KR20110074209A - Method of making a oral cavity model - Google Patents

Method of making a oral cavity model Download PDF

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Publication number
KR20110074209A
KR20110074209A KR1020090131115A KR20090131115A KR20110074209A KR 20110074209 A KR20110074209 A KR 20110074209A KR 1020090131115 A KR1020090131115 A KR 1020090131115A KR 20090131115 A KR20090131115 A KR 20090131115A KR 20110074209 A KR20110074209 A KR 20110074209A
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KR
South Korea
Prior art keywords
image data
information
model
oral
oral cavity
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KR1020090131115A
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Korean (ko)
Inventor
권오형
Original Assignee
주식회사 사이버메드
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Priority to KR1020090131115A priority Critical patent/KR20110074209A/en
Priority to PCT/KR2010/009312 priority patent/WO2011078617A2/en
Publication of KR20110074209A publication Critical patent/KR20110074209A/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17—Guides or aligning means for drills, mills, pins or wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/082—Positioning or guiding, e.g. of drills
    • A61C1/084—Positioning or guiding, e.g. of drills of implanting tools
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/34—Making or working of models, e.g. preliminary castings, trial dentures; Dowel pins [4]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0089—Implanting tools or instruments
    • A61C8/009—Implanting tools or instruments for selecting the right implanting element, e.g. templates

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Dental Prosthetics (AREA)

Abstract

The present disclosure includes a first step of generating first image data containing information about the oral cavity surface and second image data containing information about the interior of the oral cavity surface; And a second step of forming an oral model in which information about the inside of the oral cavity surface of the second image data is combined based on the first image data.

Description

METHOD OF MAKING A ORAL CAVITY MODEL

The present disclosure relates to a method for forming an oral model as a whole, and more particularly, to a method for forming an oral model using two images to make one oral model.

This section provides background information related to the present disclosure which is not necessarily prior art.

1 is a view showing an example of drilling for implant placement described in US Patent No. 5,320,529, the surgical guide 100 is located on the bone 110, with a guide hole 120, the bone 110 When the hole 140 is formed through the drill 130, the drill 130 is guided. Reference numeral 150 is a nerve within the bone 110. Care should be taken not to damage the nerves 150 within the bone 110 when planning the hole 140 to be formed in the bone 110 and / or when manufacturing the surgical guide 100. Reference numeral 160 is a sleeve inserted into the guide hole 120.

FIG. 2 is a view illustrating an example of implant planning, and shows a screen in which four implant fixture models 170A, 170B, 170C, and 170D are placed on a CT image.

3 is a view for explaining an example of a method for manufacturing a surgical guide from the implant planing described in International Publication No. WO95 / 28688, first, a medical imaging apparatus such as CT equipment or MRI equipment from the bone 110 Using the, the bone image 111 is acquired. The bone image 112 is an enlarged image of the bone image 111. Next, a functional element 121, such as a guide hole 120 (see FIG. 1), formed through the segmentation to form a guide image 101 along the cross-sectional shape of the bone image 112, and planed thereon; Functional Element). In this way, the information about the guide image 101 on which the functional element 121 is formed is transferred to a rapid prototyping (RP) device to manufacture a surgical guide 100 having a guide hole 120. However, in the case of this method, although the shape of bone and teeth is clearly known due to the characteristics of the CT image, it is difficult to reproduce the shape of the gum which is a soft tissue. In addition, since it is not easy to design a prosthesis requiring precision using only a CT image, in most cases, the prosthesis is designed after reproducing the oral cavity using a plaster model or a 3D scanner.

4 is a view for explaining another example of a method for manufacturing a surgical guide, unlike the method of Figure 3, the radiographic guide 200, which can be referred to as a preform (preform) of the surgical guide 100 implants Used for planning. The radiographic guide 200 is an object made of resin having a mouthpiece shape that fits snugly in the mouth of the patient, and the surgical guide 100 has a radio in which a guide hole 120 is formed, which is a functional element planned through implant planning. It may be understood as the graphic guide 200. This image or image data is prepared by radiographic guide 200 in accordance with the shape of the patient's mouth prior to the CT scan, after wearing the radiographic guide 200 and CT scan of the patient's mouth, while the radiographic guide ( Only 200) can be obtained by CT imaging. Since the radiographic guide 200 determines the final shape of the surgical guide 100, it is designed in consideration of the position and the like where the implant is to be treated. However, when an inexperienced user designs the radiographic guide 200, if the radiographic guide 200 is incorrectly designed, there is a problem that the surgical guide 100 does not finally fit the patient's teeth. May occur.

FIG. 5 is a view illustrating an example of a method of manufacturing a prosthesis in the related art. When a implant fixture is implanted in a hole 140 shown in FIG. 1 and a period of time passes, a healing abutment 34 is removed. To expose the implant fixture 10 and insert an impression coping 35 therein. Next, the impression body 41 is obtained through the impression taking, and the implant analog 11 having the same shape as the implant fixture 10 is positioned through the impression coping 35. Next, the model 50 is made of plaster. In the model 50, the implant analog 11 corresponding to the actual implant fixture 10 is fixed. When the impression coping 35 is removed, the model 50 can be used to design the abutment or the prosthesis. have. Therefore, from the design of the prosthesis to the manufacture and implantation of the prosthesis, the implant planning using CT image, the dring reel using surgical guide, the placement of implant fixture, the making of gypsum model, the prosthesis using gypsum model with implant analog placed It can be seen that a lot of time is required to design.

6 is a view showing another example of a method for designing and manufacturing a prosthesis in the related art, in order to shorten the time required to design the prosthesis, after preparing the surgical guide 100, the surgical guide 100 How to design the prosthesis using the model (50) after mounting the implant analog (11), stacking the dam (12), making gums with rubber (13), squeezing plaster patterns to make the model (50). Is presented. The model 50 manufactured as described above may be implemented on the model 50 'without drilling the hole 140' corresponding to the hole 140 actually formed in the oral cavity on the patient. Thus, according to this method, after the implant planning and fabrication of the surgical guide, it is possible to design and manufacture the prosthesis before entering the drilling, the advantage that the prosthesis can be made immediately when the patient goes to the dentist for drilling There is this. This method can be said to design the prosthesis using information about the oral cavity before drilling and implant planning information. On the other hand, the method illustrated in FIG. 5 may be referred to as designing a prosthesis using information about the oral cavity after drilling through implant planning.

This will be described later in the Specification for Implementation of the Invention.

SUMMARY OF THE INVENTION Herein, a general summary of the present disclosure is provided, which should not be construed as limiting the scope of the present disclosure. of its features).

According to one aspect of the present disclosure (According to one aspect of the present disclosure), the first image data containing information about the oral cavity surface and the second image data containing information about the interior of the oral cavity surface are generated. Stage 1; And a second step of forming an oral model in which information about the inside of the oral cavity surface of the second image data is combined based on the first image data.

This will be described later in the Specification for Implementation of the Invention.

The present disclosure will now be described in detail with reference to the accompanying drawing (s).

FIG. 7 is a view illustrating an example of an implant, in which an implant is coupled to an implant fixture 10, a prosthesis 20, and an implant fixture 10 fixed to a bone to support the prosthesis 20. FIG. Abutment (30) is included. The abutment 30 is fixed to the implant fixture 10 by a screw 32 in a state in which the connecting portion 31 is inserted into the implant fixture 10.

8 and 9 illustrate an example of a method of designing a prosthesis according to the present disclosure, which first includes CT image data or CT image 70 containing information about the interior of the oral cavity surface, and an implant fixture 10; 5 and 7) generate image data or image 60 containing information about the oral cavity surface in the absence. The image 60 may be obtained by obtaining an impression through the impression taking of the oral cavity, then forming a model through a gypsum bone, CT scan or three-dimensional scan. It can also be obtained by scanning the oral cavity directly using a three-dimensional scanner.

Next, the implant planning information is determined through implant planning in the CT image 70 (see the left figure in FIGS. 2 and 9). In this process, an implant fixture model 170A or the like corresponding to the implant fixture 10 (see FIG. 7) is selected, positioned, and the width and depth of the hole for placement of the implant fixture 10 are determined.

Next, the determined implant planning information is added to the image 60. The design of the prosthesis 20 may be done on a computer (see the middle figure in FIG. 9) or by forming a model 50 having an aperture 140 ′ using RP equipment from an image 60 to which implant planning information has been added. (See figure at right in FIG. 9). In this case, it is preferable to associate the two images 60 and 70 in order to accurately position the implant planning information determined for the CT image 70 with respect to the image 60. The design process is a process of inserting an implant analog into the hole 140 ', and then manufacturing the abutment and / or prosthesis in accordance with the oral cavity and the implant analog.

FIG. 10 is a view for explaining an example of a method of associating two images, in which a CT image 70 and an image 60 are shown to the left and right, and the regions A and B of the CT image 70 and the image ( By surface based registration of the corresponding regions A ', B' of 60, the two images 60, 70 can be associated. Registration is a process of associating two images or volume data with each other, and can be understood as a process of finding a transformation matrix for associating two images having respective coordinate systems. Such registration is a process well known to those skilled in the art. In addition to using surface registration, it is also possible to use Point Based Registration. For example, a point registration is possible when a CT image is taken while a vacuum form in which a marker is inserted is provided in a plaster model and a patient, respectively. In FIG. 10, CT image 70 is an image taken by specifying the intensity of bone in CT image data or CT image 70, and both images 60, 70 have both teeth for convenience of registration description. The mouth of the patient was used.

As shown in Figure 1, in the case of using the surgical guide 100 in the formation of the hole 140, using the two images (60, 70) according to the present disclosure to design and manufacture the surgical guide as follows can do.

11 and 12 illustrate an example of a method of designing a surgical guide according to the present disclosure, which first extracts a surface 61 from an image 60. Surface 61 corresponds to the surface where conventional radiographic guide 200 (see FIG. 4) contacts the teeth and / or gums in the oral cavity.

Next, the surgical guide model 62 is formed by giving a volume based on the surface 61. Surgical guide model 62 corresponds to conventional radiographic guide 200.

Next, using the CT image 70 and the surgical guide model 62, based on the determined implant planning information, a functional element such as a guide hole 120 (see FIG. 1) for drilling the hole 140 is used. By designing and implanting in the surgical guide model 62, the design of the surgical guide model 62 with the functional element 63 is completed. Reference numeral 64 is a guide hole of a screw or pin used to secure the surgical guide produced through the RP to the oral cavity.

13 is a diagram illustrating an example of a method of forming an oral model according to the present disclosure. According to the present disclosure, it is possible to form an oral model including information on the surface of the oral cavity prior to surgery, or to manufacture an actual model therefrom. Hereinafter, a method of forming an oral model including the lower part of the tooth, that is, the root, will be described as an example.

In the case of the image 60, only the information on the oral cavity surface is represented, and information on the oral cavity surface is not represented. On the other hand, in the case of the CT image 70, although it does not accurately reflect the information on the soft tissue, it can also represent information about the bone inside the oral surface. Therefore, the information about the tooth part 91 covered by the gum from the CT image 70 is obtained, and the information about the tooth part 92 exposed to the outside of the gum from the image 60 is obtained so that the teeth 93 having combined them are obtained. When formed and represented with the image 60, an oral model 94 representing both the oral cavity surface and the interior of the oral cavity surface can be obtained. Furthermore, using the proper volume rendering technique for the oral model 94, the teeth 93 can be expressed in a color different from other parts, and the RP equipment can be used to make the teeth 93 different from the gums. do.

14 is a view illustrating an example of a method of joining teeth according to the present disclosure, and forms a boundary line 96 that distinguishes the tooth portion 92 from the gum 95 on the image 60. The relationship between two images 60,70 with different coordinate systems ([a, b, c], [d, e, f]) is known as a linear transformation (T) through registration, so the boundary line on the image 60 If 96 is formed, the boundary line 96 can be applied also to the tooth part 91. Therefore, through the necessary volume rendering, it is possible to represent the tooth 93 as a volume, it is possible to express it with the image 60 or CT image 70, combined to reproduce through the RP equipment It becomes possible.

FIG. 15 is a view showing another example of a method for forming an oral model according to the present disclosure. In addition to the teeth 93 and the gums 95, the bones 110 are orally modeled together, and the actual manufactured model is Is shown. In the actual manufactured model, the teeth 93 and the bones 110 may be integrated or separated. Through such a model, the actual reproduction of the gum 95, the reproduction of the teeth 93, and the accurate reproduction of the maxillary / mandibular bone 110 can be made and visualized. This oral model can be obtained by taking the bone 110 and the tooth portion 91 by taking the intensity value corresponding to the bone and adding the tooth portion 92 to it. It may also be obtained by taking the bone 110 separately and adding the teeth 93. The information of the gum 95 may be obtained by removing the volume corresponding to the bone 110 obtained from the CT image data or the image 70 from the image data or the image 60. In addition, using the oral cavity model according to the present disclosure, in the production of the actual model, only the region where the gum 95 is located or the region where the tooth 93 is located, without the need to manufacture the entire bone 110 by the RP equipment You will be able to produce a real model.

Various embodiments of the present disclosure will be described below.

(1) The information on the oral surface contains information on the part of the tooth exposed to the outside of the gum, the information on the inside of the oral surface contains information on the area of the tooth covered by the gum, and the oral model is exposed to the outside of the gum. A method of forming an oral model, characterized in that it contains information in which the combined tooth portion and the tooth portion covered by the gums are combined.

(2) A method of forming an oral model, characterized in that the second step comprises the step of distinguishing the gum and teeth on the first image data.

And (3) the second step comprises associating the first image data with the second image data.

(4) A method for forming an oral model, characterized in that the first image data is obtained from a model containing information about the oral cavity surface.

(5) A method for forming an oral model, wherein the first image data is obtained by scanning the oral cavity surface.

(6) A method for forming an oral model, wherein second image data is obtained by CT imaging.

(7) A method of forming an oral model, wherein the first image data is obtained from a model containing information on the oral cavity surface, and the second image data is obtained by CT imaging.

(8) A method of forming an oral model, characterized in that the second step obtains information about the gum from the first image data, obtains information about the bone from the second image data, and then forms an oral model.

(9) A method for forming an oral model, characterized in that the oral model contains information about the teeth obtained from the first image data.

(10) A method of forming an oral model, characterized in that the second step includes associating the first image data with the second image data.

(11) A method for forming an oral model, wherein the second step obtains information about the gum from the first image data based on the information on the bone obtained from the second image data. The first image data is a lump having surface information of the gums. When the volume of the bone obtained from the second image data is removed from the first image data, not only the surface information of the gum but also information about the boundary with the bone can be obtained.

(12) a third step of specifying only the region of interest; Through this configuration, it is possible to specify and data only the gum, teeth and / or bone regions of interest, and to reduce the cost by producing a real model.

(13) The oral model forms an oral model, characterized in that the information on the inside of the oral surface of the second image data is formed by combining the information on the tooth portion exposed to the outside of the gum obtained based on the first image data. Way. Through this configuration, it is possible to create an oral model having only bones and teeth except for gums.

According to the method of forming one oral model according to the present disclosure, it is possible to create one oral model using two images.

According to another method of forming an oral model according to the present disclosure, it is possible to create an oral model representing information on the oral cavity surface and the surface thereof.

According to another method of forming an oral model according to the present disclosure, since only the ROI may be manufactured, the manufacturing cost may be reduced.

1 is a view showing an example of drilling for implant placement described in US Patent No. 5,320,529,

2 is a view for explaining an example of implant planning,

3 is a view for explaining an example of a method for manufacturing a surgical guide from the implant planing described in International Publication No. WO95 / 28688,

4 is a view for explaining another example of a method for manufacturing a surgical guide,

5 is a view showing an example of a method for manufacturing a prosthesis in the related art;

6 is a view showing another example of a conventional method for designing and manufacturing a prosthesis,

7 is a view showing an example of an implant,

8 and 9 illustrate an example of a method of designing a prosthesis according to the present disclosure;

10 is a diagram for explaining an example of a method of associating two images;

11 and 12 are views illustrating an example of a method for designing a surgical guide according to the present disclosure,

13 illustrates an example of a method of forming an oral model according to the present disclosure;

14 is a view illustrating an example of a method of joining teeth according to the present disclosure;

15 illustrates another example of a method of forming an oral model in accordance with the present disclosure.

Claims (17)

A first step of generating first image data containing information about the oral cavity surface and second image data containing information about the interior of the oral cavity surface; And, And a second step of forming an oral model in which information on the inside of the oral cavity surface of the second image data is combined based on the first image data. The method according to claim 1, Information about the surface of the oral cavity contains information about the area of the tooth exposed outside the gums. Information about the surface of the oral cavity contains information about the area of the tooth covered by the gums, The oral model is a method for forming an oral model, characterized in that it contains the combined information of the tooth portion exposed to the outside of the gum and the tooth portion covered by the gum. The method according to claim 2, The second step includes the step of distinguishing the gum and the teeth on the first image data. The method according to claim 1, The second step includes associating the first image data with the second image data. The method according to claim 1, The first image data is obtained from a model containing information about the oral cavity surface. The method according to claim 1, The first image data is obtained by scanning the oral cavity surface. The method according to claim 1, And the second image data is obtained by CT imaging. The method according to claim 4, The first image data is obtained from a model containing information about the oral cavity surface, The second image data is obtained by CT imaging. The method according to claim 8, The second step includes the step of distinguishing the gum and the teeth on the first image data. The method according to claim 4, The first image data is obtained by scanning the oral cavity surface, And the second image data is obtained by CT imaging. The method according to claim 10, The second step includes the step of distinguishing the gum and the teeth on the first image data. The method according to claim 1, The second step comprises obtaining information about the gum from the first image data, obtaining information about the bone from the second image data, and then forming an oral model. The method according to claim 12, And the oral model contains information about teeth obtained from the first image data. 14. The method of claim 13, The second step includes associating the first image data with the second image data. 14. The method of claim 13, The second step is a method for forming an oral model, characterized in that to obtain information about the gum from the first image data based on the information on the bone obtained from the second image data. The method according to claim 1, And a third step of specifying only the region of interest. The method according to claim 1, The oral model is a method of forming an oral model, characterized in that the information on the inside of the oral surface of the second image data is formed by combining the information on the tooth portion exposed to the outside of the gum obtained based on the first image data.
KR1020090131115A 2009-12-24 2009-12-24 Method of making a oral cavity model KR20110074209A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020090131115A KR20110074209A (en) 2009-12-24 2009-12-24 Method of making a oral cavity model
PCT/KR2010/009312 WO2011078617A2 (en) 2009-12-24 2010-12-24 Method for designing dental models

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090131115A KR20110074209A (en) 2009-12-24 2009-12-24 Method of making a oral cavity model

Related Child Applications (1)

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KR1020120071085A Division KR20120081578A (en) 2012-06-29 2012-06-29 Method of making a oral cavity model

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KR1020090131115A KR20110074209A (en) 2009-12-24 2009-12-24 Method of making a oral cavity model

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