KR101538289B1 - implant construct - Google Patents

Abstract

The present invention relates to an implant structure for extracting three-dimensional scan data for manufacturing an implant upper prosthesis and a manufacturing method of a prosthesis using the implant structure. The implant structure comprises: a fixture implanted in a jawbone; an abutment inserted into the fixture; and the prosthesis attached to the abutment, and forming an appearance of a tooth. The abutment comprises: an insertion portion inserted into the fixture; an assembly portion protruding toward the inside of a mouth, and where the prosthesis is attached; and a scan cap having a hollow portion to be coupled to the assembly portion of the abutment in order to calculate location values of the fixture and the abutment. Therefore, the present invention enables to manufacture the prosthesis which has high goodness-of-fit to various kinds of implants without using a scan body.

Description

[0001] The present invention relates to an implant construction for extracting three-dimensional scan data for manufacturing an upper prosthesis of an implant,

The present invention relates to an implant structure for extracting three-dimensional scan data for the preparation of an upper prosthesis for an implant, and is capable of accurately and precisely fabricating a prosthesis using a CADCAM system by extracting accurate scan data through a three-dimensional scanner irrespective of an implant type will be.

Generally, the implant is made of titanium and consists of a fixture to be placed in the jawbone, an abutment to be inserted and fixed in the fixture, and a prosthesis to be adhered to cover the upper part of the abutment.

The fixture is placed in the jawbone to act as a root, and the prosthesis is made in a shape similar to a tooth to form the external shape of the artificial tooth. The abutment fixes the prosthesis to the fixture and transfers the load acting on the prosthesis to the fixture and jawbone It plays a role.

On the other hand, the CADCAM system in the dentistry manages all the processes from the design to the manufacture of the product by computer. In the past, the prosthesis was manually reproduced. However, when reproduced by hand, the reproducibility of the prosthesis is very low, Since the reproducibility of the used prosthesis is so high as to be almost perfect, the fabrication of the prosthesis using the camcam system is gradually increasing for correct operation.

In the process of fabricating the prosthesis using the CADCAM system, the scan body is inserted into the tooth bone after the patient's impression is first taken, and the scan body is scanned with the 3D scanner to secure the 3D scan data of the tooth bone with the scan body fixed to the implant Or fixes the abutment in the oral cavity, and then scans it with a three-dimensional scanner to secure three-dimensional scan data. Then, the scan body shape in the obtained three-dimensional scan data is compared with the shape file of the abutment inputted in advance, and the position of the fixture position of the tooth to be implanted, and the position of the accurate depth, direction and center coordinate are extracted The design is calculated, and the prosthesis is manufactured accordingly.

However, there are various types of implants in the market. In particular, the abutment used in the implant procedure is an abutment for holding the prosthesis by fixing it to the fixture, so that the characteristics of the implant are significantly distinguished in the abutment structure.

In other words, in the abutment, the part to be combined with the fixture is formed into a polygonal shape (hexa type, octa type, or the like) so as to be fitted only in a specified direction. However, A biconic type (non-hexa type) abutment that is fixed to the fixture is also often used.

Bicon type is a structure in which fixture and abutment are joined with each other in a wedge shape. By completely blocking the gap between the abutment and fixture, it is possible to prevent bacterial penetration, odor and vibration, and loss of gum bone Because of its advantages, it can increase the implant effect and the procedure is recommended for the long term because of the high success rate of the procedure.

In particular, a biconic type abutment is very useful because it is assembled into a fixture with no directionality when multiple teeth, i.e., two or more teeth, are connected to an implant.

However, the abutment having the polygonal assembly part is able to utilize the library (all the data information for manufacturing the prosthesis using the scan body as a reference point) since the direction to the fixture is specified, and thus the modeling data can be extracted accurately, The biconical type that is fixed to the fixture by simple fitting without using the screw is used to force the abutment to be fastened without using a screw when fastening the abutment to the fixture so that the depth to which the abutment is fastened to the fixture or the direction of fastening is specified It is impossible to utilize the library of the CAD cam apparatus, and there is an inevitable error in manufacturing the prosthesis.

In addition, recently, a method of extracting three-dimensional scan data immediately in oral cavity (oral method) is often used. Since abutment is mainly made of titanium or titanium alloy material, scan data can not be obtained, In the case of three-dimensional information to be scanned, the scan data is obtained using a three-dimensional scanner by surface-treating the abutment with a material extractable from the scan data.

However, if the abutment surface is processed, the accuracy of the scan data will be degraded. That is, since the surface-treated thickness itself affects the scan data, an error occurs in the process of manufacturing the prosthesis, which results in a poor fit between the abutment fixed to the fixture and the prosthesis.

In addition, if an error occurs in the coupling relation between the abutment and the prosthesis, it will affect the tooth occlusion of the maxilla and mandible. Therefore, a solution is required.

KR 101359377 B1

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to make it possible to obtain accurate three-dimensional stereoscopic data for the preparation of a prosthesis irrespective of the shape of the implant or the structure in which the abutment is fastened to the fixture, The present invention has been made to solve the above problems.

It is possible to accurately extract the three-dimensional data in the oral cavity for the preparation of the prosthesis irrespective of the type of the implant according to the abutment and fixture structure and to further improve the implant fit by producing the prosthesis based on the accurate three- And has the object of the present invention.

In addition, since the intra-oral scanning is performed in the state where the abutment is first fastened to the fixture, the implant procedure is simplified, and the coordinates of the abutment for joining the prosthesis in the state where the abutment is fastened to the fixture are not moved Another object of the present invention is to provide an accurate procedure.

In order to achieve the above object, the present invention as a technical idea comprises a fixture to be placed on the jawbone, an abutment to be inserted into the fixture, and a prosthesis attached to the abutment to form the external shape of the tooth The abutment includes an insertion portion inserted into the fixture and an assembly portion protruding into the oral cavity to which the prosthesis is attached. The abutment includes a hollow portion to be fastened to the assembly portion of the abutment to calculate a position value of the fixture and the abutment. The present invention is not limited to the above embodiments, and various modifications may be made without departing from the scope of the present invention.

According to the implant structure for extracting three-dimensional scan data for manufacturing the upper prosthesis of the present invention, irrespective of various implant fastening structures of various implant manufacturers, the accurate depth and direction of the abutment in the fixture , And the 3D scan data for the position of the center coordinate can be accurately measured. Therefore, it is possible to manufacture the prosthesis with little error by using the CAD cam system, thereby improving the quality.

In addition, since the error between the fixture, the abutment, the abutment and the prosthesis is hardly generated, it is possible to perform the precise procedure. In the prosthesis manufacturing process, The procedure time can be significantly shortened.

In addition, since the scan cap can be easily detached and attached to perform scanning, it is very convenient to use, and the in-mouth scanning can be performed at a low cost using the scan cap, which is an injection product, so that it is very economical.

1 is a perspective view showing a fastening structure of an implant structure according to a first embodiment of the present invention;
2 is an exploded perspective view showing an assembly structure of the scan cap according to the present invention.
Figure 3 is a perspective view of the prosthesis of the present invention
4 is a perspective view showing a fastening structure of an implant structure according to a second embodiment of the present invention.
Figure 5 is a perspective view of the scan cap of Figure 4;
Figure 6 is an exploded cross-sectional view of the scan cap of Figure 4;
Figure 7 is a cross-sectional view of the fastening structure of the implant structure of Figure 4;
Figure 8 is an assembled cross-sectional view of the abutment and scan cap of Figure 4;
Fig. 9 is a side view of the opening groove for confirming the insertion depth of the scan cap of the present invention
10 to 17 are a perspective view and a cross-sectional view according to still another embodiment of the scan cap of the present invention
18 and 19 are process drawings showing a method of manufacturing a prosthesis of the present invention

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Referring to FIG. 1, the implant structure of the present invention includes a fixture 100 placed on a jaw of a patient to form a tooth root of an artificial tooth, an abutment inserted and fixed in the fixture 100, A prosthesis 300 attached to the abutment 200 to form an external shape of the tooth and replacing the lost tooth of the patient, and a fixture 100 and an abutment And a scan cap 400 for extracting three-dimensional stereoscopic data of the object 200.

The fixture 100 has a hollow shape so that the abutment 200 can be inserted therein. The fixture 100 can be threaded on the outer circumferential surface of the fixture 100 to be placed on the jawbone.

The abutment 200 may include an insertion part 210 inserted into the fixture 100 and an assembly part 220 protruding into the oral cavity in a state of being fixed to the fixture 100 to which the prosthesis 300 is attached have.

The fixture 100 and the abutment 200 may be made of a metallic material such as titanium and the prosthesis 300 may be formed of various materials for forming the color and transparency of the artificial teeth similar to natural teeth.

The scan cap 400 is used to calculate an intraoral position value of the fixture 100 and the abutment 200. The scan cap 400 includes a hollow portion 420, The scan cap 400 is inserted into the assembly part 220 and the scan data is extracted from the surface of the scan cap 400 using the 3D scanner in a state where the scan cap 400 is inserted into the abutment 20.

The material of the scan cap 400 can extract scan data, ensure durability against impact and abrasion, and use PEEK (polyether ether ketone) to secure biocompatibility.

Eccentric portions 225 and 425 are formed to correspond to the assembly portion 220 of the abutment 200 and the hollow portion 420 of the scan cap 400 such that the fastening direction of the scan cap 400 is specified .

The eccentric portions 225 and 425 may be formed so that the outer circumferential surface of the assembly portion 220 is formed in a D-shaped shape with one side thereof inwardly or both sides thereof are formed inwardly. Various structures may be applied to allow the insertion direction of the scan cap 400 to be specified when assembling the electrode assembly 200.

At this time, the assembly part 200 and the hollow part 420 are preferably formed in a substantially cylindrical shape that gradually narrows toward the upper side so as to have a trapezoidal cross-section, The decomposition becomes easy.

The shape of the combination portion of the prosthesis 200 of the abutment 200 precisely matches the shape of the abutment combination portion in the prosthesis 300 so that the abutment 200 and the prosthesis 300 are in contact with each other, The bonding force between the abutment and the prosthesis can be increased as well as the bonding error can be minimized in the oral cavity due to manufacturing errors of the prosthesis.

In addition, since the prosthesis can be manufactured accurately regardless of the abutment type, the operator or the patient can select an implant structure suitable for his / her own considering economic and functional requirements.

Particularly, when a plurality of implants are simultaneously implanted, the assembly direction of the abutment 200 to the fixture 100 is not specified, so that the procedure is very easy. Even though the autonomy of the procedure is secured, .

At this time, the eccentric portion 425 formed in the hollow portion 420 of the scan cap 400 may be integrally formed on the inner circumference of the hollow portion 420, or may be formed as a separate portion after the side wall of the scan cap 400 is formed So that the eccentric portion 425 can be provided by fitting into the hollow portion 420 with the pin 427 of the pin 427 interposed therebetween.

11 and 15, it is preferable that the scan cap 400 is formed by injection molding so that the eccentric portion 425 is integrally formed when the scan cap 400 is formed. However, The scan cap 400 may be precision machined by milling as shown in FIGS. 6, 13, and 17, and then the side wall of the scan cap 400 may be punched to be cut The eccentric portion 425 can be provided by fusing the pin 427 with the hole.

In addition, the scan cap 400 and the pin 427 can be manufactured separately, so that it is possible to manufacture various types of abutments in conformity with the shapes of the abutments, and the compatibility for assembling each abutment can be improved.

The scan cap 400 acquires information on the assembly direction of the abutment 200 of the scan cap 400 and guides the guide surface 410 on the surface to specify the assembly direction of the prosthesis 300. [ .

Therefore, when designing the prosthesis based on the scan cap 400, the direction of the prosthesis 300 is specified, and then the prosthesis is designed.

In addition, if the outer circumference 405 of the scan cap 400 is made polygonal, the directionality of the data can be more accurately extracted when the three-dimensional scanning data using the scanner is extracted.

That is, the outer peripheral surface 405 may be formed in a rectangular shape as shown in FIGS. 5, 10, and 12, or may be formed into a polygonal columnar shape of various shapes such as a hexagonal outer peripheral surface 405 as shown in FIGS. 14 and 16 .

By forming the guide surface 410 on any one of the polygonal surfaces, it is possible to extract the more accurate intraoral oral 3D scan data according to the correlation between the directionality of the polygon and the guide surface 410.

In order to appropriately use the directionality of the polygon with respect to the guide surface 410 while minimizing the occurrence of shading on the guide surface 410 when extracting the three-dimensional scanning data in the polygonal formation of the outer circumferential surface 405, 405 are preferably formed in the form of hexagonal pillars.

7 and 8, the abutment 200 includes an inserting portion 210 and an assembling portion 220. The inserting portion 200 and the scan cap 400 are connected to each other, The scan cap 400 is formed with an inner end protrusion 430 for fixing the skirt portion of the abutment to the lower end of the hollow portion 420 can do.

At this time, when the scan cap 400 is assembled to the abutment 200, the inner end jaws 430 are closely attached to the outer circumferential surface of the skirt portion 230, and are tightly fused by the self-elastic force.

Accordingly, in a state where the scan cap 400 is assembled to the abutment 200, the scan cap does not flow, and is fixed in a fixed position at the coupled position, so that the scan data can be accurately extracted.

An opening groove 440 may be formed at the lower end of the scan cap 400 to check the insertion depth of the scan cap 400.

The depth of the scan cap 400 inserted into the abutment 200 can be checked by visually confirming the portion exposed through the open groove 440. Most preferably, It is preferable that the inner depth of the opening groove 440 is set so as to utilize the skirt portion 230 of the butt 200 as a scale.

The internal tuck 430 at the lower end of the scan cap 400 can be more easily opened by the self-elastic force when the tuck cap 400 is assembled to the skirt portion 230 of the abutment 200 by the partially cut open groove 440. [ And the air remaining in the hollow portion 420 of the scan cap 400 is smoothly escaped to the outside when the scan cap 400 is assembled into the abutment 200 through the opening groove 440. Therefore, The cap 400 can be more easily fastened and detached.

Hereinafter, a process for extracting three-dimensional scan data for manufacturing the upper prosthesis of the implant using the scan cap 400 and manufacturing a prosthesis based on the extracted data will be described in detail.

18 is a view illustrating a process of manufacturing a prosthesis using an implant structure for extracting a three-dimensional scan data for manufacturing an upper prosthesis of the present invention. The process comprises the steps of placing a fixture on a jawbone of a patient (S110) (S120) of inserting and fixing an abutment on the fixed fixture, a step (S130) of covering a scan cap of a material which can be scanned in the abutment placed in the fixture (S130), a step of inserting the scan cap A step (S140) of extracting three-dimensional scan data by performing an intraoral scanning using a three-dimensional scanner, and a step of providing scan data extracted in the step to a camcorder device to extract the positions of the fixture and abutment, (S150) designing and processing the prosthesis using the previously inputted library information.

The step S110 of placing the fixture on the patient's jawbone and the step S120 of inserting and fixing the abutment on the fixture placed on the jawbone are steps for setting the position to be treated for the artificial tooth in the oral cavity, 100 are inserted and the depth at which the abutment 200 is inserted with respect to the fixture 100 is set so that the fastening position of the prosthesis 300 is determined.

 In step S130, the position of the fixture 100 and the abutment 200 is set, and the position where the abutment 200 is set is extracted as three-dimensional scan data The scan cap 400 is inserted into the abutment 200 so that the surface of the scan cap 400 can be set as a reference point for three-dimensional scanning.

At this time, the scan cap 400 can be tightly fixed to the skirt portion 230 of the abutment 200 by the inner jaw 430 formed at the lower end of the scan cap 400, The depth of insertion of the scan cap 400 can be visually confirmed by using the open groove 440 formed at the lower end of the scan cap 400.

In the step S140 of extracting the three-dimensional scan data by performing the intraoral scanning using the three-dimensional scanner while the scan cap is overlapped on the abutment, the surface position of the scan cap 400 inserted in the abutment 200 As a step for extracting the scan data on the basis of the reference, a portable three-dimensional scanner of an oral type can be used.

The three-dimensional scan data can be obtained from the above steps. The three-dimensional scan data includes the height, width, dentition, occlusion state of the surrounding teeth, and the relationship between the jawbone of the patient and the surrounding teeth Accurate data can be obtained.

The step of providing the scan data extracted in the step to the CAD cam equipment to inversely calculate the positions of the fixture and the abutment, the inserted depth and the direction center coordinates, and designing and processing the prosthesis using the inputted library information When the scan cap 400 is mounted on the columnar assembly 220 exposed in the state where the abutment 200 is inserted into the fixture 100, The length of the abutment 200 can be determined based on the surface data of the fixture 100 and the positional relationship of the fixing hole of the fixture 100 and the inclination angle can be confirmed. Prostheses are made.

Library information, which is data for manufacturing the prosthesis 300 including the fixture 100 and the abutment 200, is stored in the CAD cam device and the outer shape of the prosthesis is designed based on the position value of the scan cap 400, And the restoration of the prosthesis is completed.

FIG. 19 is a view showing another process for manufacturing a prosthesis using an implant structure for extracting a three-dimensional scan data for manufacturing an upper prosthesis of the present invention. FIG. 19 shows a process of placing a fixture on a patient's jaw, A step S230 of inserting and fixing an abutment on the fixture placed on the fixture and drawing a tooth pattern S230, a step S230 of covering a scan cap of a scanable material to a model obtained by pulling the impression, (Step S240) of extracting three-dimensional scan data by scanning with a three-dimensional scanner in an overlapped state, and providing the scan data extracted in the step to the CAD cam equipment to determine a position and an inserted depth of the fixture and abutment And calculating and processing the prosthesis using the previously inputted library information (S250).

A step S210 of placing a fixture on the jawbone of the patient and a step S220 of inserting the abutment into the fixture placed on the jawbone and drawing the toothbrush to obtain an impression (S220) The depth at which the fixture 100 is inserted and the depth at which the abutment 200 is inserted with respect to the fixture 100 are set so that the fastening position of the prosthesis 300 is determined.

The step S230 of covering the scan cap of the scanable material with the model of the impression is performed in order to extract the set position of the fixture 100 and the abutment 200 in the state where the position of the fixture 100 and the abutment 200 is set, The scan cap 400 is inserted into the position of the abutment 200 so that the surface of the scan cap 400 can be set as a reference point for three-dimensional scanning.

In a step S140 of scanning the three-dimensional scan data by using the three-dimensional scanner while the scan cap is overlapped, the position of the scan cap 400 sandwiched by the abutment position of the model on which the tooth pattern is mounted is used as a reference As a step for extracting the scan data, a separate three-dimensional scanner device may be utilized, or a three-dimensional scanner incorporated in the CAD cam device may be used.

The three-dimensional scan data can be obtained from the above steps. The three-dimensional scan data includes the height, width, dentition, occlusion state of the surrounding teeth, and the relationship between the jawbone of the patient and the surrounding teeth Accurate data can be obtained.

The step of providing the scan data extracted in the step to the CAD cam equipment to inversely calculate the positions of the fixture and abutment, the inserted depth and the direction center coordinates, and designing and processing the prosthesis using the inputted library information (S250 When the scan cap 400 is mounted on the columnar assembly 220 exposed in the state where the abutment 200 is inserted into the fixture 100, The length of the abutment 200 can be determined based on the surface data of the fixture 100 and the positional relationship of the fixing hole of the fixture 100 and the inclination angle can be confirmed. Prostheses are made.

Library information, which is data for manufacturing the prosthesis 300 including the fixture 100 and the abutment 200, is stored in the CAD cam device and the outer shape of the prosthesis is designed based on the position value of the scan cap 400, And the restoration of the prosthesis is completed.

100: Fixtures
200: abutment 210: insertion part
220: assembly part 225: eccentric part
230: Skirt portion
300: prosthesis
400: scan cap 405: outer peripheral surface
410: guide surface 420: hollow
425: eccentric part 430:
440: opening groove

Claims (10)

A fixture (100) placed on the jawbone;
An abutment 200 inserted into the fixture 100;
A scan cap 400 fastened to an upper portion of the abutment 200 to calculate a position value of the fixture 100 and the abutment 200;
And,
The abutment 200 includes an insertion part 210 inserted into the fixture 100 and an assembling part 220 protruding into the oral cavity to which the prosthesis 300 is attached and an insertion part 210 and an assembling part 220 And a skirt portion 230 formed between the upper and lower skirt portions 230,
The scan cap 400 has a hollow portion 420 to be fastened to the assembly portion 220 of the abutment 200 and a skirt portion of the abutment is fastened to the lower end of the hollow portion 420, And the scan cap can be coupled to the upper portion of the abutment by forming the jaws 430 to extract the scan data. The three-dimensional scan data extraction implant structure for manufacturing the upper prosthesis of the implant. The scan cap assembly of claim 1, wherein the scan cap (400) has an eccentric part (225, 425) corresponding to the assembly part (220) of the abutment (200) and the hollow part (420) ) Is formed on the upper surface of the implant structure. 2. The method of claim 1, wherein the material of the scan cap (400)
Wherein the polyether ether ketone (PEEK) is used as the material for the extraction of the three-dimensional scan data for the manufacture of the upper prosthesis of the implant. The plasma display apparatus of claim 2, wherein the scan cap (400)
Wherein a guide surface (410) is formed on a surface of the scan cap (400) in order to obtain information on an assembling direction of the abutment (200) and to specify an assembling direction of the prosthesis (300) Three - dimensional scan data extraction implant structure for fabrication. The method of claim 4, wherein the scan cap (400)
Wherein an outer circumferential surface (405) is formed in a polygonal shape, and a guide surface (410) is formed on one of the polygonal surfaces. 6. The method according to claim 5, wherein the outer circumferential surface (405) is formed in a hexagonal shape so as to minimize shading of the guide surface (410) when extracting the three-dimensional scanning data. structure. delete The implant structure of claim 1, wherein the scan cap (400) is formed with an opening groove (440) for checking the insertion depth of the scan cap. delete delete

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