S. Patent Application Publication No. 2012 / 0046914

[0008] The problem to be solved by the present invention

[0009] For example, a risk in implantation therapy is that arteries or nerves, which are not the target, cannot be visually observed during surgery. Summary of the Invention

[0010] The purpose of this invention is to provide a model for preoperative verification of dental treatment plans, a preoperative verification instrument for dental treatment plans, a method for manufacturing the model for preoperative verification of dental treatment plans, a preoperative verification system for dental treatment plans, and a preoperative verification procedure for dental treatment plans. This allows the dentist, after creating a treatment plan and before using actual surgical instruments such as hole-forming instruments, to verify the positional relationship between the tip of the surgical instrument and non-target locations such as the maxillary cavity mucosa, posterior superior alveolar artery, and greater palatine artery of the patient's maxilla, or the inferior alveolar artery and inferior alveolar nerve of the mandible.

[0011] The dental treatment plan preoperative verification model of one aspect of the present invention has a model body, a hole specification portion, and a target model portion. The model body is formed based on the patient's jaw and mimics (imprints) at least a portion of the treatment target area of ​​the patient's jaw in the same size and shape. The hole specification portion is provided in the model body and specifies holes corresponding to the recesses used for embedding implants in the treatment target area. The target model portion mimics a target adjacent to or embedded in the alveolar bone of the treatment target area. When a surgical instrument, positioned in the same positional relationship as the treatment target area and used during treatment, passes through the hole specification portion, it is not in contact with the tip of the surgical instrument; or, when the surgical instrument is moved closer to the treatment target area than in the positional relationship between the treatment target and the target and passes through the hole specification portion, it contacts the tip of the surgical instrument. A space is formed between the hole specification section and the target model section. This space allows for visual confirmation of the range that the tip of the surgical instrument can reach from the hole specification section to the target model section, and also allows for visual confirmation of the range that the tip of the surgical instrument can reach from the hole specification section in the direction of tooth arrangement and in the direction intersecting the direction of tooth arrangement. Attached Figure Description

[0012] Figure 1 This is a block diagram of the dental treatment planning pre-verification system of the first and second embodiments.

[0013] Figure 2 This is a schematic diagram showing one example of an implant.

[0014] Figure 3 This is a schematic diagram illustrating an example of a hole-forming apparatus.

[0015] Figure 4A This is a schematic diagram of a model used for prior verification of a dental treatment plan according to the first embodiment.

[0016] Figure 4B It means from and Figure 4A A schematic diagram of the model viewed from different directions.

[0017] Figure 4C This is a schematic diagram of a model used for prior verification of a dental treatment plan, representing a variation of the first embodiment.

[0018] Figure 5 This is a schematic diagram showing the planting guide of the first embodiment.

[0019] Figure 6 This is a flowchart representing the treatment plan for implantation therapy.

[0020] Figure 7 It means to continue Figure 6 The flowchart of the treatment plan for implantation therapy.

[0021] Figure 8 It is a diagram representing the state of a third three-dimensional image that overlaps with the first three-dimensional image representing the lower alveolar bone and marks the position that does not reach the target.

[0022] Figure 9 It means in Figure 8 The image shows the state of the fourth three-dimensional image of the implant, which is further superimposed on the previous one.

[0023] Figure 10 It means in Figure 9 The image above further overlaps the second three-dimensional image data of the teeth and gums with the fifth three-dimensional image of the hole-forming instrument.

[0024] Figure 11 This is a diagram representing the sixth three-dimensional image of the planting guide.

[0025] Figure 12 It is a schematic diagram showing the gums, teeth, lower alveolar bone, implant, and non-target area when an implant guide has been installed in the lower jaw.

[0026] Figure 13 It is a schematic diagram showing the gums, teeth, lower alveolar bone, foramen forming device, and non-target area when an implant guide has been installed in the lower jaw.

[0027] Figure 14 It means in Figure 9 The image above further overlaps with the state of the sixth three-dimensional image of the planting guide.

[0028] Figure 15 It means from Figure 14 The image is a diagram in which the states of the first and second three-dimensional images have been removed.

[0029] Figure 16It is a diagram representing a portion of the surface images of the second, third, fourth, and fifth three-dimensional images.

[0030] Figure 17 It means to Figure 16 The surface image shown is obtained by superimposing the surface images and subtracting the fourth and fifth three-dimensional images.

[0031] Figure 18A This is a schematic diagram showing the state of inserting the hole-forming device into the guide hole of the planting guide after the planting guide has been assembled on the model.

[0032] Figure 18B This is a schematic diagram showing the state of the hole-forming device being inserted into the hole of the model.

[0033] Figure 19 This is a schematic diagram showing a second variation of the first embodiment, in which the second three-dimensional image and the third three-dimensional image are superimposed on the first three-dimensional image of the jaw.

[0034] Figure 20 This is a schematic diagram showing the first modified example with an implant guide installed in the mandible, including the gingiva, teeth, lower alveolar bone, hole-forming device with handle, and non-targeting portion.

[0035] Figure 21 This is a diagram showing the state of the second variation, where a third three-dimensional image marking the non-target position, a fourth three-dimensional image of the teeth themselves, and a fifth three-dimensional image of the hole-forming device overlap on a first three-dimensional image representing the lower alveolar bone.

[0036] Figure 22 This diagram shows the state of the implant superimposed on the first three-dimensional image of the maxillary alveolar bone, maxillary cavity, posterior maxillary alveolar artery, and greater palatine artery, as well as the fifth three-dimensional image of the hole-forming device, according to the second embodiment.

[0037] Figure 23 It is a diagram representing the state of the first to fourth three-dimensional images of the upper jaw that overlap.

[0038] Figure 24 It means in Figure 23 The diagram shown overlaps with the sixth three-dimensional image data, and the state of the first three-dimensional image has been removed.

[0039] Figure 25 It is a graph representing surface image data of a portion of the first three-dimensional image, the second three-dimensional image, the third three-dimensional image, the fourth three-dimensional image, and the fifth three-dimensional image.

[0040] Figure 26 It means to Figure 25The surface image shown is obtained by subtracting the surface image from the fourth and fifth three-dimensional images after the surface image data are superimposed.

[0041] Figure 27 Observing from different directions Figure 26 The diagram shown is of the upper jaw.

[0042] Figure 28 It is a schematic diagram showing the positional relationship between the tooth and the cavity in the maxilla during surgery to implant an implant in the maxilla.

[0043] Figure 29 It means to continue Figure 28 A schematic diagram showing the positional relationship between the tooth and the maxillary cavity during surgery to implant an implant in the maxilla.

[0044] Figure 30 It means in Figure 23 The image shows the state of the maxillary cavity floor mucosa overlapping the maxillary cavity in the second three-dimensional image.

[0045] Figure 31 This is a schematic diagram showing a series of processing states of a three-dimensional image of a model relative to the upper jaw, representing a variation of the second embodiment. Detailed Implementation

[0046] The preoperative verification system for dental treatment plans (a model-making system for verifying dental treatment plans after they have been created and before surgery) 10 of this embodiment constitutes part of a series of operations, such as acquiring various data about a patient, creating a treatment plan for implantation treatment, and performing surgery on the patient. This system 10 is used, for example, when performing a series of operations, starting with acquiring data about the affected area of ​​a patient, creating a dental treatment plan for that patient, and then using a model (a model for preoperative verification of the dental treatment plan) 100 that outputs a model of the actual patient to perform preoperative verification of the dental treatment plan. The acquisition of data about the affected area of ​​a patient and the output of the model 100 can also be performed using a different system than this system 10. In this embodiment, the model 100 is a physical-size model.

[0047] (First Implementation)

[0048] In the first embodiment, the system 10 is used to implant 30 selected from a plurality of devices as implants (see reference 10). Figure 2 An example of implant treatment placed in the patient's lower jaw will be explained.

[0049] like Figure 1As shown, the preoperative verification system for dental treatment planning (hereinafter referred to as the system) 10 includes a control device 12, a first scanner 14, a second scanner 16, a display unit 18, an operation unit (instruction input unit) 20, a storage device 22, a 3D printer 24, and a grinder 26.

[0050] The control device 12 controls the first scanner 14, the second scanner 16, the display unit 18, the operation unit 20, the storage device 22, the 3D printer 24, and the grinding machine 26. The control device 12 may be a computer, for example. The control device 12 includes, for example, a processor such as a CPU or MPU, RAM, ROM, and an I / O interface. The control device 12, for example, uses one or more processors such as a CPU to expand a control program stored in a memory such as ROM into RAM and executes appropriate processing for the display unit 18, the operation unit 20, the storage device 22, the first scanner 14, the second scanner 16, the 3D printer 24, and the grinding machine 26. Alternatively, the control device 12, for example, uses one or more processors such as a CPU to read a program via a network and executes appropriate processing for the display unit 18, the operation unit 20, the storage device 22, the first scanner 14, the second scanner 16, the 3D printer 24, and the grinding machine 26. The control device 12 controls each component by reading and executing a program pre-stored in memory through a processor, thereby implementing functions such as image processing through software.

[0051] The first scanner 14 is, for example, a dental CT scanner. The first scanner 14 acquires three-dimensional images (e.g., DICOM data) of the patient's jaw teeth, bones, and internal structure, and outputs them to the control device 12. The control device 12 stores the three-dimensional images of the patient's jaw teeth, bones, and internal structure in a storage device 22. The second scanner 16 is, for example, an intraoral scanner. The second scanner 16 acquires three-dimensional images (e.g., STL data) of the patient's jaw teeth and gums (gum), and outputs these three-dimensional images to the control device 12. The control device 12 stores the three-dimensional images of the patient's jaw teeth and gums in the storage device 22.

[0052] Display unit 18 is, for example, a liquid crystal display, an organic EL display, or various other displays. Display unit 18 displays patient-related images acquired by the first scanner 14 and the second scanner 16 and output to the control device 12, and displays various information. Control device 12 can also read the patient's three-dimensional image stored in storage device 22 and display it on display unit 18.

[0053] The operation unit 20 inputs instructions to the control device 12. The operation unit 20 includes devices such as a keyboard and mouse.

[0054] Storage device 22 stores various patient data (e.g., three-dimensional images of the mandibular teeth, bones, and internal structure (DICOM data), and three-dimensional images of the patient's mandibular teeth and gum surfaces (e.g., STL data). Storage device 22 stores, for example... Figure 2 Various three-dimensional images (implant data) of the implant 30 shown 22a, Figure 3 Various three-dimensional images (hole forming tool setting data) 22b of the drill bit and other hole forming tools 40 shown.

[0055] When the control device 12 reads various three-dimensional images 22a of the implant 30 and various three-dimensional images 22b of the hole-forming device 40 via the network, it is not necessary to store the various three-dimensional images 22a of the implant 30 and various three-dimensional images 22b of the hole-forming device 40 in the storage device 22. That is, the control device 12 can also use, for example, a database (implant data 22a and hole-forming device setting data 22b) on a server instead of the storage device 22. The control device 12 is able to read various data from the server.

[0056] like Figure 3 As shown, the actual hole-forming device 40 includes, for example, a main body 42 with an opening, a rod 44, a sleeve 46, and a stop 48. The main body 42 and the rod 44 are integrated by integral molding or the like. The rod 44 is fixed to a machine head (not shown). Therefore, the main body 42 and the rod 44 rotate about a predetermined rotation axis. The sleeve 46 covers the outside of the main body 42 and engages or locks with the guide hole (through hole) 210 of the auxiliary device 200 such as the planting guide, which will be described later. The end face 48a of the stop 48 on the main body 42 side abuts against a predetermined surface 220 of the guide hole 210 of the auxiliary device 200, for example, at a predetermined distance from the machine head.

[0057] 3D printers 24 are based on 3D images of the patient's jaw and 3D images created by dental treatment planners such as dentists. Figure 4A and Figure 4B The model 100 shown is used for pre-verification of dental treatment. The 3D printer 24 is preferably owned by the dentist, who operates the 3D printer 24, but it can also be operated by a professional who receives data from the dentist and outputs the model.

[0058] Furthermore, the 3D printer 24 of this embodiment is preferably configured such that, during output, it automatically shapes the support members (the base (base 140 and the support column 150, described later) together with the model body 110 having the hole portion (hole specification portion) 130 and the target model portion 120. Dentists and others can also appropriately arrange the support members on the fifth three-dimensional image 55, described later, before the 3D printer 24 outputs.

[0059] Model 100 has a model body 110, a target model portion 120, and a hole portion (hole defining portion) 130. The model body 110 is shaped to be the same size and shape as the treatment target area and its surroundings in the patient's actual mandible. The model body 110 does not include the entire mandible, but only the treatment target area and its surroundings. The model body 110 is preferably formed to be the same size as, or larger than, the area where the auxiliary device (implant guide) 200 described later is fixed to, the treatment target area and its surroundings in the patient's actual mandible. Model 100 preferably does not have a portion corresponding to a large portion of the patient's lower alveolar bone. A positional relationship is formed between the model body 110 and the target model portion 120 that is the same as the positional relationship between the treatment target area and the target (non-contact target or contact target) in the patient's actual mandible. This same positional relationship means that the portion related to the surgery at the treatment target area is formed to be the same size and shape as the treatment target area and its surroundings in the patient's actual mandible. The hole portion 130 is defined by various parameters of the implant 30 and the hole forming device 40 described later. The hole 130 is formed according to the setting of parameters related to the shape (e.g., length, outer diameter), angle, and position of the implant 30 or hole forming device 40 embedded in the hole 130 at the treatment site.

[0060] The model body 110 has a defined surface 135 for forming the edge of the hole 130. The defined surface 135 is the surface of the gingiva or lower alveolar bone. When the end face 46a of the sleeve 46 of the hole forming appliance 40 abuts against the defined surface 135, the body 42 of the hole forming appliance 40 is restricted from this position toward the inner side of the gingiva and lower alveolar bone. Therefore, the defined surface 135 of the model body 110 defines the position reached by the front end of the hole forming appliance 40.

[0061] The target model portion 120 is preferably supported on the model body 110 by a main support column 160. A space (space definition portion) 145 is formed between the hole portion 130 and the target model portion 120. This space 145 allows for visual confirmation of the reachable range of the front end of the hole forming instrument 40 from the hole portion 130 toward the target model portion 120, and allows dentists or others to visually confirm from the outside of the model 100 the reachable range of the front end of the hole forming instrument 40 from the hole portion 130 in the tooth alignment direction and in the direction intersecting the tooth alignment direction. In other words, the space 145 between the model body 110 and the target model portion 120 is formed to allow dentists or others to confirm whether the front end of the body 42 of the hole forming instrument 40 is in contact with the target model portion 120. In this embodiment, the main support column 160 and the target model portion 120 are formed as generally L-shaped components. The main support 160, together with the model body 110, the target model part 120, etc., is formed as part of the frame that divides the space 145.

[0062] Model 100 also includes: a base (base) 140 that supports the target model part 120 and is disposed on the opposite side of the model body 110; and a support (support member) 150 that connects the model body 110 and the base 140.

[0063] Furthermore, the position between the model body 110 and the target model portion 120, corresponding to the cheek side and / or lip side of the alveolar bone, is preferably formed as a wallless window portion without walls, so that the target model portion 120 can be approached from the position corresponding to the cheek side and / or lip side of the alveolar bone.

[0064] The grinding machine 26 cuts out shapes based on a three-dimensional image of the patient's jaw and a three-dimensional image created by the dentist. Figure 5 The auxiliary device (implant guide) 200 is shown. The grinding machine 26 is preferably owned by the dentist, who operates the grinding machine 26, but it can also be operated by a professional who receives data from the dentist and outputs it to the auxiliary device 200.

[0065] In practice, the dental instrument 200 used during dental treatment is made of a medically approved resin material that is durable enough to withstand dental treatment. The dental instrument 200 can also be manufactured by a 3D printer 24. In this case, the instrument 200 is formed from a medically approved material. Additionally, the dental instrument 200, which is not used during dental treatment but is used with the model 100 for dentist confirmation, is preferably made of the same material as the model 100. Since the model 100 is not used for actual treatment, it can be formed with appropriate material and appropriate precision as long as the relationship between the specified surface 135 and the target model portion 120 is maintained.

[0066] The assistive device 200 is configured to conform to the surface shape of a CT image and / or a three-dimensional image of the surface of the teeth and gums at the patient's treatment site. The assistive device 200 is used after being secured with screws to teeth, gums, or jawbone near the gums at the patient's treatment site. The assistive device 200 is fixed to the jaw to prevent movement relative to the jaw. The assistive device 200 is used to form a predetermined recess in the gums and alveolar bone, and to correctly form a recess in the body 42 of the hole-forming device 40 for inserting an implant 30 into the predetermined recess.

[0067] The assistive device 200 is used not only during dental treatment but also in conjunction with the model 100 used for preoperative verification of dental treatment planning. For example... Figure 18A As shown, the combination of the model 100 and the auxiliary instrument 200 used for preoperative verification of dental treatment plan is used as the preoperative verification instrument 260 for dental treatment plan.

[0068] Figure 5The auxiliary device 200 shown has a main body 205 and a guide hole 210.

[0069] As described above, the assistive device 200 is used after being fixed with screws to the teeth, gums, and jawbone near the patient's treatment site. Therefore, the main body 205 is used as a positioning part that defines the reference position of the teeth, gums, and jawbone. The illustration shows an example where the main body 205 is fixed to the patient's oral cavity area, for example, along one or more teeth, but the patient's mandibular side may also be completely edentulous. For example, the main body 205 may be configured to connect to a smaller part of the patient's oral cavity, such as only one or two teeth, only bone, or any combination thereof.

[0070] When the guide hole 210 is properly installed on the patient's mandibular teeth and gums with the main body 205, the direction, shape (length, outer diameter), angle, and position of the recess formed by the main body 42 of the hole-forming appliance 40 are defined. The auxiliary appliance 200 has a defined surface 220 that forms the edge of the guide hole 210. The defined surface 220 is the surface opposite to the surface opposite to the gums or lower alveolar bone. When the end face 48a of the stop 48 abuts against the defined surface 220, the main body 42 of the hole-forming appliance 40 is restricted from that position toward the inside of the gums and lower alveolar bone. Therefore, the position reached by the front end of the hole-forming appliance 40 is defined by the defined surface 220 of the auxiliary appliance 200.

[0071] Furthermore, the guide hole 210 of the auxiliary instrument 200 can accommodate not only the hole-forming instrument 40, but also other surgical instruments such as an electrosurgical scalpel for hemostasis. In this case, the defining surface 220 restricts the insertion direction, angle, and position of the electrosurgical scalpel. Therefore, the defining surface 220 can serve not only as a limiting surface for the hole-forming instrument 40, but also as a limiting surface for other surgical instruments. Thus, the auxiliary instrument 200 is used as a position-limiting body for surgical instruments. The guide hole 210 is typically formed as a circular hole.

[0072] In addition, in the system 10 of this embodiment, the dentist can create the assistive device 200 as a three-dimensional image (data representing a three-dimensional shape), and can use a 3D printer 24 or a grinder 26 to model a physical object that is suitable for the shape and size of the patient's jaw.

[0073] The control device 12 in this embodiment stores an image display program, an image processing program, an output program, etc.

[0074] The image display program causes the display unit 18 to display data acquired by the first scanner 14 and the second scanner 16. The image processing program, based on the same coordinate axis, aligns the image displayed by the image display program (image data) with various data stored in the storage device 22. The image display program causes the display unit 18 to display data aligned using the same coordinate axis by the image processing program. Additionally, the image display program causes the display unit 18 to display a three-dimensional image created based on the dentist's intention. The output program outputs the surface data (data representing the three-dimensional shape (three-dimensional image data), hereinafter referred to as surface data) of the three-dimensional image and object (e.g., model 100 and assistive device 200) created using the image processing program and based on the dentist's intention. The output program can output surface data that allows the 3D printer 24 or grinder 26 to model the object.

[0075] The dentist uses the operating unit 20 to input various instructions to the control device 12, such as following... Figure 6 and Figure 7 The process shown is for creating a treatment plan for implantation therapy.

[0076] The control device (computer) 12 uses, for example, a first scanner 14 such as a dental CT scanner to acquire three-dimensional images (e.g., DICOM data) of the patient's mandibular teeth, bones, and the interior of the bones, and stores the acquired three-dimensional images in the storage device 22. This is used as the first three-dimensional image (three-dimensional image data) 51. Additionally, the control device (computer) 12 uses, for example, a second scanner 16 such as an intraoral scanner to acquire three-dimensional images (e.g., STL data) of the surfaces of the teeth and gums, and stores the acquired three-dimensional images in the storage device 22. This is used as the second three-dimensional image (three-dimensional image data) 52, i.e., the first surface data. The second three-dimensional image 52 (first surface data) includes the treatment site and its surrounding area. Based on the dentist's instructions, the control device (computer) 12 loads the first three-dimensional image 51 and the second three-dimensional image 52 into appropriate software (application application) (step S1). Even if the data formats of the first three-dimensional image 51 and the second three-dimensional image 52 are different, the software can read both the data of the first three-dimensional image 51 and the second three-dimensional image 52.

[0077] In addition, the "dentist's instructions" in this embodiment include, for example, various instructions such as simply clicking the computer mouse.

[0078] The dentist, for example, checks the first three-dimensional image 51 on the display screen of the display unit 18, and comprehensively judges the feasibility of implantation treatment in a patient's treatment site based on various other conditions (step S2). The procedure when the dentist determines that implantation treatment can be performed (step S2 - Yes) will be described below. Furthermore, when the dentist determines that implantation treatment cannot be performed (step S2 - No), the treatment plan preparation process ends.

[0079] Alternatively, if the second three-dimensional image 52 is not used to determine the feasibility of implantation treatment, the acquisition of three-dimensional images of the tooth and gingival surfaces using the second scanner 16 can be performed after the process in step S2.

[0080] like Figure 8 As shown, on the screen of the software-based display unit 18, the control device 12 determines the positions of the inferior alveolar artery and inferior alveolar nerve in a first three-dimensional image 51 representing the mandible (inferior alveolar bone) based on the dentist's instructions. The positions of the inferior alveolar artery and inferior alveolar nerve are non-reachable (non-contact) targets, for example, those where the hole 70 for implanting the implant 30 is not formed during the implantation treatment and is not reached by the front end of the main body 42 of the device 40. Then, based on the dentist's instructions, the control device 12 marks the positions of the non-reachable targets on the screen of the display unit 18 (step S3, first processing). At this time, based on the dentist's instructions, the control device 12 marks the feature points of the non-reachable targets on the screen of the display unit 18, thereby forming the non-reachable targets in three dimensions. Then, based on the dentist's instructions, the control device 12 generates a three-dimensional image 120a of the non-reachable targets as a third three-dimensional image (fourth surface data) 53. The third three-dimensional image 53 includes a three-dimensional image 160a of the main support 160. That is, the third three-dimensional image 53 includes the three-dimensional image 120a that does not reach the target and the three-dimensional image 160a of the main support 160. Therefore, determining the target includes determining the three-dimensional image 160a of the main support 160 that is connected to the second three-dimensional image 52 (the image based on the first surface data). When the three-dimensional image 160a is formed as the main support 160 of the model 100, it is marked at a position that will not become an obstacle when the dentist approaches the target model part 120 by passing the front end of the hole forming instrument 40 through the hole portion 130.

[0081] The three-dimensional image 160a of the main support 160 can also be set after the three-dimensional image 100a of the model 100 is created, and is used for the three-dimensional image 160a of the main support 160 to maintain the positional relationship between the three-dimensional image 110a of the model body 110 and the three-dimensional image 120a of the target model part 120.

[0082] Furthermore, if the three-dimensional image 160a of the main support 160 is automatically produced, for example, by the function of the 3D printer 24, it is not necessary to determine the three-dimensional image 160a.

[0083] The control device 12 can also determine the position of the inferior alveolar artery, which is a non-target, and the lingual surface (wall) of the inferior alveolar bone near the inferior alveolar nerve in the first three-dimensional image 51 based on the dentist's instructions. Furthermore, the control device 12 can also mark the position of the lingual surface as a non-target in the third three-dimensional image 53 on the screen of the display unit 18 based on the dentist's instructions.

[0084] Control device 12 is based on the dentist's instructions, such as Figure 9 As shown, on the display unit 18, the shape (e.g., length, outer diameter), angle, and position of an implant that mimics the implant 30 are set or installed at the treatment position (step S4). Installation refers to, for example, importing three-dimensional data obtained by a dentist using a 3D scanner into the system 10. The angle of the implant refers to, for example, the setting direction relative to the patient's treatment position.

[0085] Additionally, as an implant, three-dimensional image data corresponding one-to-one with the implant is used, containing information about the same shape and size as the actual medically approved implant 30. At this time, the dentist considers the relationship between the shape of the abutment and the superstructure (crown) installed on the implant 30. For example, the dentist selects an implant that matches the settings from the three-dimensional images 22a of implants stored in the storage device 22. The fourth three-dimensional image (second surface data) 54 of the implant selected by the dentist is provided, for example, by the manufacturer of the implant 30. If it is not provided by the manufacturer of the implant 30, the dentist can also create the fourth three-dimensional image 54 of the implant themselves. The control device 12 stores the fourth three-dimensional image 54 of the implant created by the dentist in the storage device 22.

[0086] The dentist can select the implant 30 and appropriately set the angle and position of the implant 30 relative to the mandible according to the patient. At this time, the dentist can easily reselect the implant and try implants of different lengths and outer diameters to suit the patient's needs.

[0087] Control device 12 is based on the dentist's instructions, such as Figure 10As shown, based on the depth, diameter, angle, and position of the recess 70 used for embedding the selected implant, an appropriate hole-forming instrument is selected from a drilling rig set of one or more manufacturers used for patient treatment (second process). Additionally, as the hole-forming instrument, a three-dimensional image corresponding one-to-one with this instrument is used, containing information about the same shape and size as the actual medically approved hole-forming instrument 40. Dentists can typically select the hole-forming instrument 40 recommended by the manufacturer of the selected implant 30, but may also use a hole-forming instrument 40 from a different manufacturer than the selected implant 30. Based on the dentist's instructions, the control device 12 selects a hole-forming instrument 40 that matches the settings from three-dimensional images 22b of hole-forming instruments that mimic the hole-forming instrument 40 stored in the storage device 22. A fifth three-dimensional image (third surface data) 55 of the hole-forming instrument 40 selected by the control device 12 is provided, for example, by the manufacturer of the hole-forming instrument 40. The dentist can also create the fifth three-dimensional image 55 himself if the manufacturer of the hole-forming instrument 40 does not provide it. The control device 12 stores the fifth three-dimensional image 55 created by the dentist in the storage device 22.

[0088] Furthermore, the diameter of the hole 130 formed by the actual hole-forming instrument 40 is typically slightly smaller than the outer diameter of the actual implant 30. This relationship is also reflected on the screen of the display unit 18. The difference between the outer diameter of the hole-forming instrument and the outer diameter of the implant can be appropriately set as a parameter input by the dentist into the operation unit 20.

[0089] Based on the dentist's instructions, the control device 12 aligns the coordinate axes of the first to fifth three-dimensional images 51-55 on the screen of the software-based display unit 18. Within a predetermined coordinate system that aligns the coordinate axes, the second three-dimensional image (e.g., STL data) 52 is superimposed on the first three-dimensional image (e.g., DICOM data) 51, the third three-dimensional image 53, and the fourth three-dimensional image 54 and / or the fifth three-dimensional image 55 (step S5). At this time, the dentist finds points of agreement in size and shape, such as tooth alignment, and matches the first three-dimensional image 51 with the second three-dimensional image 52. Such matching can also be performed automatically by the control device 12 using software. The first three-dimensional image 51 includes the third three-dimensional image 53, the fourth three-dimensional image 54, and / or the fifth three-dimensional image 55. Therefore, as... Figure 10 As shown, in the display unit 18, the control device 12 can use software to clearly show the dentist the positional relationship between the surfaces of the teeth and gums of the lower jaw (second three-dimensional image 52) and the arteries and nerves inside the alveolar bone (third three-dimensional image 53). Therefore, the control device 12 can use software to clearly show the dentist the positional relationship between the surfaces of the teeth and gums of the lower jaw, the alveolar bone, non-target areas, implants, and hole-forming instruments.

[0090] Control device 12 is based on the dentist's instructions, such as Figure 11 As shown, on the screen of the software-based display unit 18, a three-dimensional image of the assistive device (implant template) is created according to the shape of the patient's jaw (step S6). That is, the control device 12 generates image data of the assistive device as a sixth three-dimensional image 56.

[0091] Figure 5 The illustrated assistive device 200 guides the hole forming device 40 at the treatment site and covers a portion of the gingival surface. When determining the treatment plan based on the dentist's instructions, the control device 12 outputs a three-dimensional image (e.g., STL data) of the assistive device 200 for use with a 3D printer 24 or grinder 26, and uses the 3D printer 24 or grinder 26 to model the assistive device 200. The assistive device 200 can be fitted or snapped into the model 100 created by the 3D printer 24 (see reference). Figure 4A and Figure 4B Furthermore, the resin material used for the assistive device 200 varies depending on whether the assistive device 200 is actually used during treatment. If a resin material approved for medical use is used as the assistive device 200, it can be used directly. If a resin material not approved for medical use is used as the assistive device 200, it cannot be used directly for actual treatment. In this case, as described later, the treatment plan prepared before surgery is verified by ensuring that the front end of the hole-forming device 40 is positioned in a predetermined position and does not contact the target model part 120 while the assistive device 200 is fitted with the model 100.

[0092] In actual surgery, dentists cannot determine exactly how many millimeters were removed from the gingival surface (not the alveolar bone) when creating a notch at the patient's treatment site. However, dentists can use the tools actually used to determine beforehand how many millimeters were removed from the alveolar bone surface and the distance from the alveolar bone surface to the artery.

[0093] Figure 12 and Figure 13 This diagram shows the jaw 310, which includes alveolar bone 312, teeth 314, gingiva 316, foramen 318, and non-target 320 containing the inferior alveolar artery and inferior alveolar nerve.

[0094] like Figure 12As shown, in actual implantation treatment, the dentist, for example, uses an assistive device 200 and a hole-forming device 40 to form a recess 318 in the lower alveolar bone 312 and the gingiva 316. The depth of the recess 318 is the sum of the distance D1 from the top of the lower alveolar bone 312 to the bottom of the recess 318 and the distance D2 from the top (prescribed surface) 335 of the lower alveolar bone 312 to the prescribed surface 220 of the assistive device 200. That is, when using the assistive device 200, the depth of the recess 318 is offset from the top of the lower alveolar bone 312 to the prescribed surface 220 of the assistive device 200.

[0095] In this case, such as Figure 12 and Figure 13 As shown, the dentist selects the hole-forming instrument 40 and the implant 30 respectively, such that (length H1 of the drill body 42 below the upper end 46b of the drill sleeve 46) - (height H2 of the fixing block 48) = (length D1 of the implant 30 during surgical use) + (offset value D2 when using the fixing auxiliary instrument 200). The dentist forms the recess 318 in such a way that the bottom of the recess 318 or the bottom of the implant 30 is separated from the non-target 320, and then embeds the implant 30 in the recess 318. That is, the dentist uses the shape (e.g., outer diameter), position, and angle of the implant 30 or the inner diameter, position, and angle of the recess 70 as parameters, and appropriately inputs the above parameters H1, H2, D1, D2 using the operating unit 20, while confirming the status relative to the patient's treatment target site, and makes the best treatment plan. The setting or installation of parameters H1 and H2 includes the dentist selecting the most suitable hole-forming instrument 40.

[0096] Control device 12 is based on the dentist's instructions, such as Figure 14 As shown, the first three-dimensional image 51 of the mandible, the second three-dimensional image 52 of the surface of the teeth and gums, the third three-dimensional image 53 of the non-target area, the fourth three-dimensional image 54 of the implant, and / or the fifth three-dimensional image 55 of the hole-forming device, and the sixth three-dimensional image 56 of the assistive device are superimposed on a specified coordinate system (step S7, fifth process). Figure 15 As shown, for example, a dentist checks the configuration status of the sixth three-dimensional image 56, the fourth three-dimensional image 54 or the fifth three-dimensional image 55, and the third three-dimensional image 53 on the display unit 18. That is, the control device 12 displays the auxiliary instruments, implants, hole-forming instruments for forming holes for implanting the implants, and non-target positional relationships to the dentist on the screen of the software-based display unit 18.

[0097] In addition, the control device 12 processes steps S3 to S7 using an image processing program and displays the results on the display unit 18 using an image display program.

[0098] Then, the control device 12 uses the 3D printer 24 or the grinder 26 to shape the auxiliary tool 200 (step S8).

[0099] The dentist checks if there are any correction points in the treatment plan displayed on the screen of the display unit 18 within the software of the control device 12. If there are any problems, corrections are made. If there are no problems, the control device 12, based on the dentist's instructions, will... Figure 16 The second three-dimensional image 52, the third three-dimensional image 53, the fourth three-dimensional image 54, and the fifth three-dimensional image 55 shown coincide in a prescribed coordinate system (step S9). Here, in the second three-dimensional image 52, if, for example, the image portion of the gingival surface opposite to the tooth or the prescribed surface 135 is deleted with the appropriate plane 52a as the boundary, the gingival surface including the tooth and the tooth-side gingiva is retained while the lingual and buccal walls are removed. Furthermore, according to the second three-dimensional image 52 obtained by the second scanner 16, it is not necessary to delete a portion of the image with the plane 52a as the boundary.

[0100] At this time, based on the dentist's instructions, the control device 12, using treatment planning software, aligns the second three-dimensional image 52, the third three-dimensional image 53, the fourth three-dimensional image 54, and the fifth three-dimensional image 55 on the display unit 18 screen in a prescribed coordinate system. Alternatively, if the data is interchangeable, the control device 12 can also, based on the dentist's instructions, import these three-dimensional images into a different software, such as 3DCAD software, and align them. In this case, for the fifth three-dimensional image 55 of the hole-forming instrument, the control device 12 removes the body and rod intended for surgery, and for example only imports the image of the sleeve (catheter) (the fifth three-dimensional image 55a related to the sleeve).

[0101] Control device 12 is based on the dentist's instructions, such as Figure 17 As shown, in the software, the fourth three-dimensional image 54 related to the implant and the fifth three-dimensional image 55a related to the sleeve are removed (step S10, third processing). That is, the control device 12 creates a three-dimensional image (fifth surface data) 100a of the model 100 on the screen of the software-based display unit 18. The three-dimensional image 100a of the model 100 includes: a three-dimensional image 110a of the model body 110 having a through hole 130a that imitates a tooth and an implantation recess, and a three-dimensional image 120a of the target model unit 120 used by the 3D printer 24.

[0102] The three-dimensional image of the support (base 140 and support column (sub-support column) 150) is preferably automatically produced using the function of 3D printer 24.

[0103] The control device 12 processes steps S9 to S10 using an image processing program and displays the results on the display unit 18 using an image display program.

[0104] The dentist confirms the three-dimensional image 100a of the model 100, which serves as data for the 3D printer 24. Then, the control device 12 outputs the three-dimensional image (fifth surface data) 100a of the model 100 to, for example, the 3D printer 24. That is, based on the operation input instructions to the operation unit 20, the dentist uses the 3D printer 24 controlled by the control device 12 to print a model 100 (refer to...) of the patient's treatment area. Figure 4A and Figure 4B The model 100 is shaped (step S11, fourth process) and includes: teeth, gingiva with a through hole 130 having an implantation recess 70 that imitates an implant 30, and a target model part 120 that imitates the inferior alveolar artery.

[0105] Here, the dentist temporarily suspends the process of creating a treatment plan using System 10.

[0106] Thus, in the operation unit 20 of the aforementioned system 10, the control device 12 is installed in the patient's three-dimensional image to determine the treatment target site and non-target areas. Various parameters of the implant to be placed at the treatment target site are set in the patient's three-dimensional image, or data obtained by the dentist using a 3D scanner, etc., to set a hole that mimics the recess for implanting the implant. Furthermore, the operation unit 20 inputs to the control device 12 a processing instruction (coordinate transformation instruction) to make the first surface data (data related to the surface image), the second or third surface data, and the fourth surface data coincide in a predetermined coordinate system, and a processing instruction to subtract the second and third surface data from the first surface data to generate fifth surface data representing the positional relationship between the treatment target site containing the hole and the fourth surface data.

[0107] That is, in the operation unit 20, the control device 12 is input with a processing instruction (coordinate transformation instruction) that makes at least one of the first surface data, second surface data, and third surface data coincide with the fourth surface data in a predetermined coordinate system, and a processing instruction that subtracts the second and third surface data from the first surface data to generate fifth surface data representing the positional relationship between the treatment object site containing the hole and the fourth surface data, and the control device 12 processes these instructions. Furthermore, if the second surface data is not used in the coordinate transformation instruction, it is not necessary to subtract the second surface data when creating the fifth surface data. Similarly, if the third surface data is not used in the coordinate transformation instruction, it is not necessary to subtract the third surface data when creating the fifth surface data.

[0108] like Figure 18AAs shown, the dentist inserts, for example, the shape of the gingiva suitable for the patient's treatment object and the auxiliary instrument 200 of the hole-forming instrument 40 into the model 100 created by the 3D printer 24. The dentist further inserts the body 42 of the hole-forming instrument 40 into the guide hole 210 of the auxiliary instrument 200. At this time, the hole-forming instrument 40 is used in the same way as in the actual surgery, using the sleeve 46 and the stop 48. The dentist visually confirms the positional relationship between the front end of the body 42 of the hole-forming instrument 40 and the target model portion 120. Specifically, when fitting the hole-forming instrument 40 into the guide hole 210 of the auxiliary instrument 200, and inserting the hole-forming instrument 40 into the through hole 130 to create a recess in the body 42 of the hole-forming instrument 40 for implanting the implant 30, the dentist confirms whether the body 42 of the hole-forming instrument 40 is facing the desired direction, or whether the front end of the body 42 remains in a state away from the target model portion 120 such as arteries and nerves.

[0109] In addition, in order to confirm the visual confirmation status of the front end of the body 42 of the hole forming instrument 40, dentists and others may remove the abutment 140 and the support 150 from the model 100 as needed.

[0110] The dentist confirms the range of motion of the tip of the body 42 of the hole-forming instrument 40. When forming a hole using the hole-forming instrument 40, the tip of the body 42 of the hole-forming instrument 40 is moved in a manner that does not damage the lingual wall in the alveolar bone. Therefore, the dentist confirms that the tip of the body 42 of the hole-forming instrument 40 does not contact the membranous body 145b, which serves as the lingual wall of the model 100.

[0111] In actual treatment, it is recommended that the tip of the main body 42 of the hole-forming appliance 40 be at least 3 mm away from the inferior alveolar nerve and inferior alveolar artery. Therefore, the target model portion 120 for each of the inferior alveolar nerve and inferior alveolar artery can be made at least 3 mm larger than the actual target, for example, towards the designated surface 135, and the treatment plan can be made so that it abuts against the tip of the hole-forming appliance 40. That is, by making a portion of the target model portion 120 closer to the designated surface 135 than the actual non-target position, the dentist can determine whether the hole-forming appliance 40 can be used for the patient based on the position of the abutment of the tip of the main body 42 of the hole-forming appliance 40 against the target model portion 120 and the positional relationship between the end face 48a of the stop 48 of the hole-forming appliance 40 on the main body 42 side. That is, for example, the dentist can also form the target model portion 120 as a target (contact) rather than a non-target (non-contact).

[0112] In this way, by using system 10, the dentist uses three-dimensional images 51 and 52 of the patient, as well as three-dimensional images 54 and 55 of the implant and hole-forming instrument, to create a model 100 of the same size and shape as the actual patient. This allows the dentist to perform a pre-verification of the procedure for creating the recess for implanting the implant 30 using the actual hole-forming instrument 40. If there are no problems during the pre-verification, the dentist performs the surgery on the actual patient according to the treatment plan. If problems arise during the pre-verification, the dentist modifies the treatment plan as needed, recreates the model 100 and the auxiliary instrument 200, and performs the pre-verification of the surgery again. The dentist repeats this process as needed until there are no problems during the pre-verification.

[0113] In addition, when modeling model 100, dentists may selectively use three-dimensional images 54 and 55 of the implant and the hole-forming instrument.

[0114] However, the position, size, and angle of the through hole 130 in the model body 110 determine the final size of the implant 30. In actual surgery, the dentist gradually increases the diameter and depth of the hole from a small one. Therefore, in actual surgery, when forming a concave hole, the dentist changes the drill body 42 from a short and small-diameter drill body to a gradually thickening and longer-diameter drill body. In system 10, the treatment plan can record what kind of hole-forming instrument the dentist uses to form the concave hole, but as a three-dimensional image modeled by 3D printer 24, the final size of the concave hole capable of embedding the implant 30 can be set.

[0115] By using multiple models 100 that are suitable for the size and shape of each drill body 42, dentists can perform pre-verification of the procedure by using models 100 shaped to match the size of the through hole 130 with the drill diameter, simultaneously changing from models with small and short drill diameters to models with gradually increasing sizes and lengths. That is, by using models 100, pre-verification can be performed not only in the final hole-forming instrument 40 but also in various surgical instruments used during the creation of the concave hole. Examples of surgical instruments used during the creation of the concave hole include injection devices for injecting bone filling materials, fibrin gel containing platelets separated from blood samples, or mixtures thereof into the treatment site.

[0116] Furthermore, currently, dentists sometimes calculate various parameters such as the length of the main body 42 of the hole-forming instrument, the height of the stop 48, and the offset value during surgery, depending on the implant 30 used. If the dentist misjudges any parameter, it is possible to use an instrument different from what should have been used, potentially leading to medical accidents. By using the model 100 of this embodiment, the dentist can verify in advance the appropriateness of the use of each surgical instrument until the final size of the concave hole is formed during the actual surgery.

[0117] Furthermore, a dentist or other treatment plan maker in System 10 might make mistakes with various parameters such as the length of the body 42 of the hole-forming instrument 40, the height of the stop 48, and the offset value when creating the treatment plan. They might also miss these parameter errors and have to abandon the treatment plan altogether. Even in such cases, if the dentist uses the model 100 and the actual hole-forming instrument 40 to verify the treatment plan beforehand, they can notice any errors in the parameter settings. Moreover, the dentist can use the model 100 to study how to modify parameters such as the length of the body 42 of the hole-forming instrument 40, the height of the stop 48, and the offset value to perform the surgery effectively. At this time, it is also possible to appropriately try hole-forming instruments other than the manufacturer's hole-forming instrument 40 specified when creating the treatment plan. Therefore, by using the model 100, the dentist can appropriately select the hole-forming instrument 40 from, for example, their own available instruments.

[0118] Therefore, prior surgical verification by the dentist using the model 100 described in this embodiment is an essential part of the implant treatment process. By using the model 100 for prior surgical verification, the dentist can appropriately modify the hole-forming instrument 40 as needed to achieve optimal treatment. Furthermore, the dentist can also use the system 10 to revise the treatment plan. Therefore, by using the model 100 of this embodiment, the dentist can significantly improve the safety of implant treatment.

[0119] In implantation treatment, a dentist, for example, creates an assistive device 200 to create a recess of a predetermined size in the desired location of the patient's jaw, and then implants the implant 30 into this recess. Conventionally, regarding the relationship between the hole-forming device 40 and the assistive device 200 used for implanting the implant 30, there was no means for the dentist to visually and practically confirm before surgery whether the tip of the body 42 of the hole-forming device 40 reaches the target location by substituting a hole-forming device from another manufacturer based on independent considerations. According to this embodiment, the dentist can use the model 100 and the actual hole-forming device 40 or implant 30 to verify the relationship between the model body 110, the target model portion 120, the assistive device 200, the hole-forming device 40, or the implant 30, including the patient's treatment site, before surgery. That is, the dentist can verify the prepared treatment plan in advance before the actual surgery. Therefore, the dentist can perform the actual operation based on prior verification of the safety of operating the hole-forming device 40. During actual surgery, the dentist can pre-determine the arrival position of the tip of the body 42 of the hole-forming instrument 40 relative to the non-target in the model 100, that is, the distance or contact state between the non-target and the tip of the body 42 of the hole-forming instrument 40. This allows for a further reduction in the time spent on the procedure. Therefore, by performing the surgery according to the treatment plan, the dentist can conduct the surgery with less invasiveness towards the patient.

[0120] The dentist can use system 10 to create a treatment plan between the medical procedure of acquiring patient data using the first scanner (CT scanner) 14 and the second scanner (intraoral scanner) 16 and the actual surgical procedure performed on the patient. In this embodiment, an example of the dentist creating the treatment plan themselves is described. The treatment plan creation process is not the actual treatment or diagnosis of the patient, but rather a crucial process related to the surgical procedure of implanting the implant 30 into the jaw. Therefore, the dentist's use of system 10 to create a treatment plan, and the prior verification of the surgery using the model 100 based on the treatment plan and the assistive device 200, is extremely effective in ensuring the safety of the implantation treatment. For this reason, the dentist's use of system 10, which can create optimal treatment plans for each patient, is extremely useful in ensuring the safety of the treatment.

[0121] As described above, since the creation of a treatment plan is not a direct medical procedure, it can be performed by unqualified individuals, such as technicians from the manufacturer or dental technicians. In this case, the dentist can also receive the treatment plan data, study the plan in System 10, and instruct or modify it themselves. In summary, the dentist can verify the safety of the treatment before performing the actual surgery using the model 100, the hole-forming instrument 40, the implant 30, and the auxiliary instrument 200.

[0122] When revising the treatment plan and remaking the model 100, the dentist performs a series of tasks using the system 10, thereby reducing the time spent exchanging information with professionals such as manufacturers. Therefore, when the dentist creates the treatment plan and outputs the model 100 via the 3D printer 24, a significant time reduction, such as one week, can be achieved compared to the method used by professionals. Consequently, the dentist can adjust the timing of surgery for patients to allow for earlier intervention.

[0123] When a dentist uses System 10, the dentist can proactively develop the best treatment plan, even if errors occur. Therefore, even when the output of the assistive devices 200 and model 100 is delegated to the practitioner, the number of corrections to the assistive devices 200 and model 100 can be reduced. Consequently, the dentist can adjust the timing of surgery for the patient to allow for earlier intervention.

[0124] Furthermore, previously, assistive devices (implant guides) were not always necessary. Therefore, it is difficult to argue that the use of assistive devices must be expanded in current implantation treatments. However, by using the system 10 of this embodiment, for example, the dentist designs the assistive device 200 and outputs it using, for example, a 3D printer 24 or a grinder 26 owned by the dentist, the cost of manufacturing the assistive device 200 can be significantly reduced. Therefore, by using the system 10 of this embodiment, the use of assistive devices such as implant guides can be expanded to include dentists during implantation treatments.

[0125] Therefore, by using system 10, the creation of treatment plans can be modified in a way that is largely controlled by the dentist, the production cost of treatment plans that include assistive devices 200 can be reduced, and safer treatments using assistive devices 200 can be expanded.

[0126] As described above, according to this embodiment, a preoperative verification system 10 for dental treatment planning, a preoperative verification procedure for dental treatment planning, a method for manufacturing a model 100 for preoperative verification of dental treatment planning, and a model 100 for preoperative verification of dental treatment planning are provided. When performing implantation treatment, such as implant placement, before using actual surgical instruments such as hole-forming instruments 40 for dental treatment, the dentist can verify in advance the positional relationship between the tip position of the surgical instrument and target positions such as the position of the inferior alveolar artery and inferior alveolar nerve in the patient's mandible.

[0127] In addition, without the use of assistive devices, such as Figure 18B As shown, a hole-forming device 40 is inserted into the hole 130 of the model 100 formed by the 3D printer 24. Furthermore, the end face 48a of the main body 42 of the model 100, which forms a stop 48, abuts against a predetermined surface 135 of the model body 110. The dentist confirms the range of motion of the front end of the hole-forming device 40's main body 42 and visually confirms the positional relationship between the front end of the hole-forming device 40's main body 42 and the target model portion 120. Specifically, when the dentist inserts the main body 42 of the hole-forming device 40 into the through hole 130 to create a recess for implanting the implant 30, they confirm whether the main body 42 of the hole-forming device 40 is facing the desired direction or whether the front end of the main body 42 remains in a state away from the target model portion 120, such as arteries and nerves.

[0128] exist Figure 4A and Figure 4B In the model 100 shown, there is no region corresponding to the patient's inferior alveolar bone. For example... Figure 4C As shown, the resin material of the model 100 produced by the 3D printer 24 is, for example, transparent or translucent, allowing the dentist to visually confirm the membranes 145a and 145b of the target model portion 120, which may also correspond to the lower alveolar bone. Membrane 145a mimics the wall of the alveolar bone on the cheek or lip side. Membrane 145a mimics the wall of the alveolar bone on the lingual side. In this case, it is preferable that the front end of the body 42 of the hole-forming appliance 40 does not contact the lingual membrane 145b. The lingual membrane 145b is preferably formed on the side of the target model portion 120 at a position corresponding to the lingual surface of the patient's actual alveolar bone. If the model 100 is not a model of the patient's lower jaw but a model of the upper jaw, then the lingual surface corresponds to the palatal surface of the patient's actual alveolar bone. When the resin material of the model 100 is, for example, transparent or translucent, the model 100 is formed from... Figure 10The lower left image shows the state of the fourth three-dimensional image 54 of the implant and the fifth three-dimensional image 55 of the hole-forming device, excluding the implant itself. For the area corresponding to the lower alveolar bone, as long as the positional relationship between the hole-forming device 40 and the target model part 120 can be visually confirmed, a mesh-like structure can also be formed.

[0129] The auxiliary device 200 has a guide hole 210 for forming a recessed hole for implanting the implant 30. When formed using a rotary drill bit as a hole forming device 40, the guide hole 210 and the recessed hole 70 are circular holes. Depending on the hole forming device 40, the guide hole 210 and the recessed hole 70 may sometimes be formed as non-circular holes not based on a rotary drill bit.

[0130] In this embodiment, an example using two scanners, a first scanner 14 and a second scanner 16, is described. For example, if one scanner can acquire the first three-dimensional image 51 and the second three-dimensional image 52, then multiple scanners are not required.

[0131] The first scanner 14 and the second scanner 16 are owned, for example, by a dentist who acquires a three-dimensional image of the patient's jaw. The 3D printer 24 can also be used to model the object, and this can be done by a suitable practitioner. For example, since the first scanner 14 and / or the second scanner 16 can be used to acquire a three-dimensional image of the patient beforehand, it is preferable that the first scanner 14 and / or the second scanner 16 are not included in the system 10. Preferably, the 3D printer 24 and / or the grinder 26 are also not included in the system 10.

[0132] In this embodiment, an example of fabricating an assistive device 200 in system 10 and using the assistive device 200 in an actual surgical procedure is described. The assistive device 200 may not always be necessary, for example, depending on the selection of the hole-forming device 40. Figure 18B As shown, the treatment plan can also be formulated by configuring a hole-forming device 40, including a drill body 42 and a sleeve 46, through the hole 130 instead of configuring the assistive device 200 on the model 100.

[0133] (First variation)

[0134] In system 10 of the first embodiment, such as Figure 19 The left image in the figure illustrates an example of matching a CT image (first 3D image) of the patient's jaw with a 3D image (second 3D image 52) of the patient's jaw.

[0135] For example, sometimes metal materials are used on a portion of a patient's teeth. The patient's CT images (first three-dimensional image 51) are sometimes difficult to obtain a clear image due to noise, such as that from artifacts. In this case, it is preferable that the control device 12, while identifying points of conformity in the shape of the teeth, such as the alignment of the teeth, offsets the first three-dimensional image 51 and the second three-dimensional image 52 relative to each other based on instructions from the dentist.

[0136] For example, with Figure 19 The left image in the diagram is the starting point, such as... Figure 19 As shown in the right figure, based on the dentist's instructions, the control device 12, in the display unit 18, software-wise, overlays the image of the second three-dimensional image 52 onto the first three-dimensional image 51, offsetting it from the image of the third to fifth three-dimensional images 53-55 that overlap on the first three-dimensional image 51. Specifically, the surface of the gingiva in the second three-dimensional image 52, for example, matches the surface of the alveolar bone in the first three-dimensional image 51, or is disposed within the alveolar bone. At this time, the image obtained by subtracting the first three-dimensional image 51 from the image obtained by overlaying the second to fifth three-dimensional images 52-55 (see...) Figure 17 In the upper left image (of the image), the distance between the gingival surface in the second 3D image 52 and the non-target area in the third 3D image 53 is shorter than the distance from the patient's actual gingival surface to the non-target area. Therefore, in actual surgery, the dentist uses a hole-forming instrument 40 that is shorter than actually usable, and relative to the third 3D image 53, configures the fourth 3D image 54 corresponding to the implant to a shallower position than actually possible. Thus, the dentist can plan the treatment to a safer side.

[0137] If the matching between the first three-dimensional image 51 and the second three-dimensional image 52 is unreliable, then the second three-dimensional image 52 is close to the third three-dimensional image 53 within the actual range. Therefore, by setting the distance between the second three-dimensional image 52 and the third three-dimensional image 53 to be equal to or shorter than the actual distance when planning the implant position, safety can be ensured. In actual processing, the control device 12, based on the dentist's instructions, sets the feature points of the second three-dimensional image 52 (the three-dimensional image of the surface) to a state offset towards the image side (target side) of the third three-dimensional image 53 (the fourth surface data) as the new second three-dimensional image 52 (the first surface data).

[0138] However, with Figure 19 The example shown in the right figure, conversely, separates the gingival surface of the second 3D image 52 relative to the first 3D image 51 and the third 3D image 53, enabling treatment planning to be directed towards the danger zone. The image obtained by subtracting the first 3D image 51 from the image obtained by overlapping the second to fifth 3D images 52-55 (see [link]). Figure 17 In the upper left image, the distance between the gingival surface in the second 3D image 52 and the non-target area in the third 3D image 53 is longer than the actual distance between the patient's gingival surface and the non-target area. Therefore, in actual surgery, the dentist may mistakenly believe that the implant 30 and the hole-forming appliance 40 can be positioned, for example, deeper or set longer. Consequently, the dentist may plan the treatment on a more dangerous side.

[0139] (Second variation)

[0140] use Figure 20 The system 10 of the second variation of the first embodiment will be described here. Here, the use of... Figure 3 The different parameter settings for different hole forming apparatuses 40 are explained.

[0141] Figure 20 Indicates and Figure 3 First variation of different hole forming apparatus 40. Figure 20 The hole-forming device 40 shown includes a main body 42, a rod 44, a sleeve 46, and a stop 48, as well as a handle 50. The lower end of the stop 48 abuts against the handle 50. Therefore, the position of the front end of the main body 42 of the hole-forming device 40 is adjusted by the height of the handle 50. For example, when the height of the handle 50 increases, the bottom of the recessed hole 318 separates from the non-reachable target 320.

[0142] like Figure 20 As shown, the dentist selects the hole-forming instrument 40 and the implant 30 respectively, such that (length D1 of implant 30) + (offset value D2 when using auxiliary instrument 200) = (length H1 of drill body 42 which is lower than the upper end of drill sleeve 46) - (height H2 of stop 48) - (height H3 of handle 50). Furthermore, the control device 12 sets various settings corresponding to the various hole-forming instruments 40 based on the dentist's instructions.

[0143] That is, the dentist uses the shape (length, outer diameter), position, and angle of the implant 30 as parameters, and appropriately inputs the above parameters H1, H2, H3, D1, and D2 using the operating unit 20, while confirming the status relative to the patient's treatment site, to create the optimal treatment plan. The setting or installation of parameters H1, H2, and H3 includes the dentist selecting the most suitable hole-forming instrument 40.

[0144] (Third variation)

[0145] In the first embodiment, such as Figure 12As shown, the example described is the case where the implant 30 is embedded in a recess 318 formed in the mandible. For example, instead of embedding the implant 30 in the recess 318, a method is formed... Figure 21 Even when the implant shown has a recess for its own tooth 400, the system 10 described in the first embodiment can also be used to create a treatment plan.

[0146] The dentist can create a three-dimensional image (second surface data) of their own tooth 400 in the same way as creating a three-dimensional image of the implant 30. The three-dimensional image of the own tooth 400 can be acquired using various devices. For example, the three-dimensional image of the own tooth 400 can also be acquired using a second scanner 16.

[0147] Based on the dentist's instructions, the control device 12 uses the shape, position, and angle of the patient's own tooth 400 as parameters. The operation unit 20 appropriately inputs these parameters H1, H2, H3, D1, and D2, and while confirming the condition relative to the patient's treatment site, it creates an optimal treatment plan. Setting or installing parameters H1, H2, and H3 involves the dentist selecting the most suitable hole-forming instrument 40. The patient's own tooth 400 differs from a manufactured implant 30 in shape; each patient's shape is different. Therefore, when the patient's own tooth 400 is implanted in the lower jaw, sometimes two or three recesses are created based on the shape of the tooth 400. When creating these recesses, auxiliary instruments 200 can also be used. For example, multiple identical or different hole-forming instruments 40a and 40b can be used sequentially when creating the recesses.

[0148] Furthermore, in regenerative medicine using stem cells from teeth as a substitute for one's own teeth, treatment can be performed by implanting stem cells from teeth cultured in vivo or in vitro into the cavity. In this case, the control device 12, based on the dentist's instructions, uses the shape, position, and angle of the cellular tissue (e.g., an aggregate of cellular tissue) that serves as the implant in regenerative medicine as parameters during the creation of the treatment plan in the system 10. The operation unit 20 appropriately inputs these parameters H1, H2, H3, D1, and D2, while confirming the condition relative to the patient's treatment site, to create the optimal treatment plan. Setting or installing parameters H1, H2, and H3 includes the dentist selecting the most suitable cavity-forming instrument 40. Thus, when using the system 10 for regenerative medicine, the dentist can also create a treatment plan and a pre-operative verification model of the dental treatment plan.

[0149] (Second Implementation)

[0150] In the second embodiment, using Figures 22 to 30 The description explains that system 10 is used to select from multiple implants 30 (see reference). Figure 2 This refers to an example of implantation treatment placed in the patient's upper palate. For matters identical to those described in the first embodiment, descriptions are appropriately omitted.

[0151] The first scanner (dental CT scanner) 14 acquires a first three-dimensional image (e.g., DICOM data) 551 of the patient's teeth, bones, and internal structures, such as the upper jaw, and outputs it to the control device 12. The control device 12 stores the first three-dimensional image 551 in the storage device 22. The second scanner (intraoral scanner) 16 acquires a second three-dimensional image (e.g., STL data) 552 of the patient's teeth and gum surfaces, such as the upper jaw, and outputs it to the control device 12. The control device 12 stores the second three-dimensional image 552 in the storage device 22.

[0152] like Figure 22 As shown, the dentist uses a first three-dimensional image 551 obtained by the first scanner 14, representing the upper alveolar bone, maxillary cavity, posterior superior alveolar artery, and greater palatine artery, on the software. When setting the recess 70 for implant placement, the dentist identifies the posterior superior alveolar artery, greater palatine artery, and maxillary cavity floor mucosa (see reference) as non-target areas. Figures 28 to 30 The location of the non-reachable target is then determined. The dentist then marks the feature points of the non-reachable target on the software, thus forming the non-reachable target in three dimensions (step S3). The dentist creates the non-reachable target as third 3D images 553a, 553b, and 553c. Additionally, the posterior superior alveolar artery, greater palatine artery, and maxillary cavity floor mucosa are adjacent to the superior alveolar bone.

[0153] exist Figure 22 The right-hand image shows a three-dimensional image 553a of the location of the maxillary cavity 551a, the location of the posterior superior alveolar artery, and a three-dimensional image 553b of the location of the greater palatine artery.

[0154] Additionally, the three-dimensional image 553c corresponding to the maxillary cavity floor mucosa can be fabricated like part of an eggshell, or it can be formed as a whole, for example, in a spherical shape (see reference). Figure 30 This is because, during the prior validation of the treatment plan using a model, the area that affects the reach of the front end of the body 42 of the aperture forming device 40 is the area corresponding to the maxillary cavity floor mucosa, and the remaining areas do not affect the reach of the front end of the body 42 of the aperture forming device 40.

[0155] Control device 12 is based on the dentist's instructions, such as Figure 22As shown, in the software, the length, outer diameter, angle, position, etc. of the implant 30, which mimics the implant 30, are set or installed at the treatment location (step S4). At this time, the control device 12 appropriately sets the outer diameter, position, angle, and various parameters (including the selection of the hole forming instrument 40) of the implant 30 as described in the first embodiment based on the dentist's instructions, so as to optimize the treatment plan.

[0156] Control device 12 is based on the dentist's instructions, such as Figure 23 As shown, in the software, the coordinate axes of the first to fifth three-dimensional images 551, 552, 553a-553c, 54, and 55 are aligned, and the second three-dimensional image 552 is superimposed on the first three-dimensional image 551, the third three-dimensional images 553a-553c, and the fourth three-dimensional image 54 and / or the fifth three-dimensional image 55 in a specified coordinate system (step S5). Therefore, the control device 12 clearly indicates to the dentist in the software the positional relationship between the surfaces of the upper teeth and gums and the arteries inside the upper alveolar bone.

[0157] Control device 12 is based on the dentist's instructions, such as Figure 24 As shown, the assistive device (implant template) is fabricated in the software to match the shape of the patient's palate (step S6). That is, the control device 12 creates the assistive device as the sixth three-dimensional image 556. The dentist confirms the configuration status of the sixth three-dimensional image 556, the fourth three-dimensional image 54 or the fifth three-dimensional image 55, and the third three-dimensional images 553a and 553b on the display unit 18 (step S7). Then, the control device 12 outputs the assistive device based on the dentist's instructions (step S8).

[0158] The dentist checks the treatment plan on the software for any corrections. If there are any issues, they are corrected. If there are no issues, the control device 12, based on the dentist's instructions, will... Figure 25 The first three-dimensional image 551 showing the teeth and upper alveolar bone, the second three-dimensional image 552 showing the teeth and gingiva, the third three-dimensional images 553a and 553b not reaching the target, the fourth three-dimensional image 54 of the implant, and the fifth three-dimensional image 55 of the hole-forming device 40 are superimposed on a predetermined coordinate system (step S9). At this time, the control device 12 uses the same software as the software for creating the treatment plan to make the second three-dimensional image 552, the third three-dimensional image 553a and 553b, the fourth three-dimensional image 54, and the fifth three-dimensional image 55 superimposed on a predetermined coordinate system.

[0159] Based on the dentist's instructions, the control device 12 removes the fourth three-dimensional image 54 associated with the implant 30 and the fifth three-dimensional image 55a associated with the sleeve in the software (step S10). That is, as... Figure 26 and Figure 27As shown, the control device 12 creates the teeth, the gingiva with the through hole that mimics the implantation recess of the implant 30, and the data (surface data of the model) used by the non-target 3D printer 24 in the software.

[0160] After the dentist confirms the data used by the 3D printer 24, based on the dentist's instructions, the 3D printer 24, controlled by the control device 12, models the patient's treatment site, which mimics a tooth, has a through hole with an implantation recess that mimics the implant 30, the posterior superior alveolar artery as the non-target, and the greater palatine artery (step S11).

[0161] Here, Figure 28 This indicates the relationship between the alveolar bone 712, teeth 714, and maxillary cavity 730 of the maxilla 710. Figure 29 This indicates the fixation status of the implant 30 on the maxilla 710 after maxillary cavity floor lifting surgery, such as jaw cavity lift (alveolar bone lift). When the implant 30 is placed in the maxillary alveolar bone 712 of the maxilla 710, there may be... Figure 28 The upper alveolar bone 712 shown is insufficient in thickness. In this case, artificial bone filling material 740 is used to push it upwards. Figure 29 The maxillary cavity floor lifting surgery is shown for the maxillary cavity floor mucosa 730a of the maxillary cavity 730. In the case of performing the maxillary cavity floor lifting surgery, the maxillary cavity floor mucosa 730a of the maxillary cavity 730, together with the posterior superior alveolar artery and the greater palatine artery, also becomes a non-reachable target of the drill body 42, which is the hole forming instrument 40.

[0162] During the maxillary cavity floor lifting surgery, a recess 718 is made in the maxillary alveolar bone 712 for implanting the implant 30. At this time, for example, the recess 718 is made near the bottom of the maxillary cavity 730, but the maxillary cavity floor mucosa 730a is not penetrated. The maxillary alveolar bone 712 is not penetrated by a hole-forming instrument 40, but by a bone chisel or the like. Bone filling material 740 is filled between the maxillary cavity 730 mucosa 730a and the maxillary alveolar bone 712. In this state, the implant 30 is implanted. At this time, the bone filling material 740 and the implant 30 do not damage the maxillary cavity floor mucosa 730a.

[0163] In this case, the model used for preoperative verification of the dental treatment plan is, for example, the same as the case where no inferior alveolar bone is formed, as described in the first embodiment, such as... Figure 30As shown, instead of forming the upper alveolar bone, a model is created that mimics the teeth, gingiva, posterior superior alveolar artery, greater palatine artery, and maxillary cavity floor mucosa. If this model is formed, the dentist can confirm the positional relationship between the front end of the body 42 of the selected cavity-forming instrument 40 and the maxillary cavity floor mucosa 730a when the instrument is fitted into the guide hole of the auxiliary instrument and the through hole of the model. That is, the dentist can verify in advance whether dental treatment, i.e., dental treatment planning, can be performed more safely.

[0164] In addition, when the model of the maxilla uses the area corresponding to the teeth and gums as the main body of the model, it is preferable to use the model 100 described in the first embodiment, for example, the maxillary cavity floor mucosa 730a is supported by a support column.

[0165] Similar to the case of using system 10 on the lower jaw, the same effect can be obtained when using system 10 on the upper jaw.

[0166] As explained above, according to this embodiment, a preoperative verification system 10 for dental treatment plans, a preoperative verification procedure for dental treatment plans, a method for manufacturing a model for preoperative verification of dental treatment plans, and a model for preoperative verification of dental treatment plans can be provided. This allows dentists to verify the positional relationship between the tip of the surgical instrument and target positions such as the posterior superior alveolar artery, the greater palatine artery, and the maxillary cavity mucosa of the patient before performing dental treatment using actual surgical instruments for implantation treatment, such as implantation treatment.

[0167] Alternatively, in the system 10 of the second embodiment, the implant 30 may be replaced by the autologous teeth 400 or cell tissue described in the modified example of the first embodiment.

[0168] (Modified example)

[0169] like Figure 31 The following example illustrates the use of the upper jaw. The following section describes cases where a dentist determines that implantation treatment is feasible. Figure 6 The operation in step S2 of the process shown is explained. Additionally, in... Figure 31 In the text, the symbols and expressions are omitted. Figure 17 An illustration of the image corresponding to the third three-dimensional image 53 of the target of the three-dimensional image 100a of the model 100 shown.

[0170] For example, sometimes a tooth is extracted (represented by symbol 550 in 3D image 551), and an implant 30 is placed at the extraction site. In this case, the extracted tooth 550 is present at the treatment site in the first 3D image 551 of the maxilla before treatment. Based on the dentist's instructions, the control device 12 can three-dimensionally cut the predetermined tooth 550 to be extracted in both the first and second 3D images 551 and 552. Therefore, based on the dentist's instructions, the control device 12 forms region 561 in the first 3D image 551 and region 562 in the second 3D image 552. The shapes of regions (spaces) 561 and 562 can be appropriately set by the dentist.

[0171] Then, the dentist performed... Figure 6 The process shown is step S3. Therefore, based on the dentist's instructions, the control device 12 generates three-dimensional images related to the non-reachable target (third three-dimensional images 553a, 553b, 553c) (see reference). Figure 22 In addition, during the above-mentioned maxillary cavity floor lifting surgery, the maxillary cavity floor mucosa 730a of the maxillary cavity 730, together with the posterior superior alveolar artery and the greater palatine artery, becomes a non-reachable target of the drill body 42, which serves as the hole forming instrument 40.

[0172] Here, the control device 12 performs operations based on the dentist's instructions. Figure 6 The process shown is in step S4. The control device 12 sets, for example, a fourth three-dimensional image 54 corresponding to the implant and a fifth three-dimensional image 55 corresponding to the hole forming instrument, so that the front end of the implant 30 is positioned at a location that does not reach the determined target.

[0173] Then, the control device 12 performs... Figure 6 The process shown includes steps S5-S11.

[0174] Furthermore, the processing after step S5 is based on the three-dimensional images 551 and 552 that form regions 561 and 562. Therefore, the sixth three-dimensional image 556 corresponding to the planting guide is formed as non-existent. Figure 31 The image 550 of the tooth is formed in a circular shape that matches the shape of the hole forming instrument 40. In addition, when the image 550 of the tooth is present, an irregular space is formed in which the shape of the image 550 of the tooth is removed relative to the image 556a of the drill hole.

[0175] According to the first and second embodiments including the above-described modifications, for example, before performing implantation treatment of the implant 30 or the patient's own tooth, the dentist can use a model 100 made using the dental treatment pre-verification system 10, a hole-forming instrument (surgical instrument) 40 intended for use in actual dental treatment, the implant 30, or the patient's own tooth 400 to verify before surgery whether there are any problems with the treatment plan that includes the selection of various treatment instruments. Therefore, it is possible to prevent the dentist from doubting whether the tools used in surgery (e.g., the hole-forming instrument 40) can be used to treat the patient's treatment site according to the treatment plan, the treatment time, and the burden on the patient. Therefore, by using the system 10 and model 100 including the first and second embodiments including the above-described modifications, and the hole-forming instrument 40 set in the treatment plan, dental treatment can be performed with less invasiveness on the patient.

[0176] Furthermore, by having a treatment plan created using the system 10, which is confirmed by a dentist who actually performs the treatment rather than a professional, until a three-dimensional image of the model 100 is produced, it is possible to perform treatments such as implantation of the implant 30 or the patient's own teeth more safely.

[0177] Furthermore, when dentists have access to a 3D printer 24 and a grinding machine 26, the time required for transferring 3D images and transporting the model 100 can be eliminated, thus shortening the time spent on a series of procedures from the creation of the treatment plan to the prior verification of dental treatment using the model 100. Additionally, when revising the treatment plan, the time required for a series of procedures from revising the treatment plan to the prior verification of dental treatment using the model 100 can also be shortened.

[0178] Furthermore, the present invention is not limited to the embodiments described above, and various modifications can be made during the implementation phase without departing from its spirit. Additionally, the embodiments can be implemented in appropriate combinations to achieve combined effects. Moreover, the invention, which includes various stages in the above embodiments, can yield various inventions through appropriate combinations of the disclosed constituent elements.

Claims

1. A model for preoperative validation of dental treatment plans, comprising: The model body is formed based on the patient's jaw and imitates at least a portion of the treatment target area of ​​the patient's jaw in the same size and shape. A hole specification section is provided on the model body, which specifies a hole corresponding to a recessed hole for embedding an implant in the treatment object area; The target model section, which mimics a target alveolar bone adjacent to or embedded in the treatment object site, does not contact the tip of a surgical instrument when passing through the orifice designation section, provided that the surgical instrument is positioned in the same positional relationship as the treatment object site and the target. Alternatively, it contacts the tip of the surgical instrument when passing through the orifice designation section closer to the positional relationship of the treatment object site and the target than the treatment object site and the target. A space is formed between the hole-defined portion and the target model portion. This space allows for visual confirmation of the range that the tip of the surgical instrument can reach from the hole-defined portion to the target model portion, and also allows for visual confirmation of the range that the tip of the surgical instrument can reach from the hole-defined portion in the direction of tooth arrangement and in the direction intersecting the direction of tooth arrangement.

2. The model as described in claim 1, wherein, The target model is supported on the model body by a main support column. The main pillar forms part of the frame that divides the space.

3. The model as described in claim 1 or 2, wherein, The model body has walls that mimic the lingual or palatal side of the alveolar bone surface.

4. The model as described in claim 1 or 2, wherein, have: The base, wherein the target model part is configured between the base and the model body; At least one of the following: a support pillar connecting the model body and the base, and the model body and the target model part; a support pillar connecting the model body and the base, and the base and the target model part; and a support pillar connecting the model body and the target model part, and the base and the target model part.

5. A preoperative verification instrument for dental treatment planning, wherein, have: The model is the model as described in claim 1 or 2; An auxiliary instrument that engages or locks with the model to guide the surgical instrument in order to form the orifice in the desired position using the surgical instrument.

6. A method for manufacturing a model for preoperative validation of a dental treatment plan, comprising: In a three-dimensional image of the patient’s jaw, the computer, based on the instructions of the dental treatment planner, determines the treatment target area of ​​the patient and the target for non-contact or contact with the tip of the surgical instrument used to treat the treatment target area. In the three-dimensional image, the computer, based on the instructions of the dental treatment planner, sets or installs at least one of the parameters related to the implant placed at the treatment site and the parameters related to the surgical instruments, and sets a hole that mimics the recess for embedding the implant. The computer, based on the instructions of the dental treatment planner and on at least one of the parameters associated with the implant and the parameters associated with the surgical instrument, as well as first surface data of the treatment site and its surrounding area, creates a three-dimensional image of an auxiliary instrument that is embedded around the treatment site and used to guide the surgical instrument in order to form the recess at the desired location using the surgical instrument. Based on the instructions of the dental treatment planner, the computer subtracts at least one of the second surface data of the surface of the implant and the third surface data of the surface of the surgical instrument from the first surface data to represent the positional relationship between the treatment object site containing the hole and the fourth surface data of the target, and creates a three-dimensional image of the fifth surface data of the model for preoperative verification of the dental treatment plan. Determining the target includes: determining the image of the main strut connected to the image based on the first surface data. Creating a three-dimensional image based on the fifth surface data includes: the computer outputting a three-dimensional image of the assistive device for use in the assistive device's output. Before the computer outputs a three-dimensional image of the fifth surface data for the output of the model, a three-dimensional image of the auxiliary device is created.

7. A method for manufacturing a preoperative validation model for a dental treatment plan, comprising: In a three-dimensional image of the patient’s jaw, the computer, based on the instructions of the dental treatment planner, determines the treatment target area of ​​the patient and the target for non-contact or contact with the tip of the surgical instrument used to treat the treatment target area. In the three-dimensional image, the computer, based on the instructions of the dental treatment planner, sets or installs at least one of the parameters related to the implant placed at the treatment site and the parameters related to the surgical instruments, and sets a hole that mimics the recess for embedding the implant. Based on the instructions of the dental treatment planner, the computer subtracts at least one of the second surface data of the surface of the implant and the third surface data of the surface of the surgical instrument from the first surface data of the treatment object and its surrounding area to represent the positional relationship between the treatment object containing the hole and the fourth surface data of the target, and creates a three-dimensional image of the fifth surface data of the model used for preoperative verification of the dental treatment plan. Determining the target includes: determining the image of the main strut connected to the image based on the first surface data. Based on the fifth surface data, the model has: The model body, which imitates at least a portion of the treatment object area with the same size and shape as at least a portion of the treatment object area; A hole defining section is provided on the model body for defining the hole; The target model section, which mimics the target, avoids contact with the tip of the surgical instrument when the surgical instrument, positioned in the same positional relationship as the treatment object and the target, passes through the orifice designation section; or, when the surgical instrument passes through the orifice designation section closer to the treatment object and the target than their positional relationship, it contacts the tip of the surgical instrument. A space is formed between the hole-defined portion and the target model portion. This space allows for visual confirmation of the range that the tip of the surgical instrument can reach from the hole-defined portion to the target model portion, and also allows for visual confirmation of the range that the tip of the surgical instrument can reach from the hole-defined portion in the direction of tooth arrangement and in the direction intersecting the direction of tooth arrangement.

8. The manufacturing method as described in claim 6 or 7, wherein, Include: The first surface data is set when the feature points of the three-dimensional image of the surface of the treatment target and its surrounding area are matched with the feature points of the three-dimensional image of the patient's jaw; or, the first surface data is set when the feature points of the three-dimensional image of the surface are offset relative to the feature points of the three-dimensional image of the patient's jaw towards the image side of the fourth surface data based on the target.

9. A preoperative verification system for dental treatment plans, comprising: Control device; The instruction input unit, controlled by the control device, inputs the following processing instructions to the control device: In a three-dimensional image of the patient's jaw, the treatment target area of ​​the patient is determined, and the target is determined whether the tip of the surgical instrument used to treat the treatment target area is in contact or not in contact. In the three-dimensional image, at least one of the parameters related to the implant embedded in the treatment site and the parameters related to the surgical instrument is set or installed, and a hole that mimics the recess for embedding the implant is set. as well as By subtracting at least one of the second surface data of the implant and the third surface data of the surgical instrument from the first surface data of the treatment object and its surrounding area, a third surface data is generated to represent the positional relationship between the treatment object containing the hole and the target, thus creating a three-dimensional image of the fifth surface data for a model used for preoperative verification of the dental treatment plan. The processing instructions for determining the target include: determining the image of the main pillar connected to the image based on the first surface data. The control device performs processing based on the processing instructions and is capable of outputting a three-dimensional image of the fifth surface data for use in the model output. The instruction input unit receives a processing instruction to generate a three-dimensional image of an auxiliary instrument based on at least one of parameters related to the implant and parameters related to the surgical instrument, as well as the first surface data. This auxiliary instrument is used to embed itself around the treatment site, and the surgical instrument is guided to form the recess at the desired location using the surgical instrument. The control device performs processing based on the processing instructions and is capable of outputting a three-dimensional image of the fifth surface data of the model and a three-dimensional image of the auxiliary device for outputting the auxiliary device. Before outputting the three-dimensional image of the fifth surface data, the device is processed to create a three-dimensional image of the auxiliary device based on the processing instructions.

10. The preoperative verification system as described in claim 9, wherein, When the surgical instrument in the three-dimensional image is inserted into the hole in the three-dimensional image of the patient, the parameters associated with the surgical instrument are set or installed as the third surface data so that the surgical instrument leaves or contacts the target.

11. The preoperative verification system as described in claim 9 or 10, wherein, In the fourth surface data of the target, the positional relationship between the target and the hole is closer than the positional relationship between the actual target and the concave hole on the patient's jaw.

12. The preoperative verification system as described in claim 11, wherein, The first surface data is set while the feature points of the three-dimensional image of the surface are offset relative to the feature points of the three-dimensional image of the patient's jaw towards the image side of the fourth surface data based on the target.

13. The preoperative verification system as described in claim 9 or 10, wherein, It has a 3D printer that outputs a model for preoperative verification of the dental treatment plan based on a three-dimensional image of the fifth surface data.

14. A preoperative verification procedure for a dental treatment plan, To make the computer perform: The first step involves identifying the treatment target area of ​​the patient's jaw in a three-dimensional image of the patient's jaw, and determining the target area to be treated by the tip of the surgical instrument used to treat the treatment target area, either in contact with or not in contact with the target area. The second process involves setting or installing at least one of the parameters related to the implant embedded in the treatment site and the parameters related to the surgical instrument in the three-dimensional image, and setting a hole that mimics the recess for embedding the implant. The third process involves subtracting at least one of the second surface data of the surface of the implant and the third surface data of the surface of the surgical instrument from the first surface data of the treatment object and its surrounding area to represent the positional relationship between the treatment object containing the hole and the fourth surface data of the target, thereby creating a three-dimensional image of the fifth surface data of a model for preoperative verification of the dental treatment plan. as well as The fourth processing step involves outputting a three-dimensional image of the fifth surface data of the model. Determining the target includes: determining the image of the main strut connected to the image based on the first surface data. Based on the fifth surface data, the model has: The model body, which imitates at least a portion of the treatment object area with the same size and shape as at least a portion of the treatment object area; A hole defining section is provided on the model body for defining the hole; The target model section, which mimics the target, avoids contact with the tip of the surgical instrument when the surgical instrument, positioned in the same positional relationship as the treatment object and the target, passes through the orifice designation section; or, when the surgical instrument passes through the orifice designation section closer to the treatment object and the target than their positional relationship, it contacts the tip of the surgical instrument. A space is formed between the hole-defined portion and the target model portion. This space allows for visual confirmation of the range that the tip of the surgical instrument can reach from the hole-defined portion to the target model portion, and also allows for visual confirmation of the range that the tip of the surgical instrument can reach from the hole-defined portion in the direction of tooth arrangement and in the direction intersecting the direction of tooth arrangement.

Images