Crown guide device having functions of both surgical guide and prosthesis, and device and method for generating model thereof

Abstract

A device for generating a model of a crown guide device comprises: a data processing unit that obtains a three-dimensional oral image including multiple tomographic images of a region including teeth of a patient through cone beam computed tomography; a crown processing unit that detects a tooth mask indicating pixels occupied by the teeth in the oral image, analyzes the tooth mask, and generates a crown portion having a shape simulating the crown of a missing tooth in the oral image; a fixture processing unit that analyzes the dental mask and generates a fixture corresponding to the missing tooth in the oral image; and a guide forming unit extending from at least one side surface of the crown unit to form a support unit formed to cover at least a portion of the surface of the tooth mask of an adjacent tooth neighboring the missing tooth.

Description

Crown guide device having the functions of both surgical guide and prosthesis, device for creating a model thereof and method therefor

[0001] The present invention relates to a crown guide device, and more particularly, to a crown guide device having the functions of both a surgical guide and a prosthesis, a device for creating a model thereof, and a method therefor.

[0002] Meanwhile, the present invention was supported by the national research and development project in Table 1 below.

[0003] Project number S1402-23-1001 Ministry name Ministry of Science and ICT Project management (specialized) organization name National IT Industry Promotion Agency Research project name AI-based medical device commercialization demonstration support project Research project name AI diagnostic assistance virtual surgery and digital surgical guide for dental implant restoration in a super-aged society: multi-center clinical demonstration Contribution rate 100% Project implementing organization name Dentium ICT Gwanggyo Factory Research period July 1, 2023 ~ December 31, 2025

[0004] In conventional implant surgery, a temporary tooth is used instead of a prosthesis, and then the prosthesis is applied. This increases the procedure time.

[0005] The purpose of the present invention is to provide a crown guide device having the functions of both a surgical guide and a prosthesis, a device for creating a model thereof, and a method therefor.

[0006] In order to achieve the above-described purpose, a crown guide device according to a preferred embodiment of the present invention includes a crown portion formed in a crown shape corresponding to a lost tooth, and a support portion formed to extend from at least one side of the crown portion and cover at least a portion of a surface of an adjacent tooth adjacent to the lost tooth.

[0007] The support portion includes an occlusal surface support portion made of a thin film that conforms to the shape of the adjacent tooth while covering the occlusal surface of the adjacent tooth, and a lateral support portion made of a thin film that conforms to the shape of the adjacent tooth while covering the upper portion from the maximum fusion part of the adjacent tooth among the mesial surface or the distal surface of the adjacent tooth.

[0008] The crown portion has a central axis aligned with the vertical central axis of the fixture, an inner space for joining with an abutment from below, a central axis aligned with the central axis of the inner space, and a guide hole formed from the upper surface of the crown portion to connect with the inner space.

[0009] In order to achieve the above-described object, a method for generating a model of a crown guide device according to a preferred embodiment of the present invention comprises the steps of: a data processing unit obtaining a three-dimensional oral cavity image including a plurality of cross-sectional images of an area including a patient's teeth through cone beam computed tomography; a crown processing unit detecting a tooth mask representing pixels occupied by teeth in the oral cavity image; a crown processing unit analyzing the tooth mask to generate a crown portion having a shape replicating a crown of a lost tooth in the oral cavity image; a fixture processing unit analyzing the tooth mask to generate a fixture corresponding to the lost tooth in the oral cavity image; and a guide forming unit forming a support portion extending from at least one side surface of the crown portion to cover at least a portion of a tooth mask surface of an adjacent tooth adjacent to the lost tooth.

[0010] The support portion includes an occlusal surface support portion made of a thin film that conforms to the shape of the tooth mask of the adjacent tooth while covering the occlusal surface of the tooth mask of the adjacent tooth, and a lateral support portion made of a thin film that conforms to the shape of the tooth mask of the adjacent tooth while covering an upper portion from the maximum fusion part of the tooth mask of the adjacent tooth among the mesial surface or the distal surface of the tooth mask of the adjacent tooth.

[0011] The method further includes a step of forming a guide hole having a central axis aligned with the vertical central axis of the fixture, an inner space for joining with the abutment from below, and a central axis aligned with the central axis of the inner space, and connected to the inner space from the upper surface of the crown portion.

[0012] In order to achieve the above-described object, a device for generating a model of a crown guide device according to a preferred embodiment of the present invention includes a data processing unit for obtaining a three-dimensional oral cavity image including a plurality of cross-sectional images of an area including a patient's teeth through cone beam computed tomography, a crown processing unit for detecting a tooth mask representing pixels occupied by teeth in the oral cavity image, and analyzing the tooth mask to generate a crown portion having a shape simulating a crown of a lost tooth on the oral cavity image, a fixture processing unit for analyzing the tooth mask to generate a fixture corresponding to the lost tooth on the oral cavity image, and a guide forming unit for forming a support portion that extends from at least one side of the crown portion and is formed to cover at least a portion of a tooth mask surface of an adjacent tooth adjacent to the lost tooth.

[0013] The support portion includes an occlusal surface support portion made of a thin film that conforms to the shape of the tooth mask of the adjacent tooth while covering the occlusal surface of the tooth mask of the adjacent tooth, and a lateral support portion made of a thin film that conforms to the shape of the tooth mask of the adjacent tooth while covering an upper portion from the maximum fusion part of the tooth mask of the adjacent tooth among the mesial surface or the distal surface of the tooth mask of the adjacent tooth.

[0014] The above guide forming part is characterized by having a central axis aligned with the vertical central axis of the fixture, an inner space for joining with the abutment from below, and a central axis aligned with the central axis of the inner space, and forming a guide hole connected to the inner space from the upper surface of the crown part.

[0015] According to the present invention, by applying a crown portion formed in a crown shape corresponding to a lost tooth to a surgical guide, the step of applying a temporary tooth can be omitted, thereby reducing the period of implant surgery.

[0016] FIG. 1 is a perspective view of a crown guide device having the functions of both a surgical guide and a prosthesis according to an embodiment of the present invention.

[0017] FIG. 2 is a cross-sectional view of a crown guide device having the functions of both a surgical guide and a prosthesis according to an embodiment of the present invention.

[0018] FIG. 3 is a plan view of the occlusal surface of a crown guide device having the functions of both a surgical guide and a prosthesis according to an embodiment of the present invention.

[0019] Figure 4 is a cross-sectional view of section AA of 3, looking in the direction of the nerve.

[0020] Fig. 5 is a plan view for explaining a crown portion according to an embodiment of the present invention.

[0021] FIG. 6 is a drawing for explaining the configuration of a device for generating a model of a crown guide device according to an embodiment of the present invention.

[0022] FIG. 7 is a flowchart illustrating a device method for generating a model of a crown guide device according to an embodiment of the present invention.

[0023] FIGS. 8 to 10 are flowcharts for explaining a device method for creating a model of a crown guide device according to an embodiment of the present invention.

[0024] FIG. 11 is a drawing showing a computing device according to an embodiment of the present invention.

[0025] Before going into a detailed description of the present invention, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and therefore, there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0026] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. It should be noted that, where possible, identical components are represented by identical reference numerals throughout the drawings. Furthermore, detailed descriptions of well-known functions and structures that may obscure the gist of the present invention will be omitted. For the same reason, some components in the attached drawings are exaggerated, omitted, or schematically depicted, and the sizes of each component do not fully reflect their actual sizes.

[0027] In particular, the terms and words used in this specification and claims described below should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted as meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term in order to explain his or her own invention in the best way.

[0028] In particular, in the embodiments of the present invention, the term "segmentation" will be used to mean specifying a target region through artificial neural network operations. For example, "segmenting" a tooth means specifying the tooth by distinguishing it from other regions. Those skilled in the art will understand the meaning of "segmentation" achieved through artificial neural network operations.

[0029] Additionally, in the embodiments of the present invention, terms such as occlusal surface, mesial surface, distal surface, and height of contour are defined according to medical terms.

[0030] When performing an implant procedure, the gingiva is incised to expose the alveolar bone, and a hole is formed thereon using a drill to implant the fixture. In an embodiment of the present invention, the "crown guide device" serves as an auxiliary device to guide the position of the hole formed in the alveolar bone and the implantation direction of the fixture when performing the drilling operation to form the aforementioned hole. At the same time, in an embodiment of the present invention, the "crown guide device" is a device that serves as a prosthesis for a lost tooth during an implant procedure. In addition, in an embodiment of the present invention, the "crown guide model" is a model formed using computer graphics to form the aforementioned crown guide device in real life.

[0031] First, a crown guide device having the functions of both a surgical guide and a prosthesis according to an embodiment of the present invention will be described. Fig. 1 is a perspective view of a crown guide device having the functions of both a surgical guide and a prosthesis according to an embodiment of the present invention. Fig. 2 is a cross-sectional view of a crown guide device having the functions of both a surgical guide and a prosthesis according to an embodiment of the present invention. Fig. 3 is a plan view of an occlusal surface of a crown guide device having the functions of both a surgical guide and a prosthesis according to an embodiment of the present invention. Fig. 4 is a cross-sectional view taken along the line AA of 3 and viewed in the mesial direction. Fig. 5 is a plan view for explaining a crown portion according to an embodiment of the present invention.

[0032] Referring to FIGS. 1 to 5, a crown guide device (10) according to an embodiment of the present invention includes a crown portion (110) and a support portion (120).

[0033] The crown portion (110) is formed in a crown shape corresponding to the lost tooth. This crown portion (110) serves as a prosthesis in an implant surgery procedure.

[0034] The support portion (120) is formed as a thin film that extends from at least one side of the crown portion (110) and covers at least a portion of the surface of the adjacent tooth (ad) adjacent to the lost tooth.

[0035] Referring to FIG. 2, the support member (120) includes an occlusal surface support member (121) and a side support member (122).

[0036] As shown in Fig. 3, the occlusal surface support portion (121) is formed as a thin film that conforms to the shape of the adjacent teeth while covering the occlusal surface of the adjacent teeth (ad).

[0037] The lateral support portion (122) is formed as a thin film conforming to the shape of the adjacent tooth while covering the upper portion from the height of contour of the adjacent tooth (ad) among the mesial surface or the distal surface of the adjacent tooth (ad). That is, the lateral support portion (122) is formed as a thin film conforming to the shape of the adjacent tooth while covering the upper portion from the height of contour of either the mesial surface or the distal surface of the adjacent tooth (ad).

[0038] The mesial surface is the part of the tooth that is visible when viewed in the mesial direction, and the distal surface is the part of the tooth that is visible when viewed in the distal direction. The mesial surface of an adjacent tooth (ad) refers to the part of the adjacent tooth (ad) that is visible when viewed in the mesial direction. The distal surface of an adjacent tooth (ad) refers to the part of the adjacent tooth (ad) that is visible when viewed in the distal direction.

[0039] For example, FIG. 4 illustrates a lateral support portion (122) formed to correspond to an adjacent tooth (ad) located in the mesial direction of the lateral support portion (122). As illustrated, the lateral support portion (122) is formed as a thin film conforming to the shape of the adjacent tooth (ad) while covering the upper portion from the height of contour of the mesial surface of the adjacent tooth (ad). The thickness of the lateral support portion (122) can be set to a minimum thickness depending on the strength of the material forming the crown guide device (10). Accordingly, when the support portion (120) is removed to use the crown portion (110) as a prosthesis, it can be easily removed.

[0040] Meanwhile, when an adjacent tooth (ad) is formed in the distal direction based on the crown portion (110), the lateral support portion (122) corresponding to the adjacent tooth (ad) is formed as a thin film that conforms to the shape of the adjacent tooth (ad) while covering the upper portion from the maximum fusion portion (height of contour) of the adjacent tooth (ad) among the distal surfaces of the adjacent tooth (ad).

[0041] Meanwhile, an inner space (111) and a guide hole (112) are formed in the crown portion (110).

[0042] The inner space (111) is created for bonding with the abutment (at) from the lower portion of the crown portion (110). The inner space (111) has a central axis aligned with the vertical central axis (X) of the fixture (fx), as illustrated in Fig. 5. In particular, the inner space (111) is shaped to match the shape of the abutment (at) for bonding with the abutment (at).

[0043] The guide hole (112) is used to guide the position of the hole formed in the alveolar bone and the implantation direction of the fixture (fx) in order to form a hole (Hole) in which the fixture (fx) is implanted using a drill in the alveolar bone. As illustrated in Fig. 5, the guide hole (112) has a central axis (vertical central axis) that is aligned with the vertical central axis (X) of the fixture (fx) or the central axis (vertical central axis) of the inner space (111). In addition, the guide hole (112) is connected to the inner space (111) from the upper surface of the crown portion (110).

[0044] The crown guide device according to the embodiment of the present invention as described above can serve as an auxiliary device for guiding the position of the hole formed in the alveolar bone by the practitioner and the implantation direction of the fixture (fx) through the support portion (120) formed to conform to the shape of the guide hole (112) and the adjacent teeth (ad). Furthermore, the crown guide device can serve as a prosthesis through the crown portion (110) by removing the support portion (120) after forming the hole formed in the alveolar bone. Accordingly, the step of applying a temporary tooth can be omitted, thereby having the advantage of reducing the period of implant surgery.

[0045] Next, a device for generating a model of a crown guide device according to an embodiment of the present invention will be described. Fig. 6 is a drawing for explaining the configuration of a device for generating a model of a crown guide device according to an embodiment of the present invention. Referring to Fig. 6, an image processing device (20) according to an embodiment of the present invention includes a model learning unit (210), a data processing unit (220), a crown processing unit (230), a fixture processing unit (240), and a guide forming unit (250).

[0046] The model learning unit (210) is for generating a segmentation model (SM). The model learning unit (210) can generate a segmentation model (SM) through learning (Deep Learning). When the model learning unit (210) generates a segmentation model (SM), it provides the generated segmentation model (SM) to the crown processing unit (230). When a processed image is input, the model learning unit (210) trains the segmentation model (SM) to detect a tooth mask representing the pixels occupied by the teeth by distinguishing the pixels occupied by the teeth from other pixels in the input oral image. The processed image according to an embodiment of the present invention is a three-dimensional image that combines a plurality of tomographic images. The plurality of tomographic images are images of the patient's tooth area obtained through cone beam computed tomography (CBCT).

[0047] The data processing unit (220) is for creating a three-dimensional oral image by combining multiple cross-sectional images of an area including the patient's teeth through cone beam computed tomography (CBCT).

[0048] The crown processing unit (230) is for detecting a tooth mask representing pixels occupied by teeth in an oral image. The crown processing unit (230) uses a segmentation model (SM: Segmentation Model) to distinguish pixels occupied by teeth from other pixels in the oral image and detects a tooth mask representing pixels occupied by teeth. The tooth mask segments each of a plurality of teeth. Accordingly, if a missing tooth exists, the tooth can be identified. In addition, the crown processing unit (230) is for analyzing the tooth mask to generate a crown unit (110) having a shape that simulates the crown of a missing tooth in the oral image.

[0049] The fixture processing unit (240) analyzes the tooth mask to create a fixture corresponding to a lost tooth in the oral image.

[0050] The guide forming portion (250) is intended to form a support portion (120) that extends from at least one side of the crown portion (110) and covers at least a portion of the tooth mask surface of the adjacent tooth (ad) adjacent to the lost tooth. In addition, the guide forming portion (250) can form an inner space (111) and a guide hole (112) in the crown portion (110).

[0051] The specific operations of the image processing device (20) including the model learning unit (210), data processing unit (220), crown processing unit (230), fixture processing unit (240), and guide forming unit (250) described above will be described in more detail below.

[0052] Next, a device method for generating a model of a crown guide device according to an embodiment of the present invention will be described. Fig. 7 is a flowchart for explaining a device method for generating a model of a crown guide device according to an embodiment of the present invention. Figs. 8 to 10 are flowcharts for explaining a device method for generating a model of a crown guide device according to an embodiment of the present invention.

[0053] Referring to FIG. 7, the data processing unit (220) combines multiple cross-sectional images of an area including the patient's teeth through cone beam computed tomography (CBCT) at step S110 to create a three-dimensional oral image.

[0054] The data processing unit (220) can basically acquire multiple tomographic images. The multiple tomographic images are captured using cone beam computed tomography (CBCT), and the captured area includes at least the patient's teeth area. These multiple tomographic images can be input by the user or directly from a connected radiographic imaging device (not shown). The data processing unit (220) can combine the multiple tomographic images to generate a three-dimensional oral cavity image.

[0055] Next, the crown processing unit (230) detects a tooth mask representing pixels occupied by teeth in the oral image at step S120.

[0056] According to one embodiment, the crown processing unit (230) uses a segmentation model (SM) to distinguish pixels occupied by teeth from other pixels in an oral cavity image, as illustrated in FIG. 8, and detects a tooth mask representing pixels occupied by teeth. The tooth mask segments each of a plurality of teeth. Accordingly, if a missing tooth exists, the corresponding tooth can be identified.

[0057] Next, the crown processing unit (230) analyzes the tooth mask in step S130 to generate a crown portion (110) having a shape that mimics the crown of a lost tooth on the oral cavity image. In other words, the crown processing unit (230) generates a crown portion (110) having a crown shape corresponding to a lost tooth on the oral cavity image.

[0058] According to one embodiment, the crown processing unit (230) can basically derive the location of a lost tooth according to a tooth mask. In addition, the crown processing unit (230) can identify the type of a lost tooth according to the location of the lost tooth, and derive the basic shape of the lost tooth according to the type of the identified lost tooth. The crown processing unit (230) can receive the patient's age, gender, and race from the user, and derive or adjust the size and shape of the crown portion (110) corresponding to the input age, gender, and race. In addition, the crown processing unit (230) can derive or adjust the size and shape of the crown portion (110) according to a proportional relationship with an adjacent tooth, which is a normal tooth derived through the tooth mask. In addition, the crown processing unit (230) can derive or adjust the size and shape of the crown portion (110) according to a symmetry and occlusal relationship with at least one of a symmetrical tooth and an occlusal tooth, which are normal teeth derived through the tooth mask. For example, the crown processing unit (230) can derive or adjust the size and shape of the crown portion (110) according to the symmetrical relationship between the symmetrical tooth (st) and the missing tooth (mt), as shown in (A) of FIG. 9. In addition, the crown processing unit (230) can derive or adjust the size and shape of the crown portion (110) according to the occlusion relationship between the occlusal tooth (ot) and the missing tooth (mt), as shown in (B) of FIG. 9.

[0059] Next, in step S140, the fixture processing unit (240) analyzes the tooth mask (TM) to create a fixture corresponding to the missing tooth in the oral cavity image. It should be understood that the "fixture" here refers to a three-dimensional model, not an actual tooth. Step S140 will be described in more detail as follows.

[0060] First, the fixture processing unit (240) performs the following procedure on at least one normal tooth among the adjacent teeth, symmetrical teeth, and occlusal teeth corresponding to the lost teeth.

[0061] Referring to FIG. 10, the fixture processing unit (240) derives two centers of gravity (cg1, cg2) of horizontal cross-sections of different heights of a normal tooth from an oral image. Then, the fixture processing unit (240) derives an insertion vector (IV), which is a unit vector for indicating the direction in which the fixture is inserted, from the center of gravity at a higher position to the center of gravity at a lower position among the two centers of gravity (cg1, cg2). Then, the fixture processing unit (240) derives the starting point of the root of the normal tooth using the insertion vector, and derives fixture coordinates (CO) indicating the position of the end of the fixture such that the head of the fixture is exposed from the root according to the type of tooth having different heights from the starting point of the root. Subsequently, the fixture processing unit (240) places the fixture in the normal tooth according to the insertion vector (IV) and the fixture coordinates (CO).

[0062] As described above, when a fixture of a normal tooth corresponding to a lost tooth, which is at least one of an adjacent tooth, a symmetrical tooth, and an occlusal tooth, is placed, the fixture processing unit (240) can place the fixture of the lost tooth using at least one of a proportional relationship with the adjacent tooth, a corresponding relationship with the symmetrical tooth, and an occlusal relationship with the occlusal tooth.

[0063] Next, referring to FIGS. 1 to 4, in step S150, the guide forming portion (250) forms a support portion (120) that extends from at least one side of the crown portion (110) to cover at least a portion of the tooth mask surface of the adjacent tooth (ad) adjacent to the lost tooth.

[0064] As described above, the support portion (120) includes an occlusal surface support portion (121) and a lateral support portion (122). The occlusal surface support portion (121) is formed as a thin film that conforms to the shape of the tooth mask of the adjacent tooth (ad) while covering the occlusal surface of the tooth mask of the adjacent tooth (ad). The lateral support portion (122) is formed as a thin film that conforms to the shape of the tooth mask of the adjacent tooth while covering the upper portion from the height of contour of the tooth mask of the adjacent tooth (ad) among the mesial surface or the distal surface of the tooth mask of the adjacent tooth (ad).

[0065] Next, the guide forming unit (250) completes the crown guide model (M) including the crown portion (110) and the support portion (120) by forming an inner space (111) and a guide hole (112) in the crown portion (110) at step S160. At this time, the inner space (111) is created for coupling with the abutment (at) from the lower portion of the crown portion (110). As illustrated in FIG. 5, the inner space (111) has a central axis aligned with the vertical central axis (X) of the fixture (fx). In particular, the inner space (111) is conformed to the shape of the abutment (at) for coupling with the abutment (at). The guide hole (112) is for guiding the position of the hole formed in the alveolar bone and the implantation direction of the fixture in order to form a hole (Hole) into which the fixture (fx) is implanted using a drill in the alveolar bone. As illustrated in Fig. 5, this guide hole (112) has a central axis aligned with the vertical central axis (X) of the fixture (fx) or the central axis of the inner space (111). In addition, the guide hole (112) is connected to the inner space (111) from the upper surface of the crown portion (110).

[0066] As described above, the crown guide model (M) including the generated crown portion (110) and support portion (120) is a three-dimensional computer graphic, and the crown guide device (10) can be manufactured based on this three-dimensional computer graphic. According to one embodiment, the crown guide device (10) can be manufactured from the crown guide model (M) through 3D printing. In addition, the crown guide device (10) can be manufactured from the crown guide model (M) in various ways.

[0067] Fig. 11 is a diagram illustrating a computing device according to an embodiment of the present invention. The computing device (TN100) of Fig. 11 may be a device described in this specification, for example, an image processing device (20).

[0068] In the embodiment of FIG. 11, the computing device (TN100) may include at least one processor (TN110), a transceiver (TN120), and a memory (TN130). In addition, the computing device (TN100) may further include a storage device (TN140), an input interface device (TN150), an output interface device (TN160), and the like. The components included in the computing device (TN100) may be connected by a bus (TN170) to communicate with each other.

[0069] The processor (TN110) can execute program commands stored in at least one of the memory (TN130) and the storage device (TN140). The processor (TN110) may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor in which methods according to embodiments of the present invention are performed. The processor (TN110) may be configured to implement procedures, functions, methods, etc. described in relation to embodiments of the present invention. The processor (TN110) may control each component of the computing device (TN100).

[0070] The memory (TN130) and the storage device (TN140) can each store various information related to the operation of the processor (TN110). The memory (TN130) and the storage device (TN140) can each be configured with at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory (TN130) can be configured with at least one of a read-only memory (ROM) and a random access memory (RAM).

[0071] The transceiver (TN120) can transmit or receive wired or wireless signals. The transceiver (TN120) can be connected to a network to perform communication.

[0072] In particular, the model learning unit (210), data processing unit (220), crown processing unit (230), fixture processing unit (240), and guide forming unit (250) according to an embodiment of the present invention may be implemented in the form of a program readable by a computer, stored in a memory (TN130), and then executed by a processor (TN110), or may become a sub-module of the processor (TN110).

[0073] Meanwhile, the method according to the embodiment of the present invention described above may be implemented in the form of a program readable by various computer means and recorded on a computer-readable recording medium. Here, the recording medium may include program commands, data files, data structures, etc., singly or in combination. The program commands recorded on the recording medium may be those specially designed and configured for the present invention, or may be those known and usable by those skilled in the art of computer software. For example, the recording medium includes magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and hardware devices specially configured to store and execute program commands, such as ROMs, RAMs, and flash memories. Examples of program commands may include not only machine language wires generated by a compiler, but also high-level language wires that can be executed by a computer using an interpreter, etc. These hardware devices may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

[0074] While the present invention has been described using several preferred embodiments, these embodiments are illustrative and not limiting. As such, those skilled in the art will appreciate that various changes and modifications can be made in accordance with the doctrine of equivalents without departing from the spirit of the invention and the scope of the claims.

Claims

1. In the crown guide device, A crown portion formed in a crown shape corresponding to the lost tooth; and A support portion formed to extend from at least one side of the crown portion and cover at least a portion of a surface of an adjacent tooth adjacent to the lost tooth; characterized by including Crown guide device.

2. In paragraph 1, The above support An occlusal surface support portion of a thin film that covers the occlusal surface of the adjacent teeth and conforms to the shape of the adjacent teeth; and A lateral support portion of a thin film that conforms to the shape of the adjacent tooth and covers the upper portion from the maximum fusion part of the adjacent tooth among the mesial or distal surfaces of the adjacent tooth; characterized by including Crown guide device.

3. In paragraph 1, The above crown part It has a central axis aligned with the vertical central axis of the fixture and an inner space for joining with the abutment from below. It is characterized in that it has a central axis aligned with the central axis of the inner space and a guide hole is formed from the upper surface of the crown portion to connect to the inner space. Crown guide device.

4. A method for creating a model of a crown guide device, A step of the data processing unit obtaining a three-dimensional oral image including multiple cross-sectional images of an area including the patient's teeth through cone beam computed tomography; A step of detecting a tooth mask representing pixels occupied by teeth in the above oral cavity image by the crown processing unit; A step in which the crown processing unit analyzes the tooth mask to create a crown unit having a shape that mimics the crown of a lost tooth in the oral cavity image; A step in which a fixture processing unit analyzes the tooth mask to generate a fixture corresponding to a missing tooth in the oral image; A step of forming a support portion in which a guide forming portion extends from at least one side of the crown portion and covers at least a portion of a tooth mask surface of an adjacent tooth adjacent to the lost tooth; characterized by including A method for creating a model.

5. In paragraph 4, The above support An occlusal surface support portion of a thin film that conforms to the shape of the tooth mask of the adjacent tooth while covering the occlusal surface of the tooth mask of the adjacent tooth; and A lateral support portion of a thin film that conforms to the shape of the tooth mask of the adjacent tooth while covering the upper portion from the maximum fusion part of the tooth mask of the adjacent tooth among the mesial surface or the distal surface of the tooth mask of the adjacent tooth; characterized by including A method for creating a model.

6. In paragraph 4, A step of forming a guide hole having a central axis aligned with the vertical central axis of the fixture, an inner space for joining with an abutment from below, and a central axis aligned with the central axis of the inner space, and connected to the inner space from the upper surface of the crown portion; characterized by further including A method for creating a model.

7. In a device for creating a model of a crown guide device, A data processing unit that obtains a three-dimensional oral image including multiple cross-sectional images of an area including a patient's teeth using cone beam computed tomography; Detecting a tooth mask representing pixels occupied by teeth in the above oral image, A crown processing unit that analyzes the above tooth mask and creates a crown portion having a shape that mimics the crown of a lost tooth on the oral cavity image; A fixture processing unit that analyzes the above tooth mask and generates a fixture corresponding to a lost tooth on the oral image; and A guide forming portion that forms a support portion that extends from at least one side of the crown portion and covers at least a portion of a tooth mask surface of an adjacent tooth adjacent to the lost tooth; characterized by including A device for generating models.

8. In paragraph 7, The above support An occlusal surface support portion of a thin film that conforms to the shape of the tooth mask of the adjacent tooth while covering the occlusal surface of the tooth mask of the adjacent tooth; and A lateral support portion of a thin film that conforms to the shape of the tooth mask of the adjacent tooth while covering the upper portion from the maximum fusion part of the tooth mask of the adjacent tooth among the mesial surface or the distal surface of the tooth mask of the adjacent tooth; characterized by including A device for generating models.

9. In paragraph 7, The above guide forming part It is characterized by having a central axis aligned with the vertical central axis of the fixture, an inner space for joining with the abutment from below, and a central axis aligned with the central axis of the inner space, and forming a guide hole connected to the inner space from the upper surface of the crown portion. A device for generating models.

Images