KR102013667B1 - Method for designing a dental surgical guide, apparatus, and recording medium thereof - Google Patents

Abstract

The present invention relates to a method for designing a dental surgical guide, an apparatus therefor, and a recording medium recording the same. According to the method for designing a dental surgical guide according to the present invention, an oral scan image is generated when a panoramic image is generated by reconstructing a CT image. It is created using the gingival plane and the arch line generated in. The gingival plane is also used in implant placement simulation and surgical guide design.
According to this, not only can the panorama image be more accurately generated, but also the efficiency of the overall digital design process of the surgical guide can be achieved.

Description

TECHNICAL FOR DESIGNING A DENTAL SURGICAL GUIDE, APPARATUS, AND RECORDING MEDIUM THEREOF}

The present invention relates to a method for designing a dental surgical guide, an apparatus for the same, and a recording medium recording the same, and more particularly, a method for digitally designing a surgical guide for guiding an implant procedure, an apparatus for the same, and recording the same. It relates to a recording medium.

An implant procedure for replacing a tooth involves dissecting a gingiva to expose the alveolar bone, and using a drill to form a hole in which a fixture is placed. As described above, the surgeon guide is used as an auxiliary device for guiding the position of the hole formed in the alveolar bone and the implantation direction of the fixture when the operator forms the hole.

1 is a view showing a schematic structure of a surgical guide.

Referring to FIG. 1, a surgical guide includes a guide hole 1a through which a drill is inserted when forming a hole in an alveolar bone, a drill guide 1b for guiding a drill position, and a guide support for supporting the drill guide. (1c). Here, the guide support may be formed to cover the entire tooth, but may be partially formed to cover only the peripheral teeth and the surrounding gingival surfaces positioned close to the target tooth according to the number and position of the implant target tooth.

The surgical guide is designed on a software program, and is actually generated by outputting it to a 3D printer or the like according to the design result. The digital design of the surgical guides varies slightly from program to program, but generally goes through data pre-preparation, implant planning, and surgical guide design.

Here, a tooth panoramic image is utilized when performing implant planning to determine the position or orientation of implantation, including crowns, abutments, and fixtures. According to the prior art, CT From the data, the user determines an axial image to generate a panoramic image, and a panoramic image is generated based on the dental arch defined in the corresponding axial sectional image.

As described above, according to the prior art, a panoramic image is generated entirely based on CT data. However, most implant patients have experienced prosthetic treatments, and thus, since the patient's CT data includes many artifacts due to prostheses, there are many difficulties in defining an accurate dental arch line. As a result, a large number of errors are generated in the panorama image generated according to the prior art, which affects the overall design process, thereby lowering the accuracy of the design of the surgical guide and ultimately impairing the satisfaction of the implant procedure.

[Previous Technical Document] Korean Patent Registration No. 10-1706335

The present invention is proposed to solve the problem of the prior art that the accuracy of the design of the surgical guide is reduced by performing the implant planning based on the panoramic image generated solely based on the CT data, thereby impairing the satisfaction of the implant procedure, To provide a method for designing a dental surgical guide, a device therefor, and a recording medium recording the same, which can improve the accuracy in generating a panoramic image and improve the design efficiency throughout the process of designing the surgical guide. do.

According to an aspect of the present invention, there is provided a method of designing a surgical guide, the method for designing a dental surgical guide digitally on a computer, the method comprising: obtaining a CT image and an oral scan image of a patient; Defining at least one dot on the oral scan image; Generating a gingival plane in which the at least a portion of the plane abuts the gingival upper boundary based on the defined point; Generating an arch form line on the oral cavity scan image; Registering the oral cavity scan image and the CT image; And a panoramic image based on the gingival plane in the CT image corresponding to the gingival plane of the oral cavity scan image derived by the registration and the dental arch line in the CT image corresponding to the dental arch line of the oral cavity scan image. It may comprise the step of generating.

Here, the step of defining at least one or more points in the oral scan image may be performed by automatically recognizing the points by an input through a user interface unit or according to a pre-set reference.

In addition, the generating of the gingival plane may be performed such that at least a portion of the gingival plane is in contact with the upper boundary of the gingiva close to the missing tooth corresponding to the implant target.

In addition, the upper gingiva boundary which at least a portion of the gingiva plane is in contact with the free gingiva and the boundary of the tooth or the boundary of the teat gingiva may be applied.

The dental surgical guide design method may further include generating a crown in a region where a tooth is missing from the oral cavity scan image or the CT image, and the crown may be generated to be positioned on the arch line. have.

In this case, in the generating of the crown, the crown may be generated so that the lower portion of the crown does not exceed the gingival plane more than a predetermined reference.

In addition, the dental surgical guide design method provides an implant placement simulation for determining the position, size, angle of the implant object based on at least one of the oral scan image, the panoramic image, and the CT image. step; And designing a surgical guide based on a result of the implant placement simulation.

The designing of the surgical guide may include determining a thickness of the support of the surgical guide for covering the gingival of the patient based on the position of the gingival plane.

On the other hand, the dental surgical guide design apparatus according to another aspect of the present invention is a dental surgical guide design device for performing a computer-aided design of the dental surgical guide, at least one defined in the oral scan image of the patient A gingival plane generating unit generating a gingival plane in which at least a portion of the plane is in contact with the upper boundary of the gingiva on the oral cavity scan image based on the above points; An arch arch generating unit generating an arch arch line on the oral cavity scan image; An image registration unit matching the oral scan image and the CT image of the patient; And a base of the dental arch in the CT image corresponding to the gingival plane of the CT image corresponding to the gingival plane of the oral cavity scan image derived by registration through the image registration unit and the dental arch line of the oral scan image. And a panorama image generator for generating a panorama image.

In addition, the dental surgical guide design apparatus includes a simulation providing unit for providing an implant placement simulation for determining the position, size, angle of the implant object; And a guide design unit configured to design a surgical guide based on a result of the implant placement simulation by the simulation provider.

As described above, according to the present invention, an accurate panoramic image can be generated using an arch line line defined on the basis of the complete shape of the entire tooth shown in the oral scan image, through which implant planning and surgical guide are performed. Improve the accuracy of your design.

In addition, according to the present invention, it is possible to improve efficiency throughout the design process by utilizing the panoramic image generation, implant planning, and surgical guide design based on the plane defined in the oral scan image.

1 shows a schematic structure of a surgical guide;
Figure 2 is a block diagram showing the configuration of a dental surgical guide design apparatus according to an embodiment of the present invention;
3 is a reference diagram for explaining the gingival plane according to an embodiment of the present invention;
4 is an example of a screen displaying an oral scan image in which a gingival plane and an arch line are generated according to an embodiment of the present invention;
5 is a flowchart of a method for designing a dental surgical guide according to an embodiment of the present invention;
6 is an example of a screen displaying the surgical information created in the dental surgical guide design process according to an embodiment of the present invention; And
7 is an example of a screen for defining an area of a surgical guide in a dental surgical guide design process according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the following description and the accompanying drawings, detailed descriptions of well-known functions or configurations that may obscure the subject matter of the present invention will be omitted. In addition, it should be noted that like elements are denoted by the same reference numerals as much as possible throughout the drawings.

The terms or words used in the specification and claims described below should not be construed as being limited to ordinary or dictionary meanings, and the inventors are appropriate as concepts of terms for explaining their own invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all of the technical ideas of the present invention, and various alternatives may be substituted at the time of the present application. It should be understood that there may be equivalents and variations.

Dental surgical design device according to the present invention is to perform a computer-assisted virtual design of the surgical guide as an aid for guiding the drilling position, the drilling depth, the fixture placement direction of the drill when drilling the alveolar bone for implant treatment, In addition to the surgical guide design itself, it provides the entire process required for the surgical guide design, including imaging and processing and implant planning used in the surgical guide design.

Figure 2 is a block diagram showing the configuration of a dental surgical guide design apparatus according to an embodiment of the present invention. Referring to FIG. 2, the surgical guide apparatus 100 for dental surgery according to the embodiment of the present invention includes a user interface unit 10, a gingival plane generating unit 20, an arch form generating unit 30, and an image matching unit. 40, a panoramic image generating unit 50, a simulation providing unit 60, and a guide designing unit 70.

The user interface unit 10 inputs necessary information from the user and displays various types of information, including input means for inputting information such as a mouse, keyboard, buttons, keypad, input menu and processing results, and the like. It can be implemented as a variety of input and output means, including a display means, a touch screen for providing input and output through one device.

The gingival plane generating unit 20 generates a gingival plane based on at least one or more points defined in the oral scan image scanning the oral cavity of the patient. For reference, the oral scan image may be obtained by scanning through an oral scanner or a model scanner.

The gingival plane is a plane corresponding to the gingival upper boundary, at least a portion of the gingival plane abuts the gingival upper boundary.

3 is a reference diagram for describing a gingival plane according to an embodiment of the present invention.

Referring to FIG. 3, Margin gingiva 301 is a collar-shaped gingival surrounding an alveolar region of a tooth, and Papillary gingiva 303 is a triangle between a tooth and a tooth. Pyramid-shaped gingiva that fills the space.

Here, the upper gingival boundary of at least a portion of the gum plane may be the boundary b1 between the tooth and the free gingiva or the boundary b2 of the nipple gingiva.

On the other hand, since it is obvious that the heights of the gingiva are different so that they do not exist on one plane, the gingival plane does not need to touch all the gingival upper boundaries, and a part of the planes may be created to contact some gingival upper boundaries. have. In this case, the gingival plane may be generated to contact the upper boundary of the gingiva close to the missing tooth to be implanted. In this manner, the gingival plane may be usefully used when performing implant procedure planning or designing a surgical guide.

On the other hand, the at least one or more points may be directly input by the user through the user interface unit 10, or may be defined by automatically recognizing the corresponding location according to a pre-set criteria. Although the number of points to be defined is not particularly limited, it is preferable to input three points to generate one plane.

If less than three points are input, a plane including the input points is generated, and the specific slope of the plane may be determined by applying statistical data or reference data regarding the position or angle of the gingiva. In addition, when more than three points are defined, a plane including all points may not exist. In this case, one plane that is closest to the most defined points may be determined by interpolating based on the positions of the points. . To this end, the gingival plane generator 20 may store reference data or an interpolation algorithm for generating the gingival plane.

The arch generating unit 30 generates an arch form line on the oral scan image. The arch line is a curve drawn by the teeth, and may be generated based on a point input by the user through the user interface unit 10 or a point recognized through image processing. For example, the arch form generating unit 30 may generate an arch form by recognizing an insulator of an anterior tooth, a peak of a canine, a peak of a buccal cusp of a molar tooth, and the like.

4 illustrates an example of a screen displaying an oral scan image in which a gingival plane and an arch line are generated according to an exemplary embodiment of the present invention.

The area A on the screen is a mandibular scan image in which the gingival plane (GP) and the dental arch line (DL) are overlapped, and the area B is a mandibular scan image according to various angles. The position of (P1, P2, P3) can be grasped.

Referring to FIG. 4, it is shown that the gingival plane is formed to include three points P1, P2, and P3. It can be seen that P1, P2, and P3 are located on the upper gingival boundary, respectively.

For reference, FIG. 4 shows an example in which the gum plane is generated to contact the nipple gingiva, but as described above, the gum plane may be generated to contact the boundary between the tooth and the free gingiva.

The point for creating the gingival plane is not particularly limited as long as it exists on or near the upper gingival boundary, but the gingival plane is located at a plurality of points spaced apart from each other as shown in FIG. 4 to reflect the entire gingival boundary as much as possible. It is desirable to.

On the other hand, the arch line in Figure 4 shows an example created using three points as the point (P4) between the anterior teeth, the point (P5, P6) between the molar tooth, but the position and the number of the point is necessarily limited thereto. Rather, the arch line may be determined manually or automatically in the appropriate position and number so that the arch line is formed close to the patient's arch form.

The arch arch generating unit 30 may arrange a control point (CP) on the arch line line generated as shown in FIG. 4 to allow the user to adjust the shape or length of the arch line.

The image registration unit 40 registers the oral scan image and the CT image. For reference, the CT image may be obtained by photographing through various CT equipment including CBCT (Cone Beam Computed Tomography) equipment.

The image matching unit 40 receives a feature point, which is a reference for image matching, from the user through the user interface unit 10, or brightness in all directions or edges in which the brightness value of the pixel is rapidly changed in one direction. The two images may be matched by automatically recognizing the point of the image matching, such as the corner, which is a value change portion. Matching may be performed by various matching algorithms based on the characteristics of the image, and is not limited to a specific scheme.

The panoramic image generator 50 generates a panoramic image by reconstructing the CT image. For reference, the panoramic image is an image widely used in dental diagnosis to observe the state of the entire tooth, and various techniques for generating the tooth panoramic image from the CT image have been introduced.

When reconstructing a CT image to generate a panoramic image, an axis section and an arch line to generate the panoramic image are required. The panoramic image generating unit 50 is a panoramic image based on the gingival line in the CT image corresponding to the gingival plane generated from the oral cavity scan image and the dental arch line in the CT image corresponding to the dental arch line generated in the oral cavity scan image. Create Here, the gingival plane and the arch line in the CT image corresponding to the gingival plane and the arch line generated in the oral scan image can be easily derived based on the image registration result.

The panoramic image generating unit 50 applies various projection techniques for reconstructing the three-dimensional CT image to generate a two-dimensional panoramic image, so that the oral scan image is on the plane in the CT image corresponding to the gingival plane of the oral scan image. The panoramic image may be generated based on a curve corresponding to the arch line of the.

According to the present invention, the user's convenience is greatly improved because there is no need to find and select an axis cross section for generating a panoramic image from a CT image as in the prior art, and soft tissues such as gingiva are clearly revealed and prosthetic By using the defined gingival plane and the arch line in the oral scan image that does not exist due to the artifacts, it is possible to generate a clearer and clearer panoramic image. Since panoramic images are also used in subsequent implant placement simulations, the importance of the panorama image is directly related to the accuracy of implant planning.

The simulation provider 60 measures the size of the implant object based on the reconstructed CT image including the oral scan image, the CT image, the image of the two images, and the panoramic image and the Multi Planar Reformation (MPR) image. Implant placement simulation is provided to determine the location, angle, and the like. For reference, the implant object is an object constituting the implant and includes a fixture, a crown, an abutment, and the like.

The simulation provider 60 arranges the implant object in an image and changes the position, size, angle, etc. of the object in response to a user input through the user interface 10. In this case, since the oral scan image and the CT image are matched and the coordinate systems are shared with each other, when the simulation is performed on any one of the oral scan image and the CT image, the simulation result may be reflected on the other image.

The simulation provider 60 may place an implant object in the missing region detected through image recognition, and at this time, the distance between adjacent teeth and fixtures, the distance between adjacent fixtures, the size of each tooth, and the missing tooth number are suitable. Medically verified and recommended procedure guide information such as information for selecting an implant object or reference information or statistical information empirically verified by a user may be stored and placed in an appropriate location based on the information.

As such, the simulation provider 60 may provide various functions for implantation simulation of the implant object. Hereinafter, for simplicity, the description will be mainly focused on elements that are different from the conventional simulation program.

The simulation provider 60 generates a crown in a region where a tooth is missing from an oral scan image or a CT image. In this case, the simulation provider 60 generates a crown to be positioned on the dental arch line defined in the oral scan image. For example, the simulation provider 60 may place the crown such that the center of the crown crosses the arch line.

In addition, the simulation provider 60 generates the lower portion of the crown so that the gingival plane does not exceed a predetermined reference. This is because the crown is virtually above the gingival and cannot invade much of the gingival area. As such, the simulation providing unit 70 utilizes the gingival plane to determine the maximum range in which the lower part of the crown can be located, thereby allowing the user to roughly determine the position of the gingival and to correct the operation compared to the prior art of arranging the crown. This can be minimized and the crown position can be more accurately determined.

The simulation provider 60 provides an implantation simulation of another implant object for determining the length, size, position, etc. of the fixture, abutment, etc. based on the position of the crown arranged. Fixtures and abutments are automatically arranged in correspondence with the crown position, and the user may modify the length, size, position, etc. of the implant object through the user interface unit 10.

The guide design unit 70 designs the surgical guide based on the implant placement simulation result of the simulation providing unit 60. The guide design unit 70 is a guide hole into which a drill for drilling the alveolar bone is inserted corresponding to the fixture insertion position, a pillar shape including a guide hole therein, a drill guide for guiding the drill's position, and a cover to the gingiva to cover the drill guide. Design guide supports, etc. to support.

On the other hand, the thickness of the guide support is important in the implant procedure, for example, if the support is too thin, there is a risk that the guide may not move when the drill is driven because the surgical guide is not well fixed to the patient's mouth, on the contrary, the thickness is too thick. There is a possibility of causing pain in the patient during the procedure. Therefore, it is necessary to appropriately determine the thickness of the guide support.

The guide design unit 70 determines the thickness of the guide support based on the position of the gingiva plane generated by the gingival plane generating unit 20 when designing the guide support. This allows the user to design a surgical guide tailored to the oral cavity of the patient as compared to the prior art in which the user arbitrarily determines the thickness of the guide support.

5 is a flowchart of a method for designing a dental surgical guide according to an embodiment of the present invention, and FIGS. 6 and 7 are reference diagrams for explaining a method for designing a dental surgical guide. Hereinafter, the organic operation of the dental surgical guide design apparatus 100 described above will be described with reference to FIGS. 5 to 7.

First, referring to FIG. 5, it is assumed that the dental surgical guide design apparatus 100 acquires a CT image and an oral scan image of a patient who needs an implant procedure through a CT device or an oral scanner (S10). In addition, image preprocessing processes such as noise processing or correction of tilt in CT images and oral scan images can be performed.In addition, information necessary for the patient's personal information and the design of surgical guides or predetermined information related to the design can be performed. For example, a process of creating implant procedure information such as a kit type, a fixture type, a guide hole type, a sleeve type, etc. to be used for the implant procedure may be preceded.

6 shows an example of a screen on which the created surgical information is displayed as described above.

Subsequently, the gingival plane and the arch line are generated from the oral cavity scan image (S20).

The gingival plane generating unit 20 may generate a gingival plane in which at least a portion of the plane is in contact with a portion of the gingival upper boundary, based on a point input through the user interface unit 10, or in the oral scan image. It may be implemented to recognize the points on the gingival upper boundary through processing such as shape to automatically generate the gingival plane.

On the other hand, considering that the gingival plane is utilized in the simulation and implant guide design for implant planning, it is preferable that the gingiva plane is generated to contact the boundary of the gingiva close to the missing tooth to be implanted. To this end, the gingival plane generating unit 20 may recognize a region where a tooth is missing and may display a guide box for guiding an area in which a point is to be input around the corresponding area to induce a point to be input around the tooth loss area. There will be. In addition, even when three or more points are input and interpolation is required, weights may be differently applied depending on whether the distance to the tooth loss area is close.

Like the gingival plane, the arch arch generating unit 30 may generate an arch arch line based on a point input by a user through the user interface unit 10 or a point recognized through image processing.

As such, when the gingival plane and the arch line are generated from the oral scan image, registration of the oral scan image and the CT image is performed through the image matching unit 40 (S30).

The registration of the oral cavity scan image and the CT image may be performed by various matching algorithms based on the characteristics of the image. In this case, the feature point, which is a reference of the matching, may be determined by a user input through the user interface unit 10 or image analysis. Through this, positions corresponding to each other in two images may be automatically extracted. In this case, the points utilized in generating the gingival plane may be used as the feature point. For this purpose, the image matching unit 40 may provide the user with the points utilized in the gingival plane generation in the oral scan image. According to this, convenience is increased because the number of feature points to be input by the user is reduced.

When the registration is completed, the plane and the line in the CT image corresponding to the gingival plane and the arch line generated in the oral cavity scan image can be identified through the image registration result. Using this, the panoramic image generation unit 50 may use the panoramic image based on the gingival plane in the CT image corresponding to the gingival plane of the oral scan image and the dental arch line in the CT image corresponding to the dental arch line of the oral scan image. To generate (S40).

Subsequently, implant placement simulation is performed to determine the position, size, and angle of the implant object constituting the implant, such as a crown, fixture, or abutment, through the simulation provider 60 (S50). The simulation may be based on oral scan images, CT images including reconstructed images, panoramic images, registration images, and the like.

In the simulation process, the simulation provider 60 may generate a crown on the generated arch line, but may not generate a lower portion of the crown so as not to fall beyond the predetermined reference.

Furthermore, the simulation providing unit 60 provides a user with an alarm message about the crown correction when the position of the crown under the gingival plane exceeds a predetermined reference or more through the user interface unit 10, thereby achieving more successful implant planning. You can plan.

Next to the crown, when the implantation simulation of other implant objects such as fixtures and abutments is also completed, the surgical guide is then designed based on the simulation result (S60). At this time, the guide design unit 70 determines the thickness of the support for covering the gingiva of the patient based on the position of the gingiva plane.

7 is an example of a screen provided in a surgical guide design process, and illustrates a screen for defining an area of a surgical guide.

Referring to FIG. 7, the region R of the surgical guide is an area in which the surgical guide is mounted on the oral cavity of the patient in the form of covering the gingival, and is indicated in green.

In FIG. 7, the region R of the surgical guide may be viewed from the side through the images 701 and 703 displayed on the right side. As shown in the two images 701 and 703, the thickness of the region R of the surgical guide corresponding to the extent of covering the gingiva may be set corresponding to the position of the gingival plane GP generated from the oral scan image. .

For reference, FIG. 7 shows an example in which the thickness of the region R of the surgical guide is set to match the position of the gingival plane GP, but covers the gingival by a predetermined distance more than the position of the gingival plane GP. It may be created or may be created at a position raised higher in the tooth direction than the gingival plane GP.

As such, although the thickness of the region R of the surgical guide is generated based on the position of the gingival plane GP, the thickness of the specific support relative to the position of the gingival plane GP may be determined differently according to a user or device setting. In addition, it is a matter of course that the user can adjust the area R of the surgical guide primarily automatically set based on the position of the gingival plane GP or the form of the arch form. On the other hand, the user can refer to the location of the gingival plane on the image for the design of the surgical guide during adjustment, and when the user adjusts the thickness of the support so as to be spaced apart from the gingival plane by a predetermined distance, an alarm message is provided. You can do it.

Meanwhile, each of the above-described steps may be modified, added or changed in order as necessary.

For example, in the flowchart of FIG. 5, the implant placement simulation is performed after the image registration, but the position and size of the crown is preceded in the oral scan image, and then the image registration is performed to perform simulation on another implant object such as a fixture. It may be implemented to perform. As such, the implant placement simulation may be performed before or after image registration for each implant object, and the simulation of all the implant objects may not necessarily be performed continuously.

According to the related art, by generating a panoramic image based solely on a CT image, it is difficult to accurately draw an arch form line for generating a panoramic image and setting a crown position due to artifacts caused by a prosthesis, and to generate a panoramic image from a CT image. There was a problem that the user must find one by one.

However, according to the apparatus and method for designing a dental surgical guide according to the present invention, it is possible to effectively solve the problems of the prior art by generating a panoramic image based on the dental arch line and the gingival plane generated from the oral cavity scan image, It can be used not only for generating panoramic images, but also for implant placement simulation and surgical guide design, thereby improving accuracy and efficiency throughout the design process.

Meanwhile, the method for designing a dental surgical guide according to the present invention may be implemented as a program that can be executed in a computer, and may be implemented as various recording media such as a magnetic storage medium, an optical reading medium, and a digital storage medium.

Implementations of the various techniques described herein may be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or in combinations of them. Implementations may be implemented for processing by, or to control the operation of, a data processing device, eg, a programmable processor, a computer, or multiple computers, a computer program product, ie an information carrier, for example a machine readable storage. It may be embodied as a computer program recorded on a device (computer readable medium). Computer programs, such as the computer program (s) described above, may be written in any form of programming language, including compiled or interpreted languages, and may be written as standalone programs or in modules, components, subroutines, or computing environments. It can be deployed in any form, including as other units suitable for use. The computer program can be deployed to be processed on one computer or multiple computers at one site or distributed across multiple sites and interconnected by a communication network.

Processors suitable for the processing of a computer program include, by way of example, both general purpose and special purpose microprocessors, and any one or more processors of any kind of digital computer. In general, a processor will receive instructions and data from a read only memory or a random access memory or both. Elements of a computer may include at least one processor that executes instructions and one or more memory devices that store instructions and data. In general, a computer may include one or more mass storage devices that store data, such as magnetic, magneto-optical disks, or optical disks, or receive data from, transmit data to, or both. It may be combined to be. Information carriers suitable for embodying computer program instructions and data include, for example, semiconductor memory devices, for example, magnetic media such as hard disks, floppy disks, and magnetic tape, compact disk read only memory. ), Optical media such as DVD (Digital Video Disk), magneto-optical media such as floppy disk, ROM (Read Only Memory), RAM , Random Access Memory, Flash Memory, Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), and the like. The processor and memory may be supplemented by or included by special purpose logic circuitry.

In addition, the computer readable medium may be any available medium that can be accessed by a computer, and may include both computer storage media and transmission media.

Although the specification includes numerous specific implementation details, these should not be construed as limiting to any invention or the scope of the claims, but rather as a description of features that may be specific to a particular embodiment of a particular invention. It must be understood. Certain features that are described in this specification in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable subcombination. Furthermore, while the features may operate in a particular combination and may be initially depicted as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, the claimed combination being a subcombination Or a combination of subcombinations.

Likewise, although the operations are depicted in the drawings in a specific order, it should not be understood that such operations must be performed in the specific order or sequential order shown in order to obtain desirable results or that all illustrated operations must be performed. In certain cases, multitasking and parallel processing may be advantageous. Moreover, the separation of the various device components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and devices will generally be integrated together into a single software product or packaged into multiple software products. It should be understood that it can.

On the other hand, the embodiments of the present invention disclosed in the specification and drawings are merely presented specific examples for clarity and are not intended to limit the scope of the present invention. It is apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

10: user interface unit 20: gingiva plane generating unit
30: dental arch generator 40: image registration unit
50: panorama image generating unit 60: simulation provider
70: guide design

Claims (11)

In the dental surgical guide design method of digitally designing the dental surgical guide on a computer,
Obtaining a CT image and an oral scan image of the patient;
Defining at least one dot on the oral scan image;
Generating a gingival plane in which the at least a portion of the plane abuts the gingival upper boundary based on the defined point;
Generating an arch form line on the oral cavity scan image;
Registering the oral cavity scan image and the CT image; And
Generating a panoramic image based on the gingival plane in the CT image corresponding to the gingival plane of the oral cavity scan image derived by the registration and the dental arch line in the CT image corresponding to the dental arch line of the oral scan image Dental surgical guide design method comprising the steps of.
The method of claim 1,
Defining at least one point in the oral scan image,
The dental surgical guide design method, characterized in that performed by the user through the input through the user interface unit or in accordance with the criteria provided in advance.
The method of claim 1,
Generating the gingival plane,
And wherein at least a portion of the gingiva plane is created to abut the upper boundary of the gingiva close to the missing tooth corresponding to the implant subject.
The method of claim 1,
And wherein the upper gingiva boundary where at least a portion of the gingiva plane contacts is the boundary between the free gingiva and the tooth boundary or the papillary gingiva.
The method of claim 1,
Generating a crown in an area where a tooth is missing from the oral cavity scan image or the CT image,
And wherein the crown is created to be positioned on the arch line.
The method of claim 5,
And in the step of generating the crown, the crown is generated such that the lower portion of the crown does not exceed the gingival plane above a predetermined reference.
The method of claim 1,
Providing an implant placement simulation for determining the position, size, and angle of an implant object based on at least one of the oral cavity scan image, the panoramic image, and the CT image; And
And further designing a surgical guide based on a result of the implant placement simulation.
The method of claim 7, wherein
Designing the surgical guide,
And determining the thickness of the support of the surgical guide to cover the gingiva of the patient based on the location of the gingival plane.
A computer-executable recording medium having recorded thereon a program for executing the method for designing a dental surgical guide according to any one of claims 1 to 8.
A dental surgical guide design device for performing computer assisted design of a dental surgical guide,
A gingiva plane generating unit configured to generate a gingival plane in which at least a portion of the plane contacts the upper boundary of the gingiva in the oral scan image based on at least one or more points defined in the oral scan image of the patient;
An arch arch generating unit generating an arch arch line on the oral cavity scan image;
An image registration unit matching the oral scan image and the CT image of the patient; And
Based on the gingival plane in the CT image corresponding to the gingival plane of the oral cavity scan image derived by registration through the image registration unit and the arch line in the CT image corresponding to the dental arch line of the oral scan image And a panoramic image generation unit for generating a panoramic image.
The method of claim 10,
A simulation provider for providing an implant placement simulation for determining the position, size, and angle of an implant object; And
And a guide design unit for designing a surgical guide based on a result of the implant placement simulation by the simulation providing unit.

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