KR20210136573A - Method for designing implant surgical guide to suggest optimized abutment and apparatus thereof - Google Patents

Abstract

Disclosed are a guide design method for implant surgery and a device thereof. According to one embodiment of the present invention, the guide design method for implant surgery and the device thereof can automatically provide abutment specifications including the gingival height (G/H) value of an abutment after arranging crowns virtually in image data and placing fixtures to match the arranged crowns.

Description

Method for designing implant surgical guide to suggest optimized abutment and apparatus thereof

The present invention relates to medical image processing technology.

When designing a guide for dental implant surgery using software, virtual crowns are arranged in a state in which bone quality is determined in advance and fixtures are placed based on the crown. For this reason, when surgery is performed using a commercialized digital implant system, not only can the fixture be placed in an accurate position, but also a high mechanical fixation force can be obtained. A prosthesis may be fastened to the patient. In this case, it is possible to provide aesthetic and functional satisfaction to the patient.

However, there is no function to suggest an abutment in image software including commercialized guide design software. Also, there is the inconvenience of having to design the abutment again with the oral data in the prosthetic design software, rather than designing the abutment in the guide design software.

According to one embodiment, when designing a guide for dental implant surgery using software, a guide design method for implant surgery and an apparatus thereof for automatically suggesting an optimized abutment are proposed.

The guide design method for implant surgery according to an embodiment includes the steps of arranging a crown virtually in image data, placing a fixture to match the arranged crown, and using the height from the top of the fixture to the gum line. The step of determining the gingival height (G/H, hereinafter referred to as 'G/H') value of the abutment, and displaying the abutment specification including the determined G/H value on the screen or on the surgical report including providing steps to

The step of determining the G/H value includes the steps of measuring the height from the top of the fixture to the gum line, checking the user set value for the margin type, and based on the gum line according to the checked user set value determining a G/H value.

Measuring the height from the top of the fixture to the gum line, generating both connection points located on the top of the fixture, measuring the vertical distance between the connection points and the gum line, the measured vertical determining the distance as the height from the top of the fixture to the gum line.

In the step of determining the G/H value based on the gum line, if the user set value for the margin type is a low margin condition, the G/H value is determined so that the abutment margin line is located below the preset distance from the gum line. can At this time, the maximum integer value smaller than the G/H value determined among the specifications in the abutment library may be finally determined as the G/H value.

In the step of determining the G/H value based on the gum line, if the user set value for the margin type is the upper margin, the G/H value can be determined so that the abutment margin line is located above the preset distance from the gum line. have. At this time, the minimum integer value greater than the G/H value determined among the specifications in the abutment library may be finally determined as the G/H value.

The step of determining the G/H value includes determining whether the determined G/H value of the abutment is greater than or equal to a preset maximum value in the abutment library, and if greater than the preset maximum value, warning information is generated and displayed on the screen It may include the step of outputting.

The guide design method for implant surgery further includes the step of determining the height of the crown insertion part within the abutment (A/H, hereinafter referred to as 'A/H'). In the step, when the G/H value is determined, the A/H value may be determined by subtracting the length considering the strength of the prosthesis from the lowest height of the crown or the highest height of the opposing tooth.

The guide design method for implant surgery may further include determining the diameter value of the abutment by reflecting the widths of the mesial, distal, buccal and lingual sides of the crown when the G/H value is determined.

Guide design device for implant surgery according to an embodiment, a data acquisition unit for acquiring image data, and determining the specification of the abutment from the acquired image data, using the height from the top of the fixture to the gum line It includes a control unit that determines the G/H value of the abutment, and an output unit that displays the determined abutment specification on the screen or provides through a surgical report.

The controller may measure the height from the top of the fixture to the gum line, check the user set value for the margin type, and determine the G/H value based on the gum line according to the checked user set value.

The controller may generate both connection points located on the top of the fixture, measure the vertical distance to both connection points and the gum line, and determine the measured vertical distance as the height from the top of the fixture to the gum line.

When the user set value for the margin type is a low margin condition, the control unit determines the G/H value so that the abutment margin line is located below a preset distance from the gum line, and the user set value for the margin type is the upper margin In the case of , the G/H value may be determined so that the abutment margin line is located above a preset distance from the gum line.

The controller determines the A/H value within the abutment, but when the G/H value is determined, the A/H value may be determined by subtracting the length in consideration of the strength of the prosthesis from the lowest height of the crown or the highest height of the opposing tooth .

According to the guide design method and device for implant surgery according to an embodiment, after designing a virtual crown and fixture when designing a guide for dental implant surgery, the user's abutment specification is automatically determined and suggested accordingly. It can provide convenience.

1 is a view showing the structure of an abutment according to an embodiment of the present invention;
2 is a view showing the configuration of a guide design device for implant surgery according to an embodiment of the present invention;
3 is a diagram illustrating an automatic determination process of an abutment specification according to an embodiment of the present invention;
4 is a video screen showing a state in which a virtual crown is arranged to fit the opposing teeth according to an embodiment of the present invention;
5 is a view showing a CT cross-sectional image after crown arrangement according to an embodiment of the present invention;
6 is a view showing a CT cross-sectional image in which a fixture is placed on the basis of the central axis of the virtual crown according to an embodiment of the present invention;
7 is a view showing an image screen for determining the height from the top of the fixture to the gum line according to an embodiment of the present invention;
8 is a view showing both connection points on a fixture according to an embodiment of the present invention;
9 is a view showing the distance in contact with the gum line of the fixture according to an embodiment of the present invention;
10 is a video screen showing automatically determining the G/H value of the abutment when the user set value for the margin type is the lower margin according to an embodiment of the present invention;
11 is a view for explaining a lower margin according to an embodiment of the present invention;
12 is a video screen showing automatically determining the G/H value of the abutment when the user set value for the margin type is the upper margin according to an embodiment of the present invention;
13 is a view for explaining an upper margin according to an embodiment of the present invention;
14 is a view showing an image screen for determining the A / H value of the abutment according to an embodiment of the present invention;
15 is a view showing an image screen for determining the A / H value of the abutment according to another embodiment of the present invention;
16 is a view showing an image screen for finally determining the A/H value of the abutment in consideration of the strength of the crown according to an embodiment of the present invention;
17 is a view showing an image screen for determining the A/H value of the abutment in the abutment A/H specification according to an embodiment of the present invention;
18 is a view showing an image screen for determining the A/H value of the abutment when the vertical space is insufficient due to the crystallization of the opposing tooth according to an embodiment of the present invention;
19 is a view showing an image screen for automatically determining the diameter value of the abutment according to an embodiment of the present invention;
20 is a view showing an image screen for finally determining the abutment diameter value when the abutment diameter value determined according to an embodiment of the present invention is smaller than the specification in the abutment library;
21 is a view showing a screen for automatically providing an abutment specification determined automatically in conjunction with a surgical report according to an embodiment of the present invention;
22 is a view showing that it is possible to set the specifications of the abutment in both the CT cross-sectional image data and the surface data in which the crown is arranged according to an embodiment of the present invention.

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In the description of the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted, and the terms to be described later are used in the embodiment of the present invention. These terms are defined in consideration of the function of Therefore, the definition should be made based on the content throughout this specification.

Each block in the accompanying block diagram and combinations of steps in the flowchart may be executed by computer program instructions (execution engine), which computer program instructions are executed by the processor of a general-purpose computer, special-purpose computer, or other programmable data processing device. It may be mounted so that its instructions, which are executed by the processor of a computer or other programmable data processing device, create means for performing the functions described in each block of the block diagram or in each step of the flowchart.

These computer program instructions may also be stored in a computer-usable or computer-readable memory that may direct a computer or other programmable data processing device to implement a function in a particular manner, and thus the computer-usable or computer-readable memory. It is also possible for the instructions stored in the block diagram to produce an article of manufacture containing instruction means for performing the functions described in each block of the block diagram or each step of the flowchart.

And since the computer program instructions may be mounted on a computer or other programmable data processing device, a series of operational steps is performed on the computer or other programmable data processing device to create a computer-executable process to create a computer or other programmable data processing device. It is also possible that the instructions for performing the data processing apparatus provide steps for executing the functions described in each block of the block diagram and each step of the flowchart.

In addition, each block or step may represent a module, segment, or portion of code comprising one or more executable instructions for executing specified logical functions, and in some alternative embodiments the blocks or steps referred to in the block or steps. It should be noted that it is also possible for functions to occur out of sequence. For example, it is possible that two blocks or steps shown one after another may be performed substantially simultaneously, and also the blocks or steps may be performed in the reverse order of the corresponding functions, if necessary.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention illustrated below may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art to which the present invention pertains.

1 is a view showing the structure of an abutment according to an embodiment of the present invention.

Referring to FIG. 1 , the abutment 60 includes a fixture fitting portion 61 , a gum portion 62 , and a crown insertion portion 63 . The abutment 60 is a cylindrical body close to a cylinder, and is configured so that a screw for installation in the fixture can be inserted inside the abutment 60 .

The fixture fitting portion 61 is disposed on the fixture side of the abutment 60 and is a portion fitted to the inside of the fixture. The shape for fitting is determined by the shape of the fixture. The gum portion 62 is a region continuously formed in the oral cavity direction from the fixture fitting portion 61 . The gum portion 62 is a portion that enters the gum. The crown insertion portion 63 is a portion continuously formed in the oral cavity direction from the gum portion 62 . Insert the crown insertion part 63 into the crown to fix the crown. An abutment margin line 64 is formed at the boundary between the gum portion 62 and the crown insertion portion 63 . The height of the gum portion 62 is referred to as Gingival Height (G/H, hereinafter referred to as 'G/H'), and the height of the crown insertion unit 63 is referred to as Abutment Height (A/H, hereinafter referred to as 'A/H'). called). In FIG. 1, the crown insertion part 63 has been described as an example when the prosthesis is a crown, but it can be replaced with a prosthesis other than the crown.

2 is a diagram illustrating the configuration of a guide design device for implant surgery (hereinafter, referred to as a 'guide design device') according to an embodiment of the present invention.

Referring to FIG. 2 , the guide design device 1 is an electronic device capable of executing a dental program such as a guide design program for dental implant surgery. The electronic device includes a computer, a notebook computer, a laptop computer, a tablet PC, a smart phone, a mobile phone, a personal media player (PMP), and personal digital assistants (PDA). In addition to the guide design program, the dental program includes a scan program, a CAD program, and a medical imaging program. In addition, it can be applied to other general medical programs in addition to dental implant surgery.

The implant placement design process using a dental program such as a guide design program includes surgical patient registration, CT data and oral model data acquisition of registered patients, registration of CT data and oral model data, and arch line creation and arch from the matched image data. Process including creation of panoramic image using line, determination of crown model position and size from patient's oral model data, positioning of implant structure including fixtures from patient's CT data, guide shape design, and final guide output is composed of

The present invention relates to a process of automatically or manually determining the position of a crown and a fixture in a program among the above processes, and then automatically determining an optimal abutment and suggesting it on a program. In this case, since the user can omit the process of searching for the optimal abutment, the user's predictable trial and error can be reduced, and a surgical plan can be established with reference to this.

Hereinafter, the configuration of the guide design device 1 having the above-described characteristics will be described with reference to FIG. 2 .

Referring to FIG. 2 , the guide design apparatus 1 according to an embodiment includes a data acquisition unit 10 , a storage unit 12 , a control unit 14 , an input unit 16 , and an output unit 18 .

The data acquisition unit 10 acquires image data from a patient. Image data required for fixture placement include CT data and oral model data. The data acquisition unit 10 may execute CT data and oral model data in a program or load data stored in a web page and a server.

The oral model data is data having information on actual teeth including damaged teeth. The oral model data may be obtained by scanning a plaster model created by imitating a patient's mouth with a 3D scanner. As another example, it may be obtained by scanning the inside of the patient's oral cavity using a 3D intra-oral scanner. The acquired oral model data may be stored in the storage unit 12 .

CT data may be obtained by generating tomography images of the patient's head using computed tomography (CT), segmenting the tooth boundaries in each tomography image, and combining them into one. These oral model data and CT data are images obtained by imaging the maxillary teeth under the maxillary teeth with the patient's mouth open, images obtained by imaging the mandibular teeth above the mandibular teeth with the patient's mouth open, and local areas with the mouth closed. Images obtained, oral radiographs, etc. are included. The acquired CT data may be stored in the storage unit 12 .

The storage unit 12 stores various data such as information necessary for performing the operation of the guide design apparatus 1 for implant surgery and information generated according to the operation. In the storage unit 12 according to an embodiment, oral model data and CT data of an individual patient are stored, and a user requests oral model data and CT data of a specific patient from among all oral model data and CT data during dental treatment simulation. may be provided to the control unit 14 according to the At this time, the storage unit 12 stores the images of the upper and lower teeth of each patient, and sends the images of the upper and lower teeth matching the oral model data and CT data of a specific patient to the user's request. It can be provided to the control unit 14 according to

The storage unit 12 according to an embodiment has a library composed of a plurality of tooth models. The plurality of tooth models include designs modeling virtual crowns, abutments, fixtures, and the like. In the abutment library, specifications such as G/H value, A/H value, and diameter of the abutment are defined in advance.

The control unit 14 controls each component while establishing an implant placement plan through control by a computer program. The control unit 14 manages screen information displayed on the screen through the output unit 18 and performs a simulation of implanting a virtual object in a medical image. A medical image in which a virtual object is implanted refers to a two-dimensional, three-dimensional, or the like, multidimensional image in which a patient's tooth arrangement is generated for establishing an implant surgery plan. Various types of images such as X-ray, CT, MRI, panoramic image, oral scan image, image generated through reconstruction, and image obtained by matching multiple images can be used for implant surgery planning.

The control unit 14 according to an embodiment automatically determines the abutment specification optimized for the implantation environment after arranging the crown and the fixture on the image data virtually. At this time, the control unit 14 promotes the convenience of the user by designing the virtual crown and the fixture, and then automatically determining the abutment suitable for it and suggesting it to the user. The abutment specification including the G/H value, A/H value, and diameter of the abutment can be automatically determined and displayed on the screen or suggested through a surgical report according to the location of the finally designed fixture. Accordingly, the user's convenience is increased, and the user does not need to fit the abutment in the oral cavity after surgery. In addition, there is an advantage in that the user does not have to individually determine the specifications of the abutment by importing data into the prosthetic software.

The controller 14 according to an embodiment determines the G/H value of the abutment from both connection points on the top of the fixture to the gum line after the virtual crown is arranged and the fixture is designed accordingly. After that, the A/H value of the abutment may be determined first or the diameter of the abutment may be determined first. If the A/H value is automatically determined first, the A/H value can be determined by subtracting the length considering the strength of the prosthesis from the lowest height of the crown or the highest height of the opposing tooth from the G/H value. The diameter of the abutment may be automatically determined from the determined G/H value in consideration of the mesial, distal, buccal and lingual widths of the virtual crown.

The control unit 14 automatically determines the abutment specification including the G/H value, A/H value, and diameter value of the abutment in this way, and displays the appropriate product code on the screen or automatically reflects it in the surgery report. By giving the user convenience, it is possible to provide.

The input unit 16 receives a user manipulation signal. For example, when implantation information is determined by the control unit 14 and necessary for image data in which the virtual object is displayed through the output unit 18, a user operation for adjustment is input to adjust the position and angle of the virtual object. can

The output unit 18 displays the image data on the screen. In this case, the output unit 18 may display a simulation of arranging a virtual object at an implantation position of the image data before the actual prosthetic treatment is performed. The output unit 18 may display a simulation in which the abutment is virtually disposed at the target position, the fixture and the abutment are fastened, and the crown is inserted in the upper portion of the abutment. The output unit 18 may display the optimal abutment information determined through the control unit 14 on the screen.

3 is a diagram illustrating an automatic abutment specification determination process according to an embodiment of the present invention.

2 and 3 , the guide design device 1 arranges the virtual crown to match the opposing teeth (S310), and automatically or manually places the fixture to match the arranged crown (S320). At this time, the position, direction and depth of the fixture are determined.

Then, the height from the top of the fixture to the gum line is automatically determined as the abutment G/H value (S330). The gum line can be obtained from the gum margin in the oral scan data. The guide design apparatus 1 may automatically determine the G/H value according to the user's margin type setting value. For example, when the margin type setting value is the lower margin, the G/H value is determined so that the abutment margin line is located below a preset distance (eg, 0.5 to 1.0 mm) from the gum line. In the case of the upper margin, the G/H value is determined so that the abutment margin line is located above a preset distance (eg, 0.5 to 1.0 mm) from the gum line. As a default value, the lower margin condition can be set from the anterior teeth to the first premolars, and the upper margin conditions can be set from the second premolars to the second molars.

When the G/H value of the abutment is determined, the guide design device 1 automatically determines from the G/H value to the highest part of the opposing tooth, or the lowest part of the virtual crown to the A of the abutment. /H value is automatically determined (S340). At this time, in consideration of the strength of the crown, the height obtained by subtracting a preset distance (eg, 1.5 to 2.0 mm) may be automatically determined as the A/H value.

When the G/H value of the abutment is determined, the guide design device 1 automatically determines the diameter of the abutment by the widths of the mesial, distal, buccal and lingual sides of the crown at the position where the G/H value is determined. It can be determined (S350).

After the specifications (G/H, A/H, diameter) of the abutment are automatically determined by the above steps, the guide design device 1 displays the determined specifications of the abutment on the screen or on the surgical report. provided to (S360). At this time, it is possible to record the determined specification of the abutment on the surgical report and automatically link up to the product code.

직경

A/H). 단계 S310~S350을 차례대로 진행하는 방법은 G/H

A/H

직경을 차례대로 결정하는 방식이다. G/H 값을 결정해야, 즉 보철물의 마진 위치를 결정해야 A/H 값을 더 정확하게 측정할 수 있거나 직경 값을 더 정확하게 측정할 수 있으므로 가장 우선적으로 G/H 값을 결정한다.After steps S310 to S330, step S350 may be performed, and then step S340 may be performed (G/H

diameter

A/H). How to proceed with steps S310 to S350 in sequence is G/H

A/H

A method of determining the diameter in turn. The G/H value must be determined, that is, the margin position of the prosthesis must be determined so that the A/H value can be measured more accurately or the diameter value can be measured more accurately, so the G/H value is determined first.

4 is an image screen illustrating a state in which a virtual crown is arranged to fit an opposing tooth according to an embodiment of the present invention.

2 and 4 , the guide design device 1 arranges a virtual crown to fit the opposing teeth. To this end, after matching the patient's surface data with the CT data, the virtual crown is arranged to match the opposing teeth using the upper and lower mandibular surface information of the three-dimensional oral data.

For example, as shown in FIG. 4 a, the crown 30 has the width of the mesial and distal surfaces set based on the adjacent values on both sides, and in FIG. 4 b As shown, the length of the crown 30 is set based on the shape of the antagonist teeth from the gum of the surface data. In addition, as shown in FIG. 3c , the buccal and lingual widths of the virtual crown 30 are determined by the widths of the buccal and lingual of the opposing teeth.

5 is a view showing a CT cross-sectional image after crown arrangement according to an embodiment of the present invention.

Referring to FIG. 5 , when the user automatically or manually arranges the crown on the three-dimensional oral data, the crown 30 arranged on the CT cross-sectional image (eg, cross-sectional image) can be confirmed.

6 is a view showing a CT cross-sectional image in which a fixture is placed on the basis of the central axis of the virtual crown according to an embodiment of the present invention.

2 and 6 , the guide design device 1 determines the position, direction, and depth of the fixture 50 using the central axis and surrounding structures of the virtual crown 30 . For example, the position of the fixture 50 is determined to be located at the center of the crown 30 with the same central axis with respect to the central axis of the crown 30 . Furthermore, the position of the fixture 50 may be determined by additionally considering relational information between the fixture 50 and the surrounding structures (eg, alveolar bone and adjacent teeth). For example, the fixture 50 automatically or manually determines the location of the fixture 50 to be located inside the alveolar bone (51). At this time, the implantation of the fixture 50 may be performed while checking the alveolar bone information of the CT data.

7 is a view showing an image screen for determining the height from the top of the fixture to the gum line according to an embodiment of the present invention, Figure 8 is a view showing both connection points on the fixture according to an embodiment of the present invention FIG. 9 is a view showing a distance in contact with the gum line of the fixture according to an embodiment of the present invention.

Referring to FIG. 7 , when the surface data and the CT data are matched, the margin information of the gum and the cross-sectional information of the CT data are expressed together in one section of the CT data and the oral model data. At this time, the height from the uppermost end of the fixture 50 to the gum line 70 is determined. For example, as shown in FIG. 8 , a connection line 75 connecting both connection points 71 and 72 on the uppermost end of the fixture 50 is generated. Both connection points 71 and 72 are portions where the abutment and the fixture 50 come into contact with each other. Then, as shown in FIG. 9, the vertical distances 73 and 74 to both connection points 71 and 72 and the gum line 70 are automatically measured. Both connection points (71, 72) and the vertical distance (73, 74) to the gum line (70) becomes the height from the top of the fixture (50) to the gum line (70).

10 is a video screen illustrating automatically determining the G/H value of the abutment when the user set value for the margin type is the lower margin according to an embodiment of the present invention, and FIG. 11 is a view of the present invention. It is a diagram for explaining a lower margin according to an embodiment.

Referring to FIGS. 10 and 11 , when the user set value for the margin type is a lower margin condition, as shown in FIG. 11 , a preset distance (for example, 0.5 to 1.0 mm) from the gum line 110 is The G/H value may be determined such that the butt margin line 64 is located. At this time, if the determined G/H value is not an integer, a maximum integer smaller than the G/H value determined in the abutment library may be determined as the G/H value. For example, when the vertical distances 73 and 74 to both the connecting points 71 and 72 and the gum line 70 measured as shown in FIG. 10 are 4.26 mm and 4.15 mm, respectively, if the lower margin condition The G/H value of the abutment becomes 4 mm. As shown in FIG. 11 , the lower margin condition refers to a case where the abutment margin line 64 is located under the gum 110 , and is generally used for aesthetic areas.

Furthermore, when the automatically determined G/H value is 4 mm under the lower margin condition of FIG. 10 , when the height of one side is 0.15 mm different, the upper margin or the equal margin may be due to the error of the guide. Therefore, the G/H value may be determined to be 3mm according to the user setting value. For example, the automatically determined G/H value is 4mm, but in the lower margin condition (0.3mm lower margin condition) the user sets the height from the top of the fixture 50 to the gum line 70 to be lower than 0.3mm, the final G/H The H value will be 3mm instead of 4mm.

12 is a video screen illustrating automatically determining the G/H value of the abutment when the user set value for the margin type is the upper margin according to an embodiment of the present invention, and FIG. 13 is a view of the present invention. It is a diagram for explaining an upper margin according to an embodiment.

12 and 13, when the user set value for the margin type is the upper margin condition, as shown in FIG. 13, a preset distance (eg, 0.5 to 1.0 mm) from the gum line 130 above The G/H value may be determined so that the abutment margin line 64 is located. In this case, if the determined G/H value is not an integer, a minimum integer greater than the G/H value determined in the abutment library may be determined as the G/H value. For example, if the vertical distances 73 and 74 to both the connecting points 71 and 72 and the gum line 70 measured as shown in FIG. 12 are 4.26 mm and 4.15 mm, respectively, if the upper margin condition is The G/H value of the abutment becomes 5mm. As shown in FIG. 13 , the upper margin condition refers to a case where the abutment margin line 64 is on the gum 110 , and is generally used in the molar region to obtain good periodontal results.

The guide design device generates warning information when the fixture needs to be placed deeply or the thickness of the gum is thick and the G/H value of the abutment exceeds the preset maximum value (for example, 7mm) in the abutment library. It can be printed on the screen. For example, it provides a warning that there are restrictions on the selectable abutments. In this case, the user may manually determine the abutment through user manipulation, or may omit the abutment selection on the software.

After determining the G/H value of the abutment, the guide design device may determine the diameter value of the abutment and then determine the A/H value. As another example, after determining the G/H value of the abutment, the diameter value of the abutment may be determined and then the A/H value may be determined. As such, the G/H value must be determined first, that is, the margin position of the prosthesis must be determined so that the A/H value of the abutment can be measured more accurately or the diameter value can be measured more accurately. to decide Hereinafter, an embodiment of determining the A/H value will be described with reference to FIGS. 14 to 18 , and an embodiment of determining the diameter value will be described with reference to FIGS. 19 to 20 .

14 is a diagram illustrating an image screen for determining an A/H value of an abutment according to an embodiment of the present invention.

2 and 14 , after the G/H value of the abutment is automatically determined, the guide design device 1 moves vertically from the abutment margin line 64 to the uppermost end 142 of the opposing tooth 140 . The distance 144 may be measured and the measured value 144 may be determined as the A/H value of the abutment.

15 is a diagram illustrating an image screen for determining an A/H value of an abutment according to another embodiment of the present invention.

2 and 15 , after the G/H value of the abutment is automatically determined, the guide design device 1 sets the vertical distance from the abutment margin line 64 to the lowest end 150 of the crown 30 . (152) is measured to determine this measured value 152 as the A/H value of the abutment (6.29 mm in FIG. 15).

16 is a view showing an image screen for finally determining the A/H value of the abutment in consideration of the strength of the crown according to an embodiment of the present invention.

2 and 16 , the guide design device 1 determines the strength of the crown at the A/H value of the abutment (6.29 mm in FIG. 16 ) determined as described above with reference to FIGS. 14 and 15 . In consideration of this, a value (4.29 mm in FIG. 16 ) obtained by subtracting a preset distance (eg, 1.5 to 2.0 mm) is determined as the final A/H value of the abutment.

17 is a diagram illustrating an image screen for determining an A/H value of an abutment in an abutment A/H specification according to an embodiment of the present invention.

Referring to FIG. 17, assuming that the height specification of the abutment is 4.0 mm, 5.5 mm, and 7.0 mm, as described above with reference to FIG. 16, if the A/H final value of the abutment is 4.29 mm, FIG. As shown in Fig., the A/H value of the abutment is automatically determined as 4.0mm. Since the A/H specification of the abutment is different for each manufacturer, the specification is defined as an example in the present invention, and the present invention is applied according to the specification for each system.

18 is a view showing an image screen for determining the A/H value of the abutment when the vertical space is insufficient due to the crystallization of the opposing tooth according to an embodiment of the present invention.

Referring to FIG. 18 , when the vertical space is insufficient due to the crystallization of the antagonist, the minimum height value (eg, 4 mm) of the abutment cannot be selected. In this case, warning information may be output to the user. For example, it provides a warning message 'The abutment height is 4 mm or less'. In this case, the user may selectively select the abutment, or the abutment selection step may be omitted on the software.

19 is a diagram illustrating an image screen for automatically determining a diameter value of an abutment according to an embodiment of the present invention.

Referring to FIGS. 2 and 19 , the guide design device 1 automatically determines the diameter value using the widths of the mesial, distal, hematological and lingual sides of the crown after the G/H value is determined. For example, if the software increases the diameter value of the abutment by 1 mm and comes into contact with any one of the width diameters of the mesial, distal, buccal and lingual sides of the crown 30, the length at this time is set to the diameter of the abutment. value is automatically determined.

As another example, after the G/H value is determined, the mesial, distal, buccal and lingual widths of the crown 30 are measured, and the diameter of the abutment is automatically determined based on the smallest size. If the diameter of the virtual crown does not fall to an integer in all of the widths of the mesial, distal, buccal and lingual sides, the diameter of the abutment is determined by one notch smaller than the decimal point.

20 is a diagram illustrating an image screen for finally determining an abutment diameter value when the abutment diameter value determined according to an embodiment of the present invention is smaller than a specification in the abutment library.

Referring to FIG. 20 , when the determined abutment diameter value is greater than the maximum diameter value (eg, 7.0 mm) in the abutment library, the maximum diameter value (eg, 7.0 mm) is obtained from the abutment library. determined as the final value.

21 is a diagram illustrating a screen for automatically providing an abutment specification determined automatically in conjunction with a surgery report according to an embodiment of the present invention.

Referring to Figure 21, the guide design device automatically records the specifications (G/H, A/H, diameter) of the abutment in the surgical report (Surgical Report) 210 after automatically determining the specifications of the abutment and record the product code as well. In the case of product code, GSTA is prefixed and can be entered in the order of diameter, A/H, and G/H. For example, as in reference numeral 212 of FIG. 21 , A/H: 4.0 mm, diameter: 7.0 mm, G/H 5.0 mm, product code GSTA7450 is provided.

22 is a view showing that it is possible to set the specification of the abutment in both the CT cross-sectional image data and the surface data in which the crown is arranged according to an embodiment of the present invention.

Referring to FIG. 22 , the specifications of the abutment may be set in both the CT cross-sectional image 221 and the surface data 222 in which the crown and the fixture are arranged.

So far, the present invention has been looked at focusing on the embodiments thereof. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in modified forms without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (15)

Virtually arranging crowns in the image data;
placing a fixture to fit the arranged crown;
determining a gingival height (G/H, hereinafter referred to as 'G/H') value of the abutment using the height from the top of the fixture to the gum line; and
displaying the abutment specification including the determined G/H value on the screen or providing it on a surgical report;
Guide design method for implant surgery, comprising a. The method of claim 1, wherein determining the G/H value comprises:
Measuring the height from the top of the fixture to the gum line; and
checking a user-set value for the margin type; and
determining the G/H value based on the gum line according to the confirmed user setting value;
Guide design method for implant surgery, comprising a. According to claim 2, wherein the step of measuring the height from the top of the fixture to the gum line
generating both connection points located on the top of the fixture;
Measuring the vertical distance to both connection points and the gum line; and
determining the measured vertical distance as the height from the top of the fixture to the gum line;
Guide design method for implant surgery, comprising a. The method of claim 2, wherein the determining of the G/H value based on the gum line comprises:
When the user set value for the margin type is a lower margin condition, the guide design method for implant surgery, characterized in that the G/H value is determined so that the abutment margin line is located below a preset distance from the gum line. The method of claim 4, wherein the determining of the G/H value based on the gum line comprises:
A guide design method for implant surgery, characterized in that the maximum integer value smaller than the G/H value determined during the specifications in the abutment library is finally determined as the G/H value. The method of claim 2, wherein the determining of the G/H value based on the gum line comprises:
When the user set value for the margin type is the upper margin, the guide design method for implant surgery, characterized in that the G/H value is determined so that the abutment margin line is located above the preset distance from the gum line. The method of claim 6, wherein the determining of the G/H value based on the gum line comprises:
A guide design method for implant surgery, characterized in that the minimum integer value greater than the G/H value determined among the specifications in the abutment library is finally determined as the G/H value. The method of claim 1, wherein determining the G/H value comprises:
determining whether the determined G/H value of the abutment is greater than or equal to a preset maximum value in the abutment library; and
generating warning information if it is greater than or equal to a preset maximum value and outputting it on a screen;
Guide design method for implant surgery, comprising a. The method of claim 1, wherein the guide design method for implant surgery is
Determining a height of the crown insertion portion within the abutment (A/H, hereinafter referred to as 'A/H') value; further comprising,
The steps to determine the A/H value are
When the G/H value is determined, the guide design method for implant surgery, characterized in that the A/H value is determined by subtracting the length considering the strength of the prosthesis from the lowest height of the crown or the highest height of the opposing tooth. The method of claim 1, wherein the guide design method for implant surgery is
when the G/H value is determined, determining the diameter value of the abutment by reflecting the widths of the mesial, distal, buccal and lingual sides of the crown;
Guide design method for implant surgery, characterized in that it further comprises. a data acquisition unit for acquiring image data;
A control unit that determines the specifications of the abutment from the obtained image data, and determines the G/H value of the abutment by using the height from the top of the fixture to the gum line; and
an output unit that displays the determined abutment specification on the screen or provides through a surgical report;
Guide design device for implant surgery, characterized in that it comprises a. 12. The method of claim 11, wherein the control unit
Measure the height from the top of the fixture to the gum line
Check the user set value for the margin type,
Guide design device for implant surgery, characterized in that the G/H value is determined based on the gum line according to the confirmed user setting value. 13. The method of claim 12, wherein the control unit
Create both connection points located on the top of the fixture and
Measure the vertical distance from both connection points to the gum line.
Guide design device for implant surgery, characterized in that determining the measured vertical distance as the height from the top of the fixture to the gum line. 13. The method of claim 12, wherein the control unit
If the user set value for the margin type is a lower margin condition, the G/H value is determined so that the abutment margin line is located below the preset distance from the gum line,
When the user set value for the margin type is the upper margin, the guide design device for implant surgery, characterized in that the G/H value is determined so that the abutment margin line is located above the preset distance from the gum line. 12. The method of claim 11, wherein the control unit
The A/H value in the abutment is determined, but when the G/H value is determined, the A/H value is determined by subtracting the length considering the strength of the prosthesis from the lowest height of the crown or the highest height of the opposing tooth Guide design device for implant surgery.

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