KR20150019761A - Dental implant - Google Patents

Abstract

The present invention relates to a dental implant. The dental implant: makes artificial teeth more effectively buffer impact from external pressure in the horizontal direction and occlusal force in various directions; is transplanted in an easy manner; has substantially enhanced durability; and thus can have an extended life span. The dental implant includes: a fixation body which has an axial bore formed on an upper part thereof and is implanted into a jaw bone; and an abutment that is inserted in the axial bore of the fixation body and comprises a lower joining shaft part elastically joined with the fixation body, and an upper mount part on which a prosthesis is mounted. The dental implant includes an impact buffering part, which has a lower end portion located on the lower joining shaft part of the abutment and includes at least one penetrated hole. An elastic joining part is formed on an outer circumferential side of the impact buffering part. A corresponding joining part corresponding to the elastic joining part is formed on an inner side of the axial bore of the fixation body with which the joining shaft part is joined. Therefore, the joining shaft part is elastically joined with the axial bore.

Description

[0001] DENTAL IMPLANT [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental implant related to an artificial tooth, and more particularly, to a dental implant related to an artificial tooth. More specifically, the artificial tooth can more effectively buffer lateral impact, And to prolong the service life of the implant.

Generally, an implant implies a substitute of a lost natural tooth, or a fixture is implanted in the jawbone for a predetermined period of time to be fused with the jawbone, and then a prosthesis such as a fastening member and an artificial tooth is fixed thereon. It is a dental procedure that restores function.

In the case of a commonly used implant, a fixture that is implanted in the jawbone and an upper shaft hole of the fixture are coupled to each other by a threaded joint.

However, in such a conventional screw type coupling method, there is a problem such as screw loosening, screw fracture, and non-esthetics of the prosthesis because the joint of the lower structure and the upper structure depend entirely on the screw connection.

In order to solve such a problem, Korean Patent Registration No. 10-0668368 discloses a dental implant, as shown in Fig. 1, in which a shaft hole 12 is formed at an upper portion and a fixture 10, And an abutment stem (22) which forms a fastening leg (22) of a shape memory alloy to be inserted into the shaft hole (12) at a lower portion thereof and connects the fastening leg (22) 20) of the dental implant (1).

In the conventional dental implant 1 as described above, the fastening recesses 14 of the fixture 10 and the fastening protrusions 24 of the abutment 20 are elastically coupled with each other in a complementary manner, It is possible to prevent the loosening phenomenon and the rupture of the screw, and to obtain the effect of securing the esthetics of the prosthesis.

1, when a lateral external pressure P or an occlusal force in various directions is applied to the implant from the outside, the conventional dental implant 1 is moved from the abutment 20 Occasionally, the connecting portion C of the elongated fastening leg 22 is structurally fragile and cracks or breaks or the fastening leg is disengaged from the fixture.

That is, the fastening leg 22 made of a shape memory alloy has a limit that the diameter of a fixture to be fastened thereto can not be increased as much as possible, and the thickness of the fastening leg 22 is thickened for elastic coupling with the fixture 10 The external fatigue of the abutment leg 22 can be prevented from being generated in the connecting portion C of the abutment leg 22 due to the repeated fatigue load when the lateral external pressure or the occlusal force in various directions is applied to the implant 1. [ As a result, the abutment 20 is broken and separated from the fixture 10, resulting in a problem that durability and service life are greatly reduced. Also, since the fastening portion of the fastening leg is not fixed The fastening leg type, which is often open to the downward direction when a strong lateral external pressure is applied, often results in a more effective impact There was a limit to mitigation.

It is an object of the present invention to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a method of implanting an abutment, which can strengthen the structure of a fastening leg connecting an abutment to a fixture, The present invention provides a dental implant that can maximize impact buffering effect by dispersing external pressure more effectively on the entire surface of a solid body, easy to perform, and greatly improved durability, thereby extending the service life of the implant.

According to an aspect of the present invention, there is provided a suture including: And an abutment comprising an upper mounting portion on which a prosthesis is mounted, wherein the abutment is inserted into the shaft hole of the fixture to elastically engage with the fixture,

And a shock absorbing portion formed of at least one horizontal through hole having a lower end positioned on the lower engaging shaft portion of the abutment, wherein an elastic body portion is formed on an outer circumferential surface of the shock absorbing portion, And a corresponding fastening portion corresponding to the resilient fastening portion is formed so that when the fastening shaft portion is engaged with the shaft hole, the fastening portion is resiliently coupled.

Preferably, the outer circumferential surface of the shock absorbing portion of the fastening shaft portion is formed with an elastic body composed of a fastening groove, a fastening protrusion or a fastening step, and the fastening protrusion, the fastening groove, And a fastening portion formed of a stepped portion is formed and has a fastening portion elastically engaged when the fastening shaft portion is engaged with the shaft hole.

More preferably, the impact buffering part forms a closed end of a rod or tube shape at the lower end thereof, and the horizontal through-hole is formed at a plurality of equal intervals in the circumferential direction of the fastening shaft part.

Most preferably, the fastening shaft portion is formed in a tapered structure having a reduced cross-sectional area from an upper end portion to a lower end portion, and the shaft hole of the fixture forms an inner circumferential surface of a tapered structure corresponding to a tapered structure of the fastening shaft portion, Thereby facilitating the insertion of the fastening shaft into the shaft hole.

According to the embodiment of the present invention, auxiliary grooves are selectively formed in the upper, lower, or upper and lower portions of the elastic body portion formed in the fastening shaft portion to increase the elastic force of the fastening shaft portion in the fastening operation of the fastening shaft portion and the fixture .

Preferably, each of the horizontal through holes has a rectangular cross section, a circular cross section, an elliptical cross section, or a polygonal cross section. More preferably, the shape of the fastening shaft portion can be formed not only in a cylindrical shape, but also in a polygonal shape for preventing rotation around the abutment, and a shape in which a cylindrical shape and a polygonal shape are mixed.

Preferably, at least one shock buffer consisting of the horizontal through holes is formed.

Preferably, the fastening shaft portion is made of a shape memory alloy or plastic having elasticity.

Preferably, the horizontal through hole is filled with an elastic body made of a rubber material.

In the dental implant according to the present invention, the abutment is resiliently coupled to the shaft hole of the fixture to be inserted into the jawbone. In the dental implant, the shock absorbing portion is formed of at least one horizontal through hole in the lower fastening shaft portion. The lower end of the through hole is formed to be positioned at the lower fastening shaft portion of the abutment, and the shock absorber has a structure in which the lower end forms a closed end in the shape of a rod or a tube.

Therefore, in the dental implant according to the present invention, the abutment shaft portion forms a closed end in the form of a rod or a tube, unlike the existing leg structure, in the structure in which the abutment is connected to the fixture. Thereby effectively reinforcing the structural axis of the fastening shaft portion of the abutment, and consequently being firmly supported against the lateral external pressure exerted on the implant, and to be able to distribute the applied external pressure or impact more effectively on the entire surface of the fixture So that damage and breakage of the jawbone is prevented, the durability of the fastening shaft connecting portion is greatly extended, and the service life of the implant can be greatly extended.

According to the present invention, an auxiliary groove or auxiliary through hole is selectively formed in the upper, lower, or upper and lower portions of the elastic body portion formed on the outer circumferential surface of the impact buffer portion of the tightening shaft portion to reduce the cross- It is possible to increase the elastic force of the fastening shaft part according to the reduction of the section, so that when the lower fastening shaft part of the abutment is simply inserted into the shaft hole of the fixture, it can be easily and resiliently engaged, do.

According to the present invention, since the upper and lower portions of the elastic body portion of the fastening shaft portion form the closed end, when the fastening protrusion, the fastening groove or the fastening step are coupled with the same size, A much higher elastic fastening force can be maintained.

FIG. 1 is an explanatory view showing a problem that cracks are generated in the legs in the fastening leg structure according to the related art, and durability is weakened.
2 is an exploded perspective view of a dental implant according to the present invention.
FIGS. 3A to 3D are cross-sectional views illustrating horizontal through-holes provided in the dental implant according to the present invention in various configurations and numbers.
FIG. 4A is a cross-sectional view illustrating a structure in which a fastening groove is formed in a ring shape concave on a fastening shaft portion of a dental implant according to the present invention, and a fastening protrusion is convexly formed on an inner circumferential surface of a shaft hole of the fixture.
FIG. 4B is a cross-sectional view illustrating a structure in which a fastening protrusion is formed in a ring-like convex shape in a fastening shaft portion of a dental implant according to the present invention, and a fastening groove is concavely formed in an inner circumferential surface of a shaft hole of the fixture.
5A is a cross-sectional view of a dental implant according to the present invention having a fastening shaft portion and a shaft hole formed in a cylindrical shape.
5B is a cross-sectional view of a tapered structure of the fastening shaft portion and the shaft hole in the dental implant according to the present invention.
6A is a cross-sectional view illustrating a structure in which auxiliary grooves are formed in a lower portion of a fastening protrusion and a fastening groove in a dental implant according to the present invention.
FIG. 6B is a sectional view showing a structure in which auxiliary grooves are formed on the upper and lower sides of the fastening protrusion and the fastening groove in the dental implant according to the present invention, respectively.
FIG. 7 is a cross-sectional view illustrating a structure in which a plurality of auxiliary through holes are formed in the fastening shaft portion in the dental implant according to the present invention.
8A is a cross-sectional view illustrating a structure in which a fastening shaft portion is bent toward a horizontal through hole immediately before a fastening protrusion and a fastening groove are engaged in a dental implant according to the present invention.
8B is a cross-sectional view illustrating a structure in which a fastening protrusion and a fastening groove are combined in the dental implant according to the present invention.
FIG. 9 is a cross-sectional view illustrating that the horizontal through-holes provided in the dental implant according to the present invention can be formed in various structures, shapes, and numbers.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. As used herein, the term 'elastomeric joint' refers to a fastening protrusion 162, a fastening groove 164 or a fastening step formed on the outer circumferential surface of the fastening shaft portion 122, and a 'corresponding fastening portion' The fastening protrusion 162 formed on the outer circumferential surface of the shaft hole 112 and the fastening protrusion 152 formed on the inner circumferential surface of the shaft hole 112 in correspondence with the fastening groove 164 or the fastening step, .

2, the dental implant 100 according to the present invention includes a shaft hole 112 formed at an upper portion thereof, a guide hole 114 formed therein, and a fixture (not shown) A lower fastening shaft 122 inserted into the shaft hole 112 of the fixture 110 and elastically coupled with the fixture 110 and an upper mounting portion 124 on which the prosthesis is mounted, (120).

It is preferable that the fixture 110 and the abutment 120 are entirely made of the shape memory alloy or at least the fastening shaft 122 of the abutment 120 is partially made of the shape memory alloy.

That is, the shape memory alloy used in the abutment 120 is a conventional alloying material known in the art. It is a type of self-recovering constituent material having a property of remembering a desired shape and recovering the shape when the temperature is proper Alloy. Such shape memory alloys include Ti-Ni-based alloys and Cu-Zn-Al-based alloys. Further, it is needless to say that the present invention is also applicable to an abutment made of a plastic material having elasticity.

The dental implant 100 according to the present invention includes a shock absorbing portion 140 formed of at least one horizontal through hole 142 in the lower fastening shaft portion 22 of the abutment 120, 122 forms a closed end 122a having a lower end in the shape of a rod or a tube.

The horizontal through-hole 142 of the impact buffering part 140 may be formed in the fastening shaft part 122 as shown in FIG. 3A, but may be formed two in a row, as shown in FIG. 3B 3C, and 3D, the fastening shaft portion 122 may be formed in a number of 3 to 4 at equal intervals in the circumferential direction of the cross section.

That is, at least one shock buffering part 140 formed of the horizontal through-holes 142 is formed in the fastening shaft part 122, and the shape of the horizontal through-holes 142 is rectangular, circular, elliptical, or polygonal But may be configured in various shapes.

4A, the horizontal through-hole 142 of the impact buffering part 140 is formed over the upper and lower sections of the fastening shaft part 122 of the abutment 120, or, as shown in FIG. 4B, And may extend to the inside of the upper mounting portion 124 on the upper portion of the shaft portion 122, as a matter of course.

Further, the horizontal through-hole 142 may be filled with an elastic body (not shown) made of a rubber material to function as an auxiliary elastic means.

* The shape of the fastening shaft can be a cylindrical shape or a polygonal shape as well as a cylindrical shape and a polygonal shape.

In the dental implant 100 according to the present invention, the fastening protrusion 152, the fastening groove 154 or the fastening step is formed on the inner peripheral surface of the shaft hole 112 of the fixture 110, and the fastening shaft portion 122 The coupling protrusion 162 and the coupling groove 164 or the coupling step are formed to correspond to the outer surface of the coupling shaft 122 so as to be elastically coupled when the coupling shaft 122 is coupled to the shaft hole 112.

That is, the coupling groove 164, the coupling protrusion 162, or the coupling step (so-called elastic body coupling part) formed on the outer surface of the shock cushion part, which is the horizontal through hole of the coupling shaft part 122, 4A and 4B in cooperation with the fastening protrusion 152 formed in the inner peripheral surface of the shaft hole 112, the fastening groove 154, or the fastening step (so-called corresponding fastening portion) corresponding to the projection 162 or the fastening step, And allows fastening body 110 and fastening shaft 122 to be fastened.

4A, when a coupling groove 164 is formed on the outer surface of the impact buffering portion of the coupling shaft portion 122, a coupling protrusion 152 is formed on the inner peripheral surface of the shaft hole 112, 4b, when the fastening protrusion 162 is formed on the outer surface of the fastening shaft portion 122, fastening grooves 154 are formed in the inner circumferential surface of the shaft hole 112 to form an elastic fastening means that interacts with each other . Here, the engaging recesses 154 and 164 are each a ring-shaped concave structure, and the engaging protrusions 152 and 162 may have a ring-shaped convex structure.

5A, the fastening shaft portion 122 may have a cylindrical, polygonal column, or cylindrical structure A having a constant cross-sectional area from an upper end portion to a lower end portion. However, as shown in FIG. 5B, A tapered cylinder having a reduced sectional area from the upper end to the lower end, a polygonal column, or a columnar structure B in which a cylinder and a polygon are mixed.

In the tapered structure B, the shaft hole 112 of the fixing body 110 forms an inner circumferential surface having a tapered structure corresponding to the tapered structure of the fastening shaft portion 122, so that the shaft hole 112 of the fixing body 110, It is possible to facilitate the insertion of the fastening shaft portion 122.

The fastening shaft portion 122 is formed with an auxiliary recess 170 selectively at upper, lower, or upper and lower portions of an elastic body formed on its outer circumference, for example, a fastening protrusion 162, a fastening recess 164, And may be configured to further increase the elastic force of the fastening shaft portion 122 in the fastening operation of the shaft portion 122 and the fixing member 110. [

6A, auxiliary grooves 170 may be formed in a lower portion of the coupling groove 164 formed in the outer circumferential surface of the coupling shaft portion 122, or a coupling groove may be formed in the coupling shaft portion 122, Auxiliary grooves 170 may be formed on the upper and lower portions of the coupling groove 164.

7, unlike the auxiliary recess 170, a plurality of auxiliary through-holes 180 are formed in the fastening shaft 122 and the lower fastening shaft 122 of the abutment 120 It becomes possible to more easily engage with the shaft hole 112 of the fixture 110 when it is engaged and further to increase the impact absorbing effect on the occlusal force.

The auxiliary through holes 180 also reduce the cross-sectional thickness of the fastening shaft 122 similar to the auxiliary recess 170, thereby further increasing the elasticity and warpage of the fastening shaft 122.

In the dental implant 100 according to the present invention constructed as described above, the fixture 110 is placed in the jawbone of the patient in a conventional manner, and the shaft hole 112 of the fixture 110 is provided with an abutment 120 are fitted and fixed.

8A, when the fastening shaft portion 122 of the abutment 120 is inserted into the shaft hole 112 of the fixing member 110, the fastening protrusion 152 formed in the shaft hole 112, The outer peripheral surface of the fastening shaft portion 122 of the shock absorbing portion 120 is bent inward and the horizontal through hole 142 of the shock buffer 140 provides a clearance space in which the fastening shaft portion 122 is bent inward.

8B, when the engaging groove 164 of the engaging shaft portion 122 is aligned with the engaging projection 152 of the shaft hole 112 in this state, as shown in FIG. 8B, by the elastic restoring force of the engaging shaft portion 122, The engaging groove 164 and the engaging projection 152 are engaged with each other and a stable engagement is established between the abutment 120 and the fixture 110. [

9 (a), 9 (b), 9 (c) and 9 (d) are cross-sectional views showing that the horizontal through holes provided in the dental implant according to the present invention can be formed in various shapes, It is apparent that the impact buffering portion formed of the horizontal through holes can be formed in various shapes, structures, and numbers. As described above, according to the present invention, when the fastening shaft portion 122 is elastically coupled when the fastening shaft portion 122 is coupled to the shaft hole of the fixing member 110, by forming the horizontal through holes in various shapes, structures and numbers in the fastening shaft portion 122 It should be understood that the present invention is not limited to the drawings shown in Fig. 9 and that various modifications are possible.

The dental implant 100 according to the present invention has a structure in which the abutment 120 is engaged with the shaft hole 112 of the fixture 110 to be inserted into the jawbone, And a shock absorbing part 140 formed of at least one horizontal through hole 142. The horizontal through hole part having the elastic body part has a closed end 122a formed at the lower end thereof as a rod or a tube, Structure.

Therefore, in the present invention, the abutment 120 is connected to the fixture 110. In contrast to the conventional leg structure, the horizontal through-hole provided with the elastic fixture has a rod or tube-like closed end 122a The external force exerted on the fastening shaft portion 122 is dispersed through the entirety of the fastening shaft portion 122 integrally connected to the fastening shaft portion 122. Unlike the conventional leg structure, Not focused.

As described above, according to the present invention, the external force applied to the abutment 120 is effectively dispersed so that the fastening shaft 122 of the abutment 120 is significantly structurally reinforced. As a result, the external pressure applied to the implant 100 The durability of the connecting portion of the fastening shaft 122 is greatly increased and the service life of the implant 100 can be greatly extended and the damage or fracture of the jawbone due to the external pressure concentrated in one place by the effective bite- Can be prevented.

The present invention is also characterized in that an auxiliary groove 170 or an auxiliary through hole 180 is selectively formed in the upper, lower, upper, or lower portions of the fastening protrusion 162 or the fastening groove 164 formed in the fastening shaft portion 122, It is possible to increase the elastic force of the fastening shaft portion 122 due to the reduction in section in the fastening operation of the fastening shaft portion 122 and the fastening body 110, The insertion of the fastening shaft portion 122 of the abutment 120 can be easily and elastically combined and the operation of the implant 100 can be easily performed in the dentistry.

Although the present invention has been described in detail with reference to specific embodiments thereof with reference to the accompanying drawings, the present invention is not limited to such specific structures. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the following claims. However, it is intended that the present invention covers all such modifications and variations as fall within the true scope of the invention. When the fastening shaft is coupled to the shaft hole of the fixture, the step is seated on the upper surface of the fixture so that the fastening shaft is seated on the upper surface of the fixture. As a result, It is possible to prevent the collapse of the stock market.

1: Conventional dental implant 10: Fixture
12: shaft hole 14: fastening groove
20: abutment 24: fastening projection
22: fastening leg 100: dental implant of the present invention
110: fixed body 112:
114: guide hole 120: abutment
122: fastening shaft portion 122a: closed end
124: mounting portion 140: shock buffering portion
142: Horizontal penetration holes 152, 162:
154, 164: fastening groove 170: auxiliary groove
180: Auxiliary through-hole portion A: Cylindrical structure
B: tapered structure C: connection portion
P: external pressure

Claims (9)

A fixture which forms a shaft hole in the upper part and is placed in the jaw bone; And
A lower fastening shaft portion inserted into the shaft hole of the fixture to be elastically coupled with the fixture, and an upper mounting portion on which the prosthesis is mounted, the dental implant comprising:
And a shock absorbing portion formed of at least one horizontal through hole having a lower end positioned on the lower engaging shaft portion of the abutment, wherein an elastic body portion is formed on an outer circumferential surface of the shock absorbing portion, And a corresponding fastening portion corresponding to the resilient fastening portion is formed so that when the fastening shaft portion is engaged with the shaft hole, the fastening shaft portion is resiliently coupled. [3] The apparatus according to claim 1, wherein the outer circumferential surface of the shock absorbing portion of the fastening shaft portion is formed with an elastic body composed of a fastening groove, fastening protrusion or fastening step, and the fastening protrusion, And a fastening portion formed with a fastening step and a fastening portion, the fastening portion being elastically coupled when the fastening shaft portion is coupled to the shaft hole. [2] The shock absorber according to claim 1, wherein the impact buffering portion having an elastic fastening portion on the outer circumferential surface forms a closed end portion of a rod or tube shape at the lower end thereof, and the horizontal through- Wherein the dental implant is a dental implant. [5] The apparatus according to claim 3, wherein the fastening shaft portion is formed in a tapered structure whose cross-sectional area is reduced from an upper end portion to a lower end portion, and the shaft hole of the fixing body forms an inner circumferential surface of a tapered structure corresponding to a tapered structure of the fastening shaft portion, So as to facilitate insertion of the fastening shaft portion into the shaft hole of the dental implant. [3] The apparatus of claim 1, further comprising an auxiliary groove formed at an upper portion, a lower portion, or an upper and lower portion of the elastic body portion formed on the fastening shaft portion to increase the elastic force of the fastening shaft portion in the fastening operation of the fastening shaft portion and the fixture. Dental implants. [2] The dental implant according to claim 1, wherein the horizontal through-hole has a rectangular cross section, an elliptical cross section, or a polygonal cross section. [2] The dental implant of claim 1, wherein at least one shock buffer is formed by the horizontal through holes. The dental implant according to claim 1, wherein the fastening shaft portion is made of a shape memory alloy or plastic having elasticity. The dental implant according to claim 1, wherein the horizontal through hole is filled with an elastic body made of rubber.

Images