WO2022234898A1

WO2022234898A1 - Image data processing method for designing dental restoration

Info

Publication number: WO2022234898A1
Application number: PCT/KR2021/012540
Authority: WO
Inventors: 김진철; 김진백
Original assignee: 주식회사 디오
Priority date: 2021-05-04
Filing date: 2021-09-15
Publication date: 2022-11-10
Also published as: KR102560140B1; KR20220151057A

Abstract

The present invention provides an image data processing method for designing a dental restoration to improve dental restoring precision, the method comprising: a first step of coupling a temporary cylinder having a temporary coupling part formed thereon to the upper end part of an implant, disposing a temporary dental prosthesis on a maxillary arch to be restored, and correcting a position of the temporary coupling part; a second step of obtaining a first scanning image, a second scanning image, and a third scanning image, and loading the first scanning image, the second scanning image, and the third scanning image into a planning part; a third step of obtaining a corrected scanning image in which three-dimensional surface information of the temporary coupling part and three-dimensional surface information of the maxillary arch to be restored are integrated, and generating an integrated image; and a fourth step of configuring design information of an inner portion on the basis of the three-dimensional surface information of the maxillary arch to be restored and finally generating design information of a digital dental prosthesis including a virtual coupling part configured on the basis of the three-dimensional surface information of the temporary coupling part.

Description

Image data processing method for dental restoration design

The present invention relates to an image data processing method for designing a dental restoration, and more particularly, to an image data processing method for designing a dental restoration with improved dental restoration precision.

In general, a dental restoration refers to an artificial periodontal tissue in the oral cavity that artificially restores the appearance and function to replace a missing tooth. Such dental restorations may be classified into dentures, which are adhesively fixed to the restoration target gums through an adhesive, or dental prosthesis, which is fixed to implants placed in alveolar bone.

In detail, the prosthesis includes an artificial tooth part in which a plurality of artificial teeth replacing the lost natural teeth are arranged or connected to the teeth corresponding to the arch shape of the restoration target gum. In addition, the prosthetic may further include an artificial gum unit that surrounds and connects the lower end of the artificial tooth unit. In this case, a plurality of implants may be spaced apart from each other along the arch, and a coupling portion may be formed in the prosthesis to correspond to the placement position of the implant.

Here, the coupling part may be formed in the form of a buried hole in which the support cylinder is buried and fixed. Alternatively, the coupling portion may be formed in the form of a coupling groove in which the post of the abutment coupled to the upper end of the implant is molded and coupled. And, the lower end of the abutment is coupled to the implant and the upper end is coupled to the coupling portion. At this time, since the coupling part is formed on the prosthesis, when the post is coupled to the coupling part, the prosthesis may be finally installed on the restoration target gum.

Meanwhile, the prosthesis may be classified into a partial prosthesis or a complete prosthesis according to the number of missing teeth. Here, the partial prosthesis is a device for restoring teeth of a patient with a partial edentulous jaw in which a part of the tooth to be restored is lost due to natural or surgical extraction. In addition, the complete prosthesis is a device for restoring teeth of a patient with an edentulous jaw in which the entire tooth on the side of the gum to be restored has been lost due to natural or surgical extraction.

Meanwhile, in the conventional prosthesis, design information may be obtained based on a scanning image obtained by scanning the oral cavity and the temporary prosthesis. In this case, the temporary prosthesis is manufactured so that the patient can use it temporarily during the manufacturing period of the prosthesis. That is, accurate design information of the prosthesis may be obtained based on the scanning image of the provisional prosthesis temporarily manufactured to be actually usable instead of the prosthesis.

In detail, when the implant is placed on the restoration target gum and the abutment is coupled to the upper side of the implant, the post of the abutment protrudes toward the opposing arch. At this time, the temporary cylinder is coupled to the post of the abutment.

Here, the temporary prosthesis is temporarily installed on the restoration target gum. At this time, the temporary prosthesis is formed with a temporary buried hole in which the temporary cylinder is buried and fixed. Accordingly, when the temporary cylinder is inserted into the temporary buried hole and a curable resin is filled and cured between the temporary buried hole and the temporary cylinder, the temporary cylinder may be fixed to the temporary prosthesis.

Here, the temporary buried hole is formed to have an outer diameter of the temporary cylinder and an inner diameter having a predetermined tolerance. Therefore, when the temporary prosthesis is temporarily installed in the oral cavity or an impression model manufactured for the oral cavity before the curable resin is cured, the position of the temporary cylinder can be accurately matched with the placement position of the implant.

At this time, the temporary prosthesis is disposed on the restoration target gum in a state in which the relining resin is applied to the inner surface. Accordingly, when the temporary prosthesis is seated on the restoration target gum and occluded with the opposing arch, the inner surface of the temporary prosthesis may be corrected to correspond to the external shape of the restoration target gum through the relining resin. Accordingly, image information on the outer surface of the restoration target gum can be obtained through a scanning image obtained by scanning the temporary prosthesis with the inner surface part corrected.

However, there is a problem in that the relining resin is introduced into the temporary coupling groove formed in the temporary cylinder while the relining resin is applied to the temporary prosthesis. For this reason, there is a problem in that a gap is generated as much as the thickness to which the relining resin is adhered, and as the fixed position of the temporary cylinder is moved by the gap, the positioning accuracy is deteriorated.

In addition, the scanning image of the temporary prosthesis is obtained in a state in which the relining resin is attached to any one of the outer surface of the post and the inner surface of the temporary coupling groove. Due to this, the accuracy of the scanning image is deteriorated, and there is a problem in that the design precision of the prosthesis set based on the scanning image is significantly reduced.

Moreover, there is a problem in that the surface is contaminated or scratches are generated in the process of removing the relining resin adhered to the outer surface of the post and the inner surface of the temporary coupling groove. For this reason, the cost of separating and replacing the contaminated abutment is increased, and there is a problem in hygiene such as inflammation in the treatment site in the process of using the contaminated or scratched temporary prosthesis as it is.

In order to solve the above problems, an object of the present invention is to provide an image data processing method for designing a dental restoration with improved dental restoration precision.

In order to solve the above problems, the present invention is a temporary cylinder having a temporary coupling part formed therein is coupled to the upper end of the implant placed in the restoration target arch, and a temporary buried hole formed at each position corresponding to the placement position of the implant in the temporary prosthesis. a first step of arranging the temporary prosthesis in the restoration target arch so that the temporary cylinder is inserted into the body, and correcting the position of the temporary coupling part fixed to the temporary prosthesis to correspond to the placement position; A first scanning image of the corrected temporary prosthesis, a second scanning image of the restoration target arch to which the implant is fixed, and a third scanning image of the opposing arch are acquired through an imaging device and loaded into a planning unit. Step 2; A corrected scanning image is obtained in which the three-dimensional surface information of the temporary coupling unit extracted from the first scanning image and the three-dimensional surface information of the restoration target arch extracted from the second scanning image are integrated, the corrected scanning image and the a third step of generating an integrated image by matching the third scanning image to correspond to a preset vertical height; and the design information of the inner surface is set to match the outer surface of the restoration target arch based on the three-dimensional surface information of the restoration target arch included in the corrected scanning image, and is set based on the three-dimensional surface information of the temporary coupling part It provides an image data processing method for designing a dental restoration including a fourth step of finally generating design information of a digital prosthesis as the virtual coupling part is included in the design information of the inner surface part.

Through the above solutions, the present invention provides the following effects.

First, accurate design information can be obtained in a simple way by matching common parts to the scanning images of the restoration target arch and the temporary prosthesis, then extracting and matching only the images required for design. Accordingly, the cumbersome process of separate relining of applying a resin to the gap generated between the restoration target arch and the temporary prosthesis by protruding from the lower end of the temporary cylinder to the lower part of the temporary prosthesis can be omitted.

Second, since relining is omitted, the problem of resin flowing into the temporary coupling part formed as a groove is fundamentally eliminated, so that the accuracy of the 3D surface information of the temporary coupling part included in the scanning image can be improved. In addition, as the internal image of the temporary prosthesis is replaced with the 3D surface information of the restoration target arch, the gap between the finally manufactured digital prosthesis and the gum is minimized, so that aesthetics can be improved.

Third, the design information of the coupling part formed in the digital prosthesis based on the scanning image of the temporary prosthesis in which the position of the temporary coupling part is precisely corrected through the occlusal pressure applied before the curable resin is hardened when the temporary cylinder is embedded and fixed in the temporary prosthesis. Since it is acquired precisely, the intraoral installation precision of the final digital prosthesis can be significantly improved.

1 is a flowchart of an image data processing method for designing a dental restoration according to an embodiment of the present invention.

2 is a cross-sectional view of a temporary prosthesis applied to the image data processing method for designing a dental restoration according to an embodiment of the present invention.

3 is an exemplary view showing a plurality of scanning images in the image data processing method for designing a dental restoration according to an embodiment of the present invention.

Figure 4 is an exemplary view showing an integrated image in the image data processing method for designing a dental restoration according to an embodiment of the present invention.

5 is a cross-sectional view showing a process of acquiring a corrected scanning image in the image data processing method for designing a dental restoration according to an embodiment of the present invention.

6 is an exemplary view showing a process of acquiring a corrected scanning image in the image data processing method for designing a dental restoration according to an embodiment of the present invention.

7 is an exemplary view illustrating a matching process of a virtual coupling unit in an image data processing method for designing a dental restoration according to an embodiment of the present invention.

Figure 8 is an exemplary view showing the registration process of the scanning image in the image data processing method for designing a dental restoration according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The best embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

Hereinafter, an image data processing method for designing a dental restoration according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In this case, the dental restoration to be described later is manufactured to replace at least one missing tooth, and in the present invention, it is preferable to understand that it is a prosthesis fixed through an implant placed in the oral cavity. And, it is preferable to understand that the implant is a fixture that is placed in the alveolar bone so that the dental restoration is fixed to the oral cavity. That is, it is preferable to understand that the implant and the fixture have the same meaning hereinafter.

In the following, it is preferable that the restoration target arch is an arch that requires dental restoration treatment through the dental restoration, and the opposing arch is an arch that occludes the restoration target arch. At this time, in the present invention, it is described and illustrated that the restoration target arch is an edentulous maxilla and the opposing maxilla is an edentulous mandible. Of course, the present invention can also be applied to the design of a prosthesis for the restoration of teeth in patients whose mandibles are edentulous or both upper and lower jaws are edentulous.

In addition, the digital prosthesis to be described later is preferably understood as an artificial periodontal tissue manufactured for use while being substantially fixed in the oral cavity. In addition, it is preferable to understand that the temporary prosthesis described later is a prosthesis that is primarily manufactured in order to obtain precise design information when designing the digital prosthesis. Moreover, the temporary prosthesis can be utilized not only to provide design information for manufacturing the digital prosthesis, but also to be temporarily used by a patient during the manufacturing period of the digital prosthesis. Accordingly, the utility and convenience of the temporary prosthesis in the dental restoration process can be significantly improved.

1, the image data processing method for designing a dental restoration according to the present invention includes the steps of coupling a temporary cylinder to the implant and fixing the temporary cylinder to the temporary prosthesis (s10), a plurality of scanning images are obtained, A series of steps such as a step (s20) of loading the plurality of obtained scanned images into a planning unit (s20), a step of acquiring a corrected scanned image, and a step of generating an integrated image (s30), and a step (s40) of finally generating the design information of the digital prosthesis includes the process of

Referring to FIG. 2 , the temporary cylinder 10 is coupled to the upper end of the implant 1 placed in the restoration target arch 2 . In detail, it is preferable that the upper end of the implant 1 is inserted into the temporary cylinder 10 and the temporary coupling part 11 coupled through the screw s is formed. At this time, the temporary cylinder 10 has a through hole formed along the longitudinal direction, and the temporary coupling part 11 communicates with the lower end of the through hole. Then, a ring-shaped engaging step 12 is formed between the through hole and the temporary coupling part 11 , and the head portion of the screw s is caught by the engaging step 12 . Accordingly, the temporary cylinder 10 may be coupled to the upper end of the abutment 5 . Here, it is preferable to understand that the upper end of the implant 1 is a post 5a that is a structure of the upper end of the abutment 5 that is substantially coupled to the upper end of the implant 1 .

In addition, a temporary buried hole 21 into which the temporary cylinder 10 is inserted and fixed is formed in the temporary prosthesis 20 . In detail, the temporary prosthesis 20 is preferably formed of a resin material capable of 3D printing. For example, the temporary prosthesis 20 may be manufactured by three-dimensionally printing a base resin including an acrylic oligomer that is cured by exposure to curing light such as ultraviolet rays in response to predetermined design information of the temporary prosthesis.

Here, the temporary buried hole 21 is formed in the temporary prosthesis 20 and is preferably formed at each position corresponding to the placement position of the implant 1 . In this case, it is preferable that the temporary buried hole 21 has an inner diameter exceeding the outer diameter of the insertion part side of the temporary cylinder 10 . In addition, the temporary buried hole 21 is a clearance interval in consideration of the error between the implant 1 and the abutment 5 are actually placed and combined in the oral cavity and the implantation information established in the tooth restoration planning step. It is preferably formed including.

Meanwhile, the temporary prosthesis 20 is disposed in the restoration target arch 2 so that the temporary cylinder 10 is inserted into the temporary buried hole 21 . A curable resin r is filled between the outer surface of the temporary cylinder 10 and the inner surface of the temporary buried hole 21 . At this time, when the upper and lower jaws are occluded before the curable resin r is cured, the position of the temporary prosthesis 20 is moved to actually match the opposing arch through the occlusal pressure of the upper and lower jaws. And, when the curable resin r is cured, the position of the temporary cylinder 10 in the temporary buried hole 21 may be fixed. Through this series of processes, the position of the temporary coupling portion 11 fixed to the temporary prosthesis 20 may be corrected to match the actual placement position of the implant 1 .

In this case, the curable resin r preferably includes a resin material used in manufacturing the temporary prosthesis 20 . Accordingly, the curable resin r can be firmly attached and cured in the temporary buried hole 21 through a high degree of fusion between the temporary prosthesis 20 and the same type material of the curable resin r. In addition, it is preferable that ring-shaped uneven portions are formed in multiple stages along the longitudinal direction on the outer surface of the temporary cylinder 10 on the side of the insertion portion. Through this, it is possible to prevent in advance that the temporary cylinder 10 is separated from the lower side after being fixed in the temporary buried hole 21 .

Here, a support step 13 exceeding the inner diameter of the temporary buried hole 21 may be formed at the lower end of the temporary cylinder 10 . That is, as the support step 13 is caught on the edge of the temporary buried hole 21 , the insertion depth of the temporary cylinder 10 in the temporary buried hole 21 may be limited. At this time, the temporary cylinder 10 protrudes toward the inner surface 20b of the temporary prosthesis 20 by the upper and lower thickness of the support step 13 , and the temporary prosthesis 20 by the thickness of the support step 13 . The inner surface 20b and the outer surface 2a of the restoration target arch 2 are spaced apart from each other. On the other hand, the inner surface 20b of the provisional prosthesis 20 is a portion facing the restoration target arch 2, and the outer surface 20a of the provisional prosthesis 20 is the coronal side of the provisional tooth that occludes the opposite arch. It is preferable to understand

Referring to FIG. 3 , a plurality of scanning images are acquired using an imaging device such as an oral scanner or a fixed scanner, and the acquired scanning images are loaded into the planning unit. In this case, the scanning images preferably include a first scanning image m1 , a second scanning image m2 , and a third scanning image m3 .

In detail, the first scanning image m1 includes temporary prosthetic three-dimensional surface information m20 obtained by scanning the entire inner and outer surfaces of the temporary prosthesis 20 for which the position of the temporary coupling part 11 is corrected. This is preferable. Here, the three-dimensional surface information m20 of the temporary prosthesis preferably includes three-dimensional surface information on the inner surface of the temporary prosthesis and three-dimensional surface information on the outer surface of the temporary prosthesis. In this case, it is preferable that the three-dimensional surface information of the inner surface of the temporary prosthesis includes information on the three-dimensional surface of the temporary coupling part m21 in which the temporary coupling part 11 is recessed in a groove shape.

In addition, the second scanning image m2 is preferably obtained by scanning the entire restoration target arch 2 to which the implant 1 is fixed. In detail, the second scanning image m2 is preferably obtained by moving the imaging device along the dental arch of the restoration target maxillary arch 2, in which the gum portion, which is a soft tissue, is exposed due to tooth loss or extraction. At this time, the entire outer surface of the labial, buccal and lingual sides of the restoration target arch 2 may be scanned using the imaging device, and the three-dimensional surface information (m2a) of the restoration target arch may be obtained as the second scanning image. (m2) can be included. Here, in the three-dimensional surface information m2a of the restoration target arch, the post three-dimensional surface information m5a, which is an image of the upper end of the implant 1, that is, the upper end of the abutment coupled to the implant 1 is preferably included.

In addition, it is preferable that the third scanning image m3 is obtained by scanning the entire arch. Accordingly, the third scanning image m3 may include 3D surface information m3b of the antagonist, which is an image of the remaining antagonist.

The scanned images thus obtained are transmitted from the imaging device to the planning unit through wired/wireless communication. Here, it is preferable to understand that the planning unit is a computer simulation device that establishes a dental restoration plan using the scanning images and 3D external information for designing a dental restoration and generates design information of the digital prosthesis, which is the final dental restoration. . That is, the three-dimensional appearance information of various parts selected and extracted from the scanning images acquired using the imaging device and a digital library to be described later is loaded into the planning unit, and a tooth restoration plan can be established using this.

4 is an exemplary view showing an integrated image in the image data processing method for designing a dental restoration according to an embodiment of the present invention.

3 to 4 , it is preferable that the three-dimensional surface information m21 of the temporary coupling part is selectively extracted from the first scanning image m1. In addition, it is preferable that the three-dimensional surface information m2a of the restoration target arch is selectively extracted from the second scanning image m2. In addition, it is preferable that a corrected scanning image m5 in which the three-dimensional surface information m21 of the temporary coupling part and the three-dimensional surface information m2a of the restoration target arch is integrated is obtained.

That is, the three-dimensional surface information m21 of the temporary coupling part that can guide the exact position of the virtual coupling part to be described later is extracted from the scanning image of the temporary prosthesis 20 that is temporarily usable during the manufacturing period of the digital prosthesis. can

Then, the three-dimensional surface information m2a of the restoration target arch may be extracted from the second scanning image m2 so that the finally manufactured inner surface of the digital prosthesis is in contact with or in close contact with the restoration target arch 2 can That is, the three-dimensional surface information m2a of the restoration target arch obtained with respect to the actual oral cavity may be utilized as the design information m50 of the digital prosthesis. At this time, the three-dimensional surface information m2a of the restoration target arch is the inner surface 20b of the temporary prosthesis 20 spaced apart from the outer surface 2a of the restoration target arch 2 by the thickness of the support step 13. It can be substituted for the scanning image for

Meanwhile, it is preferable that an integrated image M in which the corrected scanning image m5 and the third scanning image m3 are matched to correspond to a preset vertical diameter VD is generated. Through this, the three-dimensional surface information m21 of the temporary coupling unit may be virtually disposed by replacing the post-three-dimensional surface information m5a included in the three-dimensional surface information m2a of the restoration target arch. In addition, the digital prosthesis design information m50 may be generated in a virtual space spaced apart such that the corrected scanned image m5 and the third scanned image m3 correspond to the vertical height VD.

In detail, the design information (m50) of the digital prosthesis is based on the three-dimensional surface information (m2a) of the restoration target arch and the three-dimensional surface information (m3b) of the opposing tooth (m3b). have. In addition, the virtual coupling part may be set at an accurate position in the design information m50 of the digital prosthesis based on the three-dimensional surface information m21 of the temporary coupling part. Through this, the design information (m50) of the digital prosthesis can be precisely designed to fit the patient's oral cavity, and the accuracy of the digital prosthesis finally manufactured based on the design information (m50) of the digital prosthesis designed in this way can be significantly improved. can

5 is a cross-sectional view illustrating a process of acquiring a corrected scanning image in an image data processing method for designing a dental restoration according to an embodiment of the present invention, and FIG. 6 is a diagram for designing a dental restoration according to an embodiment of the present invention It is an exemplary diagram showing the acquisition process of the corrected scanning image in the image data processing method.

4 to 6 , the corrected scanned image m5 is preferably obtained through a series of processes to be described later.

First, it is preferable that a comparison area is set in each of the first scanning image m1 and the second scanning image m2. In detail, it is preferable that a plurality of first comparison areas are calculated in the three-dimensional surface information m21 of the temporary coupling part displayed in the shape of a concave groove in the first scanning image m1. In addition, it is preferable that a plurality of second comparison areas are calculated in the post three-dimensional surface information m5a displayed in a convexly protruding shape in the second scanning image m2. In this case, it is preferable that the second comparison area is calculated corresponding to a portion matching the first comparison area. Preferably, the first comparison area and the second comparison area are set as points, lines, or planes at corresponding portions of the first scanned image m1 and the second scanned image m2.

In addition, it is preferable that the first comparison area and the second comparison area are virtually matched with each other. Through this, the first scanned image m1 and the second scanned image m2 may be virtually overlapped.

Here, the internal size of the temporary coupling part 11 is formed to be slightly larger than the volume of the post 5a of the abutment. For example, a gap of about 0.1 to 0.15 mm is formed between the inner surface of the temporary coupling part 11 and the outer surface of the post 5a of the abutment. Accordingly, it is preferable that the first comparison region and the second comparison region are calculated in consideration of the gap. Furthermore, the upper edge of the engaging step 12 and the lower edge of the head of the screw (s) are formed in a conical shape. Therefore, even if a gap is formed between the temporary coupling part 11 and the post 5a of the abutment, the temporary coupling part 11 and the center of the post 5a of the abutment can be coupled to match. have.

On the other hand, the restoration target arch in which the remaining 3D surface information m20c of the temporary prosthesis displayed on the outer side of the 3D surface information m21 of the temporary coupling unit is displayed on the outer side of the post 3D surface information m5a It is preferable to be replaced with the three-dimensional surface information (m2a) of At this time, it is preferable to understand that the remaining 3D surface information m30c of the temporary prosthesis includes information on the inner and outer 3D surfaces of the temporary prosthesis excluding the 3D surface information m21 of the temporary coupling part. In addition, it is preferable to understand that the word swap means that a preset image is replaced or exchanged with an image transformed according to another image processing or image processing.

In detail, in the first scanning image m1, the 3D surface information m21 of the temporary coupling part and the remaining 3D of the temporary prosthesis with the outer e1 of the temporary coupling part 3D surface information m21 as a boundary. The surface information m20c is separated. Then, the three-dimensional surface information m21 of the temporary coupling unit and the remaining three-dimensional surface information m20c of the temporary prosthesis separated from each other are erased. Here, it is preferable to understand that the term “erased” encompasses the deletion of the selected image or data within the overall image data and the transparent processing of invisibility.

In addition, in the second scanning image m2, the 3D surface information m2a of the restoration target arch and the post 3D surface information m5a with the outer e2 of the post 3D surface information m5a as a boundary. ) is separated. Then, the post 3D surface information m5a separated from the 3D surface information m2a of the restoration target arch is deleted.

Here, it is preferable that the three-dimensional surface information m21 of the temporary coupling part and the three-dimensional surface information m2a of the restoration target arch are virtually connected and integrated and stored as the corrected scanning image m5. Accordingly, the corrected scanning image m5 may include the three-dimensional surface information m21 of the temporary coupling part virtually disposed at an accurate position corresponding to the actual implantation position. At the same time, the corrected scanning image m5 may include three-dimensional surface information m2a of the restoration target arch that matches the surface of the gum part of the restoration target arch 2 .

In this case, the first scanning image m1 and the second scanning image m2 match the first comparison area and the second comparison area, so that they virtually overlap. Accordingly, the three-dimensional surface information m21 of the temporary coupling part replacing the post-three-dimensional surface information m5a may be virtually aligned at the correct position of the three-dimensional surface information m2a of the restoration target arch.

Moreover, in the first scanning image m1, the boundary line e3 is set to the outer side of the internal 3D surface information m20b of the temporary prosthesis including the temporary coupling part 3D surface information m21. desirable. In addition, it is preferable that the three-dimensional surface information of the outer surface of the temporary prosthesis, which is the remaining image area outside the boundary line e3, is set and erased as an erase area. Through this, the first scanning image m1 may be reset to a swap-corrected swap image m1r so that the three-dimensional surface information m21 of the temporary coupling unit m21 convexly protrudes to the outside.

Here, the scanned images are stored as plane information having substantially no thickness. Accordingly, in the three-dimensional surface information m21 of the temporary coupling unit, the coordinate values of the inner image data and the coordinate values of the outer image data are substantially the same. Accordingly, as the three-dimensional surface information m21 of the temporary coupling part included in the swap image m1r is exposed to the outside, intuitive confirmation is easily image-processed, so that it is easy to calculate the first comparison area. In addition, a state in which the first comparison area and the second comparison area are virtually overlapped may be visually and quickly and accurately determined. For example, a state in which the first comparison area and the second comparison area are virtually overlapped may be displayed by being distinguished by color or displayed as a numerical value. Through this, the image conformity between the first scanned image m1 and the second scanned image m2 may be remarkably improved.

7 is an exemplary diagram illustrating a matching process of a virtual coupling unit in an image data processing method for designing a dental restoration according to an embodiment of the present invention.

4 and 7, it is preferable that design information of the inner surface of the digital prosthesis is set based on the three-dimensional surface information m2a of the restoration target arch. Through this, the internal design information of the digital prosthesis may be set to match the three-dimensional surface information m2a of the restoration target arch. In addition, it is preferable that the virtual coupling part m51 set based on the three-dimensional surface information m21 of the temporary coupling part is included in the design information of the inner surface of the digital prosthesis. Through this, the design information m50 of the digital prosthesis can be accurately and precisely generated according to a pre-established dental restoration plan.

Here, it is preferable to understand that the virtual coupling unit m51 is pre-stored in the digital library in which three-dimensional external information corresponding to the coupling unit formed in the actual digital prosthesis is pre-stored. At this time, it is preferable that the digital library be understood as a database storage in which design information for a plurality of real implants and real abutments, and the virtual coupling part m51, which is design information for a real coupling part, are stored.

Then, from the digital library, the virtual coupling part m51 that is suitably matched with the implant 1 and the abutment 5 applied to the patient is selected and extracted, and the extracted virtual coupling part m51 is the It is loaded into the planning unit. In addition, the virtual artificial tooth part, which is design information of the artificial tooth part, may be extracted from the digital library and loaded into the planning part.

In addition, the crown portion of the virtual artificial tooth may be virtually occluded based on the 3D surface information m3b of the opposing tooth displayed in the third scanning image m3. In addition, a virtual connection part surrounding the lower end of the virtual artificial tooth part may be set on the root side of the virtual artificial tooth part. In this case, it is preferable that the inner surface of the virtual connection part is set corresponding to the three-dimensional surface information m2a of the restoration target arch.

On the other hand, it is preferable that the virtual combining unit m51 is selected and extracted from the digital library. In detail, the virtual coupling unit m51 is preferably selected and extracted as image data matching the specifications of the implant 1 and the abutment 5 placed and coupled to the patient's actual oral cavity. That is, the virtual coupling part m51 and the temporary coupling part 3D surface information m21 include a common part having substantially the same shape, and may be virtually overlapped with each other using the common part as matching information.

Here, it is preferable that the three-dimensional surface information m51 of the temporary coupling part virtually overlapped with the virtual coupling part m51 is deleted from the correction image m5. Accordingly, the integrated image M in which the virtual coupling unit m51 is integrated and stored in the three-dimensional surface information m2a of the restoration target arch can be generated. And, based on the integrated image M, the design information m50 of the digital prosthesis can be accurately and precisely generated.

8 is an exemplary view illustrating a registration process of a scanning image in an image data processing method for designing a dental restoration according to an embodiment of the present invention.

Referring to FIG. 8 , in the step of acquiring the scanning images, a fourth scanning image m4 of the maxilla and mandible in which the restoration target arch to which the temporary prosthesis is fixed and the antagonistic arch are occluded corresponding to the vertical height is obtained. It is preferable to obtain more. Accordingly, in the fourth scanning image m4, the labial 3D surface information m4c of the restoration target arch, the labial 3D surface information m4a of the temporary prosthesis, and the labial 3D surface information m4b of the opposing tooth are included in the fourth scanning image m4. may be included.

Then, the first scanning image m1, the second scanning image m2, and the third scanning image m3 are virtually superimposed on the basis of a common part with the fourth scanning image m4, so that the vertical height is can be matched to correspond.

The first scanning image m1 and the second scanning image m2 are based on the temporary coupling part 3D surface information m21 and the post 3D surface information m5a displayed at the same position in each image. Virtual nesting is possible. In addition, the first scanning image m1 and the fourth scanning image m4 are interdental displayed at the same location of the temporary prosthetic 3D surface information m20 and the labial 3D surface information m4a of the temporary prosthesis. It may be virtually superimposed based on the silk tissue image, such as an image. In addition, the third scanning image m3 and the fourth scanning image m4 are based on the 3D surface information m3b of the antagonist and the 3D surface information m4b of the labial tooth displayed at the same position. can be virtual nested.

In this case, the fourth scanning image m4 includes image information about the oral cavity in a state in which the patient's vertical height is considered. Accordingly, based on the fourth scanned image m4 , the first to third scanned images m1 to m3 may be easily virtually aligned to correspond to the vertical height. And, when the scanned images are virtually overlapped with each other, the fourth scanned image m4 may be erased. Then, the integrated image M may be generated through the above-described series of image processing processes.

As such, the present invention matches the three-dimensional surface information m21 of the temporary coupling part with the post three-dimensional surface information m5a, and then converts the three-dimensional surface information of the inner surface of the temporary prosthesis into the three-dimensional surface information of the restoration target arch. (m2a) can be used to accurately calculate design information for the inner surface and the coupling portion of the digital prosthesis.

Accordingly, the cumbersome process of relining the inner surface of the temporary prosthesis 20 to match the outer surface of the gums of the restoration target arch 2 can be omitted, so that the operation speed can be significantly improved. In addition, in the process of relining the temporary prosthesis 20, the first scanning image m1 obtained with respect to the temporary prosthesis 20 due to the inflow of the relining resin into the inner surface of the temporary coupling part 11. Since the problem including inaccurate information can be fundamentally eliminated, accuracy and precision can be remarkably improved.

At the same time, the post three-dimensional surface information m5a included in the three-dimensional surface information m2a of the restoration target arch is first as the three-dimensional surface information m21 of the temporary coupling part displayed in the scanning image of the temporary prosthesis. is replaced Subsequently, the three-dimensional surface information m21 of the temporary coupling part is finally replaced with the virtual coupling part m51, which is more clear design information. Through this, the coupling part formed in the digital prosthesis can be manufactured to have a minimum coupling tolerance that is substantially matched with the configuration of the upper end of the implant, so that precision can be further improved.

In addition, when the temporary cylinder 10 is embedded and fixed in the temporary prosthesis 20, the position of the temporary coupling part 11 can be precisely corrected through the occlusal pressure applied before the curable resin is cured. Therefore, since the design information of the coupling part is precisely acquired based on the scanning image of the temporary prosthesis, the intraoral installation precision of the final digital prosthesis can be significantly improved.

As described above, the present invention is not limited to each of the above-described embodiments, and variations can be implemented by those of ordinary skill in the art to which the present invention pertains without departing from the scope of the claims of the present invention. and such modifications are within the scope of the present invention.

The present invention can be applied to the manufacturing industry of dental restoration products.

Claims

The temporary prosthesis is such that the temporary cylinder formed inside the temporary coupling part is coupled to the upper end of the implant placed in the restoration target arch, and the temporary cylinder is inserted into the temporary buried hole formed at each position corresponding to the placement position of the implant in the temporary prosthesis. a first step of correcting the position of the temporary coupling part disposed in the restoration target arch and fixed to the temporary prosthesis to correspond to the implantation position;

A first scanning image of the corrected temporary prosthesis, a second scanning image of the restoration target arch to which the implant is fixed, and a third scanning image of the opposing arch are acquired through an imaging device and loaded into a planning unit. Step 2;

A corrected scanning image is obtained in which the three-dimensional surface information of the temporary coupling unit extracted from the first scanning image and the three-dimensional surface information of the restoration target arch extracted from the second scanning image are integrated, the corrected scanning image and the a third step of generating an integrated image by matching the third scanning image to correspond to a preset vertical height; and

The design information of the inner part is set to match the outer surface of the restoration target arch based on the 3D surface information of the restoration target arch included in the corrected scanning image, and the virtual set based on the 3D surface information of the temporary coupling part An image data processing method for designing a dental restoration comprising a fourth step of finally generating design information of a digital prosthesis as the coupling part is included in the design information of the inner surface part.
The method of claim 1,

In the third step, the corrected scanning image is

A first comparison area is calculated in the three-dimensional surface information of the temporary coupling part displayed in the shape of a concave groove in the first scanning image, and the post three-dimensionality of the abutment is displayed in a convexly protruding shape in the second scanning image. calculating a plurality of second comparison areas matching the first comparison area in the surface information;

the first and second comparison regions are virtually matched to each other so that the first scanned image and the second scanned image are virtually overlapped;

3D surface information of the restoration target arch, in which the 3D surface information of the inner surface of the temporary prosthesis displayed on the outer side of the post 3D surface information of the abutment is displayed on the outer side of the 3D surface information of the temporary coupling unit Image data processing method for designing a dental restoration, characterized in that obtained including the step of being replaced with a swap.
3. The method of claim 2,

The third step is

Separating and erasing the remaining 3D surface information of the temporary prosthesis with the boundary of the 3D surface information of the temporary coupling unit as a boundary in the first scanning image;

Separating and erasing the post 3D surface information of the abutment with the boundary of the post 3D surface information of the abutment as a boundary in the second scanning image;

The image data processing method for designing a dental restoration, characterized in that the three-dimensional surface information of the temporary coupling part and the three-dimensional surface information of the restoration target arch are virtually connected and integrated and stored as the corrected scanning image.
3. The method of claim 2,

The third step is

setting a boundary line to the outer side of the internal 3D surface information of the temporary prosthesis including the 3D surface information of the temporary coupling part in the first scanning image;

Swap correction so that the remaining image area outside the boundary line is set and erased as an erase area so that the three-dimensional surface information of the temporary coupling part protrudes convexly to the outside;

The fourth step is

The three-dimensional appearance information of the virtual coupling unit is selected and extracted from a digital library, and virtual overlapping of the 3D surface information of the temporary coupling unit and preset matching information as a common part;

The 3D surface information of the temporary coupling part is erased and the 3D external shape information of the virtual coupling part is integrated and stored in the 3D surface information of the restoration target arch and set as the design information of the digital prosthesis. Image data processing method for designing dental restorations.
3. The method of claim 2,

In the first step, the position of the temporary coupling part is

disposing the temporary prosthesis in the restoration target arch so that the temporary cylinder is inserted into the temporary buried hole;

Filling a curable resin between the temporary cylinder and the temporary buried hole;

The position of the temporary prosthesis is moved to match the opposing arch through occlusal pressure, the position of the temporary cylinder in the temporary buried hole is determined, and the curable resin is cured to fix the position of the temporary cylinder Image data processing method for designing a dental restoration, characterized in that it is corrected.
The method of claim 1,

The second step is

Further comprising the step of acquiring a fourth scanning image of the upper and lower mandibles in which the restoration target arch to which the temporary prosthesis is fixed and the opposing arch are occluded corresponding to the vertical height,

The third step is

and matching the first scanned image, the second scanned image, and the third scanned image to correspond to the vertical diameter by overlapping based on a common part with the fourth scanned image. Image data processing method for design.