KR20070112075A - Separable abutment for dental implant and method for making dental prosthesis using the same - Google Patents

Abstract

A separable abutment of a dental implant and a dental prosthesis manufacturing method using the same are provided to facilitate the production of precise dental prostheses by integrally forming an upper member of the abutment during making the dental prostheses and to control detachment properly by precisely combining the dental prosthesis integrated with the upper member, to a lower member. A separable abutment(30e) fixed to a fixture implanted in the alveolar bone to hold a dental prosthesis is composed of: a lower member(60e) settled to the fixture; an upper member(70e) fixed to the dental prosthesis; and a detachment structure for separably combining the upper and lower members. The detachment structure has a snap fastener comprising a female button installed at one of the upper and lower members and a male button(79e) installed on the other.

Description

Separable abutment of dental implant and method of manufacturing dental prosthesis using same {SEPARABLE ABUTMENT FOR DENTAL IMPLANT AND METHOD FOR MAKING DENTAL PROSTHESIS USING THE SAME}

1 (a) and (b) are cross-sectional views showing the structure of a conventional screw retained implant.

Figure 2 is a cross-sectional view showing the structure of a conventional cement holding implant.

Figure 3 is a cross-sectional view showing a state in which the implant using the abutment according to an embodiment of the present invention.

4 is an exploded perspective view of the abutment shown in FIG.

5 is a cross-sectional view showing a state in which the dental prosthesis is separated from the implant shown in FIG.

Figure 6 is a cross-sectional view showing a state in which the implant using the abutment according to another embodiment of the present invention.

7 is a cross-sectional view showing a state in which an implant using an abutment according to another embodiment of the present invention is performed.

8 is an exploded perspective view of the abutment shown in FIG. 7.

<Description of the symbols for the main parts of the drawings>

10: implant 20: fixture

30: abutment 40: dental prosthesis

60: lower member 70: upper member

80: coupling ring

The present invention relates to dental implants and, more particularly, to abutments of implants.

The dental implant is an artificial tooth structure formed by planting artificial tooth roots at a site where a tooth is lost and attaching them to the alveolar bone, and fixing dental prostheses to the bonded artificial tooth roots. In general, an implant is composed of a fixture, an abutment fixed to the fixture, and a dental prosthesis fixed to the abutment. Conventional implants are divided into a screw retaining type and a cement retaining type according to the fixing method of the dental prosthesis.

The screw-held implant is a manner in which the dental prosthesis is fixed by a screw, as shown in FIG. 1. The implant 10a shown in FIG. 1 includes a fixture 20a, a UCLA abutment 30a, and a dental prosthesis 40a. The fixture 20a is placed in the alveolar bone 90a, and the UCLA abutment 30a is integrated with the dental prosthesis 40a and fixed to the fixture 20a by a fixing screw 50a.

Figure 2 shows the structure of a conventional cement holding implant. Referring to Figure 2, the implant 10c includes a fixture 20c, an abutment 30c, and a dental prosthesis 40c. The abutment 30c is fixed to the fixture 20c implanted in the alveolar bone 90c by the fixing screw 50c. Insert the dental prosthesis 40c into the fixed abutment 30c and fix it by bonding using the dental cement 100c.

The screw-held implant shown in FIG. 1 can be removed and remounted relatively easily when needed, but the dental prosthesis must be processed very precisely, which makes it difficult to precisely manufacture and takes a lot of time and money. There is a problem that a phenomenon may occur. In addition, the cement-maintained implant shown in FIG. 2 can easily achieve a passive fit as compared to the screw-maintaining type, so that the procedure is relatively easy, but there is a problem that it is not easy to control the detachment. In other words, it may fall too easily or may not be too separated.

The present invention is to solve the problems of the prior art as described above, it is an object of the present invention to provide an abutment of the dental implant to make it easier to make a precise dental implant prosthesis and to facilitate management. Another object of the present invention is to provide an abutment of a dental implant that facilitates the removal of the dental implant prosthesis. Still another object of the present invention is to provide an abutment for a dental implant that can easily eliminate the use of cement while making an implant prosthesis close to the cement type by easily manufacturing a precision prosthesis.

According to one aspect of the invention, the abutment for fixing the fixture implanted in the alveolar bone and to maintain the dental prosthesis, a lower member fixed to the fixture, an upper member fixed to the dental prosthesis, the upper A detachable abutment of a dental implant is provided that includes a detachable structure for detachably coupling a member and a lower member to each other.

The detachable structure may include a snap fastener having a female button provided on one of the upper member and the lower member, and a means weight provided on the other.

As the detachable structure, a locking groove provided in the upper member and the lower member and a coupling ring fitted into the locking groove may be coupled to the upper member and the lower member by the elasticity of the coupling ring.

As the detachable structure, the upper member and the lower member are provided with an inclined head portion to be narrowed toward the end when provided in the lower member, and a receiving space provided in the upper member and accommodating the head portion. Coupling can be maintained by negative pressure.

The abutment may be provided with at least two detachable structures of the three detachable structures.

As the detachable structure, any one of the upper member and the lower member may be provided with a protrusion, and the other member may be provided with a locking groove into which the protrusion may be fitted.

According to another aspect of the invention, the abutment is fixed to the fixture implanted in the alveolar bone, the abutment for holding the implant prosthesis, the lower member fixed to the fixture, the upper member fixed to the implant prosthesis, and A method of manufacturing an implant prosthesis using a detachable abutment of a dental implant having a detachable structure for detachably coupling a lower member and an upper member, wherein the upper member separated from the lower member of the abutment is a dental implant. Provided is a method for manufacturing a dental implant prosthesis comprising the step of integrally forming the prosthesis during casting.

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

Referring to FIG. 3, the implant 10 is fixed to the alveolar bone 90 with a fixture 20, a dental prosthesis 40, and a fixture 20 fixed downward to the fixture 20 and a dental prosthesis 40 upward. An abutment 30 is fixed to it. The internal threaded portion 22 is formed inside the fixture 20. The male screw portion 68 to be described later of the abutment 30 is coupled to the female screw portion 22. The dental implant prosthesis 40 is fixed to the upper member 70 described later of the abutment 30.

3 and 4, the abutment 30 includes a lower member 60 fixed to the fixture 20 and an upper member 70 fixed to the dental prosthesis 40. The lower member 60 and the upper member 70 are coupled by a detachable structure formed to enable separation and coupling. The lower member 60 is generally a columnar shape extending up and down, and includes a head portion 64, an extension portion 62, and an extension portion 66, which are sequentially formed from above. The head 64 is generally in the shape of a truncated cone, inclined so that the outer surface 65 becomes wider toward the bottom, that is, narrower toward the upper end. The outer surface 65 of the head 64 is provided with an annular fixing groove 651. The coupling ring 80 is fixed to the fixing groove 651 so as not to be pulled out. The coupling ring 80 may be made of rubber (plastic) or metal. The radially outer side of the coupling ring 80 fitted into the fixing groove 651 protrudes from the outer surface 65 of the head 64 to form the protrusion 82. A locking groove 78 to be described later formed in the upper member 70 is fitted to the protrusion 82 to couple the lower member 60 and the upper member 70 to each other. Extension 62 is formed to extend further outward than the head (64). The extension 66 extends downwardly from the extension 62 and a male screw portion 68 is formed. The male screw portion 68 of the extension portion 66 is coupled to the female screw portion 22 of the fixture 20 placed in the alveolar bone 90 so that the body 60 of the abutment 30 is fixed to the fixture 20. Is fixed to.

The upper member 70 includes an upper wall 73, a side wall 72 extending downward from the upper wall 73, and a flange portion 74 extending outward from the lower end of the side wall 72. The accommodating space 79 is formed by the side wall 72 and the upper wall 73, and the head 64 of the lower member 60 is accommodated in the accommodating space 79. The inner surface 76 of the side wall 72 is provided with an annular engaging groove 78. The protrusion 82 of the coupling ring 80 is inserted into the locking groove 78 so that the upper member 70 to which the dental prosthesis 40 is fixed is detachably coupled to the lower member 60. The dental prosthesis 40 and the upper member 70 may be integrally formed by appropriate means (eg, the method used for UCLA abutment) in the casting of the dental prosthesis 40. It will be understood by those skilled in the art that the coupling force of the lower member 60 and the upper member 70 can be properly adjusted according to the shape of the coupling ring 80 and the locking groove 78. Preferably, the upper member 70 is made of titanium, but the present invention is not limited thereto.

As shown in FIG. 4, in the state where the upper member 70 and the lower member 60 are coupled, the dental prosthesis 40 is well maintained by the action of the coupling ring 80. In the state shown in FIG. 4, when a force greater than the coupling force between the upper member 70 and the lower member 60 is applied to the dental prosthesis 40, the upper member 70 and the lower member 60 of the abutment 30 are removed. ) Is disengaged and the dental prosthesis 40 is separated with the upper member 70 and the state is shown in FIG. In addition, as shown in FIG. 5, the dental prosthesis 40 may be coupled to the lower member 60 by applying an appropriate force in a state where the dental prosthesis 40 is separated. The upper member 70 and the lower member 60 are precisely coupled so that foreign matter does not penetrate well between the two members 60 and 70. Thereby, the use of the cement for adhesion can be excluded.

In the above embodiment, the fixing groove is provided in the lower member 60, and the locking groove is described in the upper member 70, but on the contrary, the fixing groove is provided in the upper member 70 and the locking groove lower member 70 May be provided. In addition, it will be understood by those skilled in the art that the desired coupling force may be generated by friction with the coupling ring without the locking groove. In the above embodiment, the coupling ring is described as one, but the present invention is not limited thereto. A plurality of coupling rings may be provided, and thus a plurality of locking grooves may be provided. In addition, in the above embodiment, the abutment has been described as being integrally formed with a screw for fixing the abutment to the fixture, but the present invention is not limited thereto. It will be understood by those skilled in the art that the detachable abutment according to the present invention can be applied to a form without a screw, that is, a form in which a fixed screw is provided separately.

6 shows another embodiment of the present invention. Referring to FIG. 6, the lower member 60d and the upper member 70d of the abutment 30d are held in contact by frictional forces on surfaces in contact with each other. In addition, the negative pressure acting between the two lower members 60d and the upper member 70d acts as a coupling force. That is, the lower member 60d and the upper member 70d are coupled in a tight fit manner. It will be understood by those skilled in the art that the upper member 70d can be separated from the lower member 60d by a suitable external force and can be combined again. Other configurations and operations are the same as the embodiment shown in Figs. 3 to 5, so a detailed description thereof will be omitted.

7 and 8, the lower member 60e of the abutment 30e is fixed to the fixture by the fixing screw 50e. The upper portion of the abutment 60e is provided with a hollow pillar portion 64e extending upward. The end of the pillar portion 64e is collapsed to narrow the inner diameter, and is divided by a plurality of slits 69e to form a female button 67e of a snap fastener. A protrusion 79e protruding from the upper wall 73e is provided inside the upper member 70e. The ends of the projections 79e extend to form the means weight of the snap fasteners. The female button 67e of the lower member 60e and the means weight 79e of the upper member 70e form a snap fastener. The configuration of the snap fastener facilitates the detachment of the upper member 70e and the lower member 60e. A separating groove 78e is provided at the end of the upper member 70e that is in contact with the lower member 60e. Through the grooves 78e, the upper member 60e and the lower member 70e can be more easily separated using a separation tool such as a screwdriver.

The combination of the upper member and the lower member of the abutment according to the present invention is not limited only to the method disclosed through the above three embodiments. It will be understood by those skilled in the art that the methods of the three embodiments can be used in combination. In addition, if the two members are coupled to be detachable by a suitable force will be within the scope of the present invention.

In the embodiment shown in Figures 4 to 8, although not shown in the drawings, the abutment has a rotation preventing structure that prevents relative rotation between the upper member and the lower member. The anti-rotation structure may be formed of, for example, a groove and a configuration such as a protrusion that is caught in the groove to prevent rotation.

In the drawings, the rotation preventing structure for preventing the abutment from rotating with respect to the fixture is described as being applied to an external method formed outside the fixture, but the present invention is not limited thereto. It will be understood by those skilled in the art that the detachable abutment according to the present invention can also be applied to an internal manner formed inside the fixture.

It will be appreciated by those skilled in the art that the detachable abutment according to the present invention can be applied to any type of dental implant using the abutment in addition to the dental implant of the type shown in the figures.

According to the configuration of the present invention can achieve all the objects of the present invention described above. Specifically, the abutment includes an upper member and a lower member coupled by a detachable structure that can be detached and coupled, so that the dental prosthesis can be easily separated and recombined, which takes less time and is managed after the procedure and procedure. Is very easy. In addition, since the upper member is integrally formed when the dental prosthesis is manufactured, it is easier to manufacture the precise prosthesis.

Since the implant prosthesis integral to the upper member is already made to be precisely coupled to the lower member, the detachment is appropriately controlled. In addition, by providing a detachable abutment that precisely couples, the construction method is similar to the cement retaining type but is more hygienic because it can eliminate the use of cement. Sometimes biocompatible fats and oils can be used instead of cement.

Although the present invention has been described with reference to the above embodiments, the present invention is not limited thereto. Those skilled in the art will appreciate that modifications and variations can be made without departing from the spirit and scope of the present invention and that such modifications and variations also fall within the present invention.

Claims (7)

As an abutment for fixing a dental implant placed in the alveolar bone and holding a dental prosthesis, A lower member fixed to the fixture; An upper member fixed to the dental prosthesis; A detachable abutment of a dental implant comprising a detachable structure for detachably coupling the upper member and the lower member. The abutment according to claim 1, wherein the detachable structure of the dental implant includes, as the detachable structure, a snap fastener having a female button provided on one of the upper member and the lower member and a means weight provided on the other. Butt. The abutment according to claim 1, wherein the detachable structure includes a locking groove provided in the upper member and the lower member, and a coupling ring fitted to the locking groove, thereby allowing the upper member and the lower member to be resilient of the coupling ring. Removable abutment of dental implant to which is combined. The abutment structure of claim 1, wherein, as the detachable structure, the abutment structure includes a head portion inclined to be narrowed toward an end thereof when provided in the lower member, and a receiving space provided in the upper member to accommodate the head portion. The detachable abutment of the dental implant, the upper member and the lower member is maintained by the friction force and the negative pressure. The dental implant of claim 1, wherein as the detachable structure, any one of the upper member and the lower member is provided with a protrusion, and the other member is provided with a locking groove into which the protrusion can be fitted. Detachable abutment. The detachable abutment of a dental implant according to claim 1, comprising at least two detachable structures selected from the detachable structure of claim 2, the detachable structure of claim 3, and the detachable structure of claim 4. An abutment for fixing an implant prosthesis fixed to an alveolar bone, the lower member being fixed to the fixture, the upper member fixed to the implant prosthesis, and the lower member and the upper member separated from each other. A method of manufacturing an implant prosthesis using a detachable abutment of a dental implant having a detachable structure that is capable of bonding, A method of manufacturing a dental implant prosthesis comprising the step of integrally forming the upper member separated from the lower member of the abutment during the casting of the dental implant prosthesis.

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