KR102304798B1 - Hourglass-shaped implant abutment and method for manufacturing crown using the same - Google Patents

Abstract

The present invention relates to a dental abutment and a method for manufacturing a crown using the same. In detail, the present invention relates to an hourglass-type abutment equipped with an hourglass-type pillar part and a method for manufacturing a crown using the same. The hourglass-type abutment comprises a pillar part having a thin center portion and an occlusal surface side to the gum side with a larger diameter like an hourglass, to make an artificial tooth (prosthesis/crown) to be covered on the pillar densely combined, thereby enabling firm attachment without using an adhesive and maintaining stable bonding force regardless of repetitive biting activity.

Description

HOURGLASS-SHAPED IMPLANT ABUTMENT AND METHOD FOR MANUFACTURING CROWN USING THE SAME

The present invention relates to a dental abutment and a method for manufacturing a crown using the same, and more particularly, by providing a column with a thin central portion and a larger diameter on the gingival and occlusal side, such as an hourglass, to the column Hourglass-type abutment with hourglass-shaped pillars that allows for tight attachment of the artificial teeth (prosthesis/crown) to be placed so that it can be firmly attached without using adhesive It relates to a ment and a method for manufacturing a crown using the same.

BACKGROUND ART In general, an implant is an artificial tooth structure formed through a dental treatment method to replace a missing or lost tooth. It replaces the function of natural teeth by inserting them into areas without bones and gums due to diseases, accidents or tumors, etc., and restores aesthetic beauty through restoration of artificial teeth.

These implants are basically a fixture to be placed in the alveolar bone, an abutment fixed to the fixture and supporting lateral or horizontal pressure in response to the occlusal force applied during mastication (abutment, abutment), and the abutment It includes artificial teeth (prosthetics/crowns) that restore aesthetic beauty similar to natural teeth by restoring the upper part of the tooth.

Briefly describing the implant procedure, the fixture is first placed on the alveolar bone of the recipient, and then the abutment is fixed. Then, it is restored by combining the artificial tooth on the upper part of the abutment. At this time, the artificial tooth is attached and fixed using an adhesive (cement or bond) harmless to the human body so that the artificial tooth is not easily separated from the abutment during mastication.

However, when adhesive is used to bond artificial teeth to the abutment, if the residual adhesive is not completely removed after the procedure, inflammation is induced around the gums and around the implant, and the bone around the screw thread of the fixture may be lost. In severe cases, there is a problem in that many side effects such as removing the implanted fixture and performing the procedure again are induced.

As a part of solving this problem, in prior documents such as Korean Patent No. 10-1445298, Korean Patent No. 10-1808599, Republic of Korea 10-2132353, and Korean Patent No. 10-1924802, the adhesive is not used. A non-adhesive implant structure in which artificial teeth are coupled to an abutment through screws (bolts) has been proposed.

Korean Patent No. 10-1445298 and Korean Patent No. 10-1808599, respectively, provide a structure for coupling the prosthesis to the abutment using a screw, thereby providing the advantage of not using an adhesive. Since the coupling force between the butts depends only on the screw, when a continuous external force is applied to the prosthesis, the coupling force of the screw is loosened, which may cause a problem in that the coupling force between the prosthesis and the abutment is lowered.

In Republic of Korea No. 10-2132353, the coupler is interposed between the prosthesis and the abutment, and in Korean Patent No. 10-1445298 and Republic of Korea Patent No. 10-1808599, the prosthesis rotates around the abutment as an axis, so the coupling force of the screw is loose. However, as in Korean Patent Registration No. 10-1445298 and Korean Patent Registration No. 10-1808599, the coupling force between the prosthesis and the abutment depends only on the screw, and the relationship between the prosthesis and the abutment can be solved. There may be limits to maximizing the bonding force.

In addition, Korean Patent Registration No. 10-1924802 proposes an implant structure in which a prosthesis is coupled to the upper portion of the abutment via a screw bolt, similar to the above-mentioned prior documents, but Korean Patent Registration No. 10-1445298 and the Republic of Korea Patent No. 10-1445298 As in Korean Patent Registration No. 10-1808599, since the coupling force between the prosthesis and the abutment depends only on the bolt, there may still be a limit to maximizing the coupling force between the prosthesis and the abutment.

In addition, in Republic of Korea No. 10-2132353, a coupler is additionally installed between the prosthesis and the abutment, unlike the existing implant structure, and in Korean Patent Registration No. 10-1924802, between the prosthesis and the abutment to prevent the flow of the prosthesis. Since the buffer member is additionally installed, the structure of the implant is somewhat complicated compared to the existing one, and this may cause a problem in that the implant operation is somewhat complicated and the operation time is also increased.

KR 10-1445298 B1, 2014. 09. 22. KR 10-1808599 B1, 2017. 12. 07. KR 10-2132353 B1, 2020. 07. 03. KR 10-1924802 B1, 2018. 11. 28.

Therefore, the present invention has been proposed to solve the problems of the prior art, and when the pillar part is manufactured in the shape of an hourglass, and the corresponding crown is placed on the pillar part of the hourglass shape, it is firmly and stably without using an adhesive. An object of the present invention is to provide an hourglass-type implant abutment that can be coupled and a method for manufacturing a crown using the same.

In addition, the present invention improves the bonding force between the artificial tooth and the abutment compared to the prior art by only processing the abutment without adding other components (coupler/buffering member, etc.) Another object of the present invention is to provide a non-adhesive abutment having an hourglass-shaped column that can reduce the treatment time by maintaining a stable bonding force and reducing the treatment time by easier treatment compared to the prior art, and a method for manufacturing a crown using the same.

The present invention according to one aspect for achieving the above object is a lower part comprising a coupling part fixed to a fixture to be implanted in the alveolar bone, a connection part formed on the top of the coupling part, and a box part formed on the top of the connection part; and an upper part that is detachably screwed to an upper portion of the box portion and constitutes a pillar portion having an hourglass-shaped structure together with the box portion in a state coupled to the box portion, wherein the pillar portion is a central portion from a lower end and an upper portion. It provides an hourglass-type abutment, characterized in that it has an hourglass-type structure in which the outer diameter becomes smaller as it goes, and an artificial tooth is covered.

Preferably, the upper part may be characterized in that a male screw protruding downwardly is formed in the center of the lower portion, and a female screw to which the male screw is screwed is formed in the upper center of the box portion corresponding to the male screw.

Preferably, the box part may be characterized in that a male screw protruding upward is formed in the upper center, and a female screw to which the male screw is screwed is formed in the lower center of the upper part corresponding to the male screw.

Preferably, the box portion has a female screw formed in the upper center, a coupling protrusion protruding upward from an upper end of the female screw is formed, and a lower center of the upper part corresponding to the female screw and the coupling protrusion is on the female screw. It may be characterized in that a male screw to be screwed is formed, and a coupling groove is formed to surround the male screw, so that the male and female coupling protrusions are coupled.

Preferably, the box portion has a coupling groove formed in the upper center, a male screw protruding upward from an upper portion of the coupling groove is formed, and the coupling groove and the coupling groove are formed in the lower center of the upper part corresponding to the male screw. It may be characterized in that a male-female coupling protrusion is formed in the groove, and a female screw is formed to surround the coupling protrusion, so that the male screw is screw-coupled.

In addition, the present invention according to another aspect for achieving the above object is a fixture to be implanted in the alveolar bone; the hourglass-shaped abutment coupled to the fixture; and artificial teeth coupled to the pillars of the hourglass-shaped abutment.

In addition, in another aspect of the present invention for achieving the above object, in the method for manufacturing a crown using the hourglass-type abutment, the box part of the lower part and the box part of the lower part in a state in which the lower part and the upper part are combined. forming a crown to cover the pillar portion made of the upper part; forming a hollow in the crown so that the upper part of the upper part is exposed; separating the upper part from the lower part; and separating the crown from the lower part to complete the production.

As described above, according to the hourglass-shaped abutment according to the present invention, an artificial tooth (prosthesis/crown) coupled with an artificial tooth (prosthesis/crown) to be covered with an hourglass-shaped pillar is provided and the coupling surface is tightly closed. When attaching teeth, it is possible to maintain strong and stable bonding force even with repeated mastication by firmly attaching and fixing artificial teeth without using separate adhesives and adding other components (couplers/buffering members, etc.).

1 is an assembled perspective view of an hourglass-type abutment according to Embodiment 1 of the present invention;
Figure 2 is an exploded perspective view of the hourglass-shaped abutment shown in Figure 1;
Fig. 3 is a cross-sectional view of the hourglass-shaped abutment shown in Fig. 1;
4 is a cross-sectional view illustrating a state in which the upper part shown in FIG. 3 is separated from the lower part;
5 is a cross-sectional view illustrating an implant including an hourglass-shaped abutment according to Embodiment 1 of the present invention.
6 to 9 are crown manufacturing process diagrams shown in FIG.
10 is an assembled perspective view of an hourglass-type abutment according to Embodiment 2 of the present invention;
11 is an exploded perspective view of the hourglass-shaped abutment shown in FIG. 10;
Fig. 12 is a cross-sectional view of the hourglass-shaped abutment shown in Fig. 10;
13 is a cross-sectional view illustrating a state in which the upper part shown in FIG. 12 is separated from the lower part;
14 is a cross-sectional view illustrating an implant including an hourglass-shaped abutment according to a second embodiment of the present invention.
15 is an assembled perspective view of an hourglass-type abutment according to a third embodiment of the present invention;
Fig. 16 is an exploded perspective view of the hourglass-shaped abutment shown in Fig. 15;
Fig. 17 is a cross-sectional view of the hourglass-shaped abutment shown in Fig. 15;
18 is a cross-sectional view illustrating a state in which the upper part shown in FIG. 17 is separated from the lower part;
19 is a cross-sectional view illustrating an implant including an hourglass-shaped abutment according to a third embodiment of the present invention.
20 is an assembled perspective view of an hourglass-type abutment according to a fourth embodiment of the present invention;
Fig. 21 is an exploded perspective view of the hourglass-shaped abutment shown in Fig. 20;
Fig. 22 is a cross-sectional view of the hourglass-shaped abutment shown in Fig. 20;
23 is a cross-sectional view illustrating a state in which the upper part shown in FIG. 22 is separated from the lower part;
24 is a cross-sectional view showing an implant including an hourglass-shaped abutment according to a fourth embodiment of the present invention.
25 is a cross-sectional view showing an hourglass-shaped abutment according to a fifth embodiment of the present invention by cutting it up and down.
26 is a cross-sectional view illustrating a state in which a crown is manufactured on the hourglass-shaped abutment shown in FIG. 25;

Advantages and features of the present invention and methods of 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 will be implemented in various different forms.

In the present specification, the present embodiment is provided so that the disclosure of the present invention is complete, and to fully inform those of ordinary skill in the art to which the present invention pertains to the scope of the present invention. And the invention is only defined by the scope of the claims. Thus, in some embodiments, well-known components, well-known operations, and well-known techniques have not been specifically described in order to avoid obscuring the present invention.

Also, like reference numerals refer to like elements throughout the specification. In addition, the terms used (mentioned) in this specification are for the purpose of describing the embodiments and are not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. In addition, elements and operations referred to as 'include (or include)' do not exclude the presence or addition of one or more other elements and operations.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. Also, terms defined in commonly used dictionary are not to be interpreted ideally or excessively unless defined.

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

1 is an assembled perspective view of an hourglass-type abutment according to Embodiment 1 of the present invention, FIG. 2 is an exploded perspective view of the hourglass-type abutment shown in FIG. 1, and FIG. 3 is the sand shown in FIG. It is a cross-sectional view showing the watch-type abutment cut up and down, and FIG. 4 is a cross-sectional view showing a state in which the upper part of the column shown in FIG. 3 is separated from the lower part.

1 to 4, the hourglass-shaped abutment 10 according to the first embodiment of the present invention has a lower part 11 having a lower part coupled and fixed to a fixture 2 (refer to FIG. 5), and a lower part It includes an upper part 12 detachably coupled to the upper portion of the (11), for example, by a screw coupling method.

The lower part 11 is integrally formed on the upper part of the coupling part 111 and the coupling part 111 which is inserted and fixed into the interior of the fixture 2, as shown in FIGS. 1 and 2, and the outer diameter expands toward the top. It includes a connecting portion 112 and a box portion 113 integrally formed on the upper portion of the connecting portion 112 .

The coupling part 111 is fixed in such a way that a hollow 111a is formed therein, as shown in FIG. 5 , and is screwed to the inner circumferential surface of the fixture 2 through a separate fixing screw 3 , or the lower part of the coupling part 111 . A set screw may be integrally formed on the (see FIG. 10 ) to be screwed to the fixture (2).

As shown in FIG. 5 , the connection part 112 is the coupling part 111 so that the fixing screw 3 is inserted through the inside when the coupling part 111 is fastened to the fixture 2 by the fixing screw 3 , as in FIG. 5 . It may be formed in a cylindrical structure in which the hollow 112a is formed therein, and may be formed in a structure integrally extended from the upper portion of the coupling portion 111 through machining (eg, CAM processing).

And, as shown in FIG. 3 , when the abutment 10 has a two-piece structure (structure fixed by a fixing screw 3 ), a lower part 11 is formed at the boundary between the coupling part 111 and the connection part 112 . A stepped portion 111b is formed in which the head portion of the set screw 3 for fixing the to the fixture 2 is engaged in the downward direction (fixture 2 coupling direction). To this end, the inner diameter of the hollow 111a formed in the coupling portion 111 may be formed to be smaller than the inner diameter of the hollow 112a of the connecting portion 112 .

The box portion 113 may be formed in a size smaller than the outer diameter of the lower end than the outer diameter of the upper end of the connecting portion (112). Through this, a stepped portion 112b having a predetermined width is formed on the interface between the connection portion 112 and the box portion 113 , that is, on the upper surface of the connection portion 112 .

This stepped portion 112b increases the bonding area by the size (width) when the artificial teeth 4 are coupled, thereby improving the bonding force, and allowing the crown located here to be smoothly transferred to the connection portion 112 to reduce the feeling of foreign body. Increase the fracture resistance by increasing the thickness of the crown.

In addition, two or more box grooves 113a formed in the box portion 113 may be formed at regular intervals on the outer surface, preferably about 3 to 4 pieces. The box groove 113a has a structure recessed from the outer surface of the box portion 113 to the center of the box portion 113, and when the artificial teeth 4 are coupled to cover the box portion 113, within a single area. It may be formed to have left and right side surfaces and a lower surface in order to maximize the contact area with the artificial teeth (4). In this case, the upper surface may be opened.

The box portion 113 has an upper part 12 coupled thereto. That is, the upper part 12 is screwed to the female screw 113b formed in the center of the box portion 113 with a male screw 12a protruding from the center of the lower portion.

Through the combination of the box portion 113 and the upper part 12, the pillar portion of the hourglass-shaped abutment 10 according to the first embodiment of the present invention is completed. The pillar portion is a portion for accommodating the artificial tooth 4, and the overall shape is made of an hourglass-like structure in order to increase the contact area with the inner surface of the artificial tooth 4 to improve the bonding force. That is, the pillar portion has a structure in which the outer diameters of the lower end and the upper end are relatively large, and the outer diameter decreases toward the central portion.

2 and 4, the upper part 12 may have a structure in which the outer diameter increases from the lower end to the upper end. And, a male screw (12a) is formed to protrude in the lower center, and is detachably screwed to the female screw (113b) formed in the upper center of the box part (113).

A tool groove 12b is formed in the upper center of the upper part 12 for screwing the upper part 12 to the box part 113 using a tool such as a screwdriver. The shape is not limited to straight, cross, or polygonal (hexagonal, etc.).

5 is a cross-sectional view illustrating an implant including an hourglass-shaped abutment according to Embodiment 1 of the present invention.

Referring to FIG. 5 , the implant 100 according to the present invention includes a fixture 2 to be implanted in the alveolar bone, and an hourglass-type abutment 10 that is coupled and fixed to the fixture 2 via a set screw 3 . and an artificial tooth (prosthesis/crown) 4 that is coupled while covering the pillar portion.

6 to 9 are manufacturing process diagrams sequentially illustrating the process of manufacturing the crown shown in FIG.

Referring to FIG. 6 , as shown in FIGS. 1 to 4 , a crown 4a is formed so as to cover the pillar part in a state in which the manufactured lower part 11 and the upper part 12 are coupled to each other. In this case, the crown 4a may be manufactured by casting after waxing in the case of manufacturing by waxing, and may be manufactured by camming in the case of manufacturing through digital operation.

Thereafter, a hollow is formed by removing the upper part of the crown 4a so that the upper part of the upper part 12 is exposed.

Thereafter, the hollowness of the crown 4a is optimized through a process of attaching and detaching the upper part 12 to the lower part 11 (separation and assembly). At this time, the diameter of the portion 4b to be filled with a filling material such as resin later in the hollow should be larger than the diameter of the upper part 12 to facilitate the entry of the upper part 12 .

After that, the upper part 12 is separated from the lower part 1 to complete the desired shape of the crown.

An implant operation is performed at the dentist using the thus-fabricated crown 4a.

For example, as shown in FIG. 7 , the crown 4a manufactured in FIG. 6 is placed on the box portion 113 of the lower part 11 in a state in which the upper part 12 is removed and only the lower part 11 is present. poetic

Thereafter, as shown in FIG. 8 , the upper part 12 is introduced through the open hollow of the crown 4a and then screwed to the female screw 113b of the box part 113 using the male screw 12a and fixed.

Thereafter, as shown in FIG. 9 , the implant operation is completed by filling the open hollow of the crown 4a.

The effect of the implant according to Example 1 of the present invention having such a configuration will be described.

As shown in FIG. 5 , in the implant 100 according to the embodiment of the present invention, the pillar portion of the hourglass-shaped abutment 10 is combined with the box portion 113 of the lower part 11 and the upper part 12 through It is formed in an hourglass-like structure. When the artificial tooth 4 after the pore work is finished is placed on the box part 113 of the lower part 11, and the upper part 12 is fastened to the box part 113, the artificial tooth 4 is a concave part inside the column part. Not only can he be caught in the trap, he cannot move, nor does he fall off. That is, there is no problem that the artificial tooth 4 falls off from the column part even without using an adhesive.

10 is an assembled perspective view of the hourglass-type abutment according to Embodiment 2 of the present invention, FIG. 11 is an exploded perspective view of the hourglass-type abutment shown in FIG. 10, and FIG. 12 is the sand shown in FIG. It is a cross-sectional view showing the watch-type abutment cut up and down, and FIG. 13 is a cross-sectional view showing a state in which the upper part shown in FIG. 12 is separated from the lower part.

10 to 13 , the hourglass-type abutment 20 according to the second embodiment of the present invention has a lower part 21 coupled and fixed to the fixture 2 as in the first embodiment, and a lower part ( 21) includes an upper part 22 that is detachably coupled to the upper portion of the screw coupling method.

The lower part 11 includes a coupling part 211 in which a male screw 211a is formed at the lower end to be screwed to the fixture 2 , a connection part 212 integrally formed on the upper part of the coupling part 211 , and a connection part 212 . ) includes a box portion 213 formed on the upper portion.

The upper part 22 is located on the upper part of the lower part 21 and is detachably screwed to the box part 213 . And, as in the first embodiment, it is combined with the box portion 213 to constitute the pillar portion of the hourglass-shaped abutment 20 . At this time, the coupling structure between the box portion 213 and the upper part 22 is various.

12 and 13, the box portion 213 is formed with a box groove 213a, as in the first embodiment, and a male screw 213b is formed in the upper center. In addition, a female screw 22a is formed in the lower center of the upper part 22 corresponding to the male screw 213b of the box portion 213 .

In addition, the upper part 22 has a tool groove 22b formed in the upper center thereof as shown in FIG. 11 .

14 is a cross-sectional view illustrating an implant including an hourglass-shaped abutment according to Embodiment 2 of the present invention.

Referring to FIG. 14 , in the implant 200 according to the present invention, an hourglass-shaped abutment 20 is fixed to the fixture 2 via a male screw 211a to the coupling portion 211 of the lower part 21 . and the upper part 22 is detachably screwed to the male screw 213b formed in the box portion 213 through the female screw 22a to form the pillar portion of the abutment 20 having an hourglass-shaped structure.

15 is an assembled perspective view of the hourglass type abutment according to the third embodiment of the present invention, FIG. 16 is an exploded perspective view of the hourglass type abutment shown in FIG. 15, and FIG. 17 is the sand shown in FIG. It is a cross-sectional view showing the watch-type abutment cut up and down, and FIG. 18 is a cross-sectional view showing a state in which the upper part shown in FIG. 17 is separated from the lower part.

15 to 18 , the hourglass-shaped abutment 30 according to the third embodiment of the present invention includes a lower part 31 and an upper part 32 as in the first and second embodiments. .

The lower part 31 is integrally formed with the coupling part 311 in which a male screw 311a is formed at the lower end in order to be screwed to the fixture 2, and the coupling part 311, as in the first and second embodiments. It includes the formed connection part 312 and the box part 313 formed on the top of the connection part 312 .

The upper part 32 is detachably screwed to the box part 313 of the lower part 31 .

17 and 18, the box portion 313 has a box groove 313a formed therein, a female screw 313b having a screw thread formed in the upper center is formed, and protruding upward from the upper end of the female screw 313b. A coupling protrusion 313c is formed.

And, in the lower center of the upper part 32 corresponding to the box portion 313, a male screw 32a screwed to the female screw 313b of the box portion 313 is formed, and is recessed to surround the male screw 32a. A coupling groove (32b) is formed to which the coupling protrusion (313c) is coupled to the male and female. In addition, a tool groove 32c is formed in the upper center of the upper part 42 .

19 is a cross-sectional view illustrating an implant including an hourglass-shaped abutment according to a third embodiment of the present invention.

Referring to FIG. 19 , in the implant 300 according to the present invention, the hourglass-shaped abutment 30 is fixed to the fixture 2 through the male screw 311a formed in the coupling part 311 of the lower part 31 . The box part 313 and the upper part 32 of the lower part 31 are screwed between the female screw 313b and the male screw 32a, and the male and female coupling between the coupling protrusion 313c and the coupling groove 32b. are combined

20 is an assembled perspective view of the hourglass type abutment according to the fourth embodiment of the present invention, FIG. 21 is an exploded perspective view of the hourglass type abutment shown in FIG. 20, and FIG. 22 is the sand shown in FIG. It is a cross-sectional view showing the watch-type abutment cut up and down, and FIG. 23 is a cross-sectional view showing a state in which the upper part shown in FIG. 22 is separated from the lower part.

Referring to FIGS. 20 to 23 , the hourglass-shaped abutment 40 according to the fourth embodiment of the present invention includes a lower part 41 and an upper part 42 as in the above-described embodiments.

The lower part 41 includes a coupling part 411 having a male screw 411a formed at the lower end to be screwed to the fixture 2, a connection part 412 integrally formed on the upper part of the coupling part 411, and a connection part 412 ) includes a box portion 413 formed on the top.

The upper part 42 is detachably screwed to the box portion 413 of the lower part 41 .

21, 22 and 23, the box portion 413 has a plurality of box grooves 413a formed along the circumferential surface, and a coupling groove 413b is formed in the upper center, and a coupling groove 413b. ), a male screw 413c protruding upward is formed on the upper part.

And, in the lower center of the upper part 42 corresponding to the box portion 413, a coupling protrusion 42a that is male and female coupled to the coupling groove 413b of the box 413 is formed, and the coupling protrusion 42a is formed. A screw thread is formed on the inner circumferential surface to surround, and a female screw 42b to which a male screw 413c is screwed is formed. In addition, a tool groove 42c is formed in the upper center of the upper part 42 .

24 is a cross-sectional view illustrating an implant including an hourglass-shaped abutment according to a fourth embodiment of the present invention.

Referring to FIG. 24 , in the implant 400 according to the present invention, the hourglass-shaped abutment 40 is fixed to the fixture 2 through the male screw 411a formed in the coupling portion 411 of the lower part 41 . The upper part 42 and the box portion 413 of the lower part 41 are coupled by a male and female coupling between the coupling protrusion 42a and the coupling groove 413b and a screw coupling between the male screw 413c and the female screw 42b. do.

25 is a cross-sectional view showing the hourglass-type abutment according to the fifth embodiment of the present invention by cutting it up and down, and FIG. It is a cross section.

25 and 26 , the hourglass-type abutment 50 according to the fifth embodiment of the present invention provides a method of reducing the hole size of the occlusal surface of the crown in the hourglass-type structure.

As shown in FIG. 25 , if the diameter of the upper part 52 is narrowed at the portion where the lower part 51 and the upper part 52 are divided (part 'A'), the diameter of the occlusal side of the crown can be reduced. That is, by forming the diameter of the upper part 52 smaller at the boundary between the lower part 51 and the upper part 52 , the diameter d of the hole h generated in the occlusal surface of the crown can also be reduced. In FIG. 26, 'B' denotes a crown when the occlusal surface is wide, and 'C' denotes a crown when the occlusal surface is narrow.

25 and 26, '511' denotes a coupling part, '512' denotes a connection part, and '513' denotes a box part.

As described above, the technical idea of the present invention has been specifically described in the preferred embodiment, but the preferred embodiment is for the purpose of explanation and not for limitation. As such, those of ordinary skill in the art will be able to understand that various embodiments are possible through combination of embodiments of the present invention within the scope of the technical spirit of the present invention.

100, 200, 300, 400: implant
2: Fixture
3: set screw
4: Artificial teeth (prosthesis/crown)
4a: Crown
10, 20, 30, 40, 50: abutment
11, 21, 31, 41, 51: lower part
12, 22, 32, 42, 52: upper part
111, 211, 311, 411, 511: coupling part
112, 212, 312, 412, 512: connection part
113, 213, 313, 413, 513: box part
111b, 112b: step part
111a, 112a, 121b: hollow
113a, 213a, 313a, 413a: box groove
12a, 32a, 122a, 211a, 213b, 311a, 411a, 413b: male thread
22a, 42b, 113b, 313b: female thread
42a, 313c: linking process
32b, 413b: coupling groove
12b, 22b, 32c, 42c: tool groove

Claims (7)

A lower part comprising a coupling part fixed to the fixture to be implanted in the alveolar bone, a connection part formed on the top of the coupling part, and a box part formed on the top of the connection part; and
an upper part that is detachably screwed to an upper portion of the box portion and constitutes a pillar portion having an hourglass-shaped structure together with the box portion in a state coupled to the box portion; including,
The pillar portion is made of an hourglass-shaped structure in which the outer diameter becomes smaller from the lower end and the upper end to the central portion, and the artificial teeth are covered,
Hourglass type, characterized in that a male screw is formed on one of the lower center of the upper part and the upper center of the box part, and a female screw is formed on the other side to be screwed together, and the artificial teeth are fixed by the screw coupling. abutment.
The method of claim 1,
The upper part is an hourglass-type abutment, characterized in that a male screw protruding downwardly is formed in the center of the lower part, and a female screw to which the male screw is screwed is formed in the upper center of the box part corresponding to the male screw.
The method of claim 1,
An hourglass-type abutment, characterized in that the box part has a male screw protruding upward in the center of the upper part, and a female screw to which the male screw is screwed is formed in the lower center of the upper part corresponding to the male screw.
The method of claim 1,
The box portion has a female screw formed in the upper center, a coupling protrusion protruding upward from the upper end of the female screw is formed, and a lower center of the upper part corresponding to the female screw and the coupling protrusion is screwed to the female screw. An hourglass type abutment, characterized in that a male screw is formed, and a coupling groove is formed to surround the male screw, and the male and female coupling protrusions are coupled.
The method of claim 1,
The box portion has a coupling groove formed in the upper center, a male screw protruding upward from an upper portion of the coupling groove is formed, and a male and female screw in the coupling groove in the lower center of the upper part corresponding to the coupling groove and the male screw. An hourglass-type abutment, characterized in that a coupling protrusion to be coupled is formed, and a female screw is formed to surround the coupling protrusion, and the male screw is screwed together.
a fixture to be placed on the alveolar bone;
The hourglass-shaped abutment of any one of claims 1-5 coupled to the fixture; and
artificial teeth coupled to the pillars of the hourglass-shaped abutment;
Implant comprising a.
The method for manufacturing a crown using the hourglass-shaped abutment according to any one of claims 1 to 5, comprising:
forming a crown so as to cover the column part including the box part of the lower part and the upper part in a state in which the lower part and the upper part are combined;
forming a hollow in the crown so that the upper part of the upper part is exposed;
separating the upper part from the lower part; and
Completing the manufacturing by separating the crown from the lower part;
Crown manufacturing method comprising a.

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