KR101662279B1

KR101662279B1 - Anti-loosing structure for implant

Info

Publication number: KR101662279B1
Application number: KR1020150165602A
Authority: KR
Inventors: 나성식; 전혜숙
Original assignee: 나성식; 전혜숙
Priority date: 2015-11-25
Filing date: 2015-11-25
Publication date: 2016-10-04

Abstract

The present invention relates to a structure for preventing the loosening of an abutment which can prevent arbitrary loosening of an abutment by forming a wave having a concavo-convex shape on the contact surface of a fixture and an abutment which are screwed to each other, A fixture which is fixed to the alveolar bone and which is placed on the gum and has a female thread formed along the axial direction; An abutment formed on the upper portion of the fixed portion of the artificial tooth and having a male screw portion on the lower portion and screwed to the female screw portion of the fixture; And a loosening preventing wave protruding from the contact surface between the fixture and the abutment, the loosening preventing wave preventing the loosening of the abutment while being formed by repetitively forming wave repeatedly in a concavo-convex form, And the height of the protrusions and protrusions is formed so as to protrude within a clearance between the female threaded portion and the male threaded portion.

Description

ANTI-LOOSING STRUCTURE FOR IMPLANT < RTI ID = 0.0 >

The present invention relates to a structure for preventing the unthreading of an implant, in which a wave is formed in a contact surface between a fixture and an abutment to be screwed together, and the wave is formed by tightening to prevent arbitrary loosening of the abutment To prevent the implant from being loosened.

Generally, an artificial tooth is an artificially created tooth so as to be almost the same in appearance and function as a natural tooth, and is used as a substitute when a natural tooth is missing.

There are three types of artificial teeth: prosthesis, dentures, or implants in alveolar bone.

In the case of the prosthesis, there is a problem in that it is necessary to shave off other natural teeth around the tooth, resulting in damage to the healthy tooth as well as a long life. In the case of the denture, There is an inconvenience that the user is often detached from the use process.

Thus, in recent years, implants have become more popular than prosthesis or dentures.

An implant is a technique for implanting an artificial tooth into an alveolar bone and restoring it. The implant is largely composed of a fixture that is inserted into the alveolar bone, an abutment that is connected to the fixture to form a connection site, Crown.

More specifically, the fixture is placed in the alveolar bone through a thread formed on the outer circumferential surface, passes through a healing period, and then an abutment is fixed to the screw hole formed at the center through a screw connection. And is fixed to the top of the butt.

However, since the fixture and abutment are simple fastened by a screw connection, there is no problem in general vertical stress (occlusal force) generated when the food is chewed, but the initial fastening force of the abutment when the occlusal force or the lateral pressure larger than the pre-load is applied to the side of the crown, there occurs a problem that the abutment rotates while finely rotating and is released from the fixture.

If the abutment is loosened, the abutment is severely shaken and the abutment is damaged or the fixture is damaged. If such damage occurs, the crown is separated or the whole structure is separated There is a need to re-operate.

Accordingly, in recent years, an implant having a function of preventing fixture and abutment loosening has been developed.

For example, in the case of an implant unit disclosed in Korean Patent Laid-Open No. 10-2008-0049377, a screw for fixing an abutment to a fixture is configured to be separated, and a chamber for preventing the screw from being loosened is separated from a screw .

However, since the above-described prior art has a structure in which a separate chamber constituted by a screw is fastened to the abutment, a space is formed between the screw and the screws or the screw and the abutment, Environment is provided.

In addition, in the case of the implant disclosed in Korean Patent Laid-Open No. 10-2009-0070982, an elastic member is provided between the head of the screw fixing the abutment to the fixture and the head seat to elastically bias the fixed screw upward .

However, since the above-described prior art also has a separate elastic member separated from the screw, there is a fear that a space is formed between the components and the bacteria are inhabited.

Korean Patent Publication No. 10-2008-0049377 Korean Patent Publication No. 10-2009-0070982

The present invention has been made in order to overcome the problems of the prior art as described above, and it is an object of the present invention to simplify the structure by fixing through fixture and abutment by direct screw connection, and to provide a fixture and abutment, The present invention provides an anti-loosening structure for preventing ablation of an abutment through a wave that is coincident with each other when the abutment is fastened.

In order to achieve the above object, according to the present invention, there is provided a fixture for preventing the unthreading of an implant, the fixture being fixed to the alveolar bone and inserted into the gingiva, An abutment formed on the upper portion of the fixed portion of the artificial tooth and having a male screw portion on the lower portion and screwed to the female screw portion of the fixture; And a loosening preventing wave protruding from the contact surface between the fixture and the abutment, the loosening preventing wave preventing the loosening of the abutment while being formed by repetitively forming wave repeatedly in a concavo-convex form, And the height of the protrusions and protrusions is formed so as to protrude within a clearance between the female threaded portion and the male threaded portion.

In addition, the abutment may be provided between the artificial tooth fixing part and the male thread part, and may be inclined to become gradually narrower toward the lower part to form an inclined block to be inserted into the fixture. At the lower end of the inclined block, And a horizontal surface is formed on both sides of the male threaded portion, and the release preventing wave includes a first wave formed along a circumferential direction of the horizontal surface of the abutment; And a second wave formed on the fixture facing the horizontal surface and cooperating with the first wave.

In addition, the unwinding wave may include a third wave formed along an outer circumferential surface of the inclined block; And a fourth wave formed on the fixture facing the inclined block to be combined with the third wave.

Here, the concavities and convexities may be formed in a steep shape in a loosening direction of the abutment while having a round shape and repeatedly protruding and depressing, and having a gentle inclination in the tightening direction of the abutment.

Further, the present invention further includes a fixing pin for fixing the abutment to the fixture in a state that the abutment is prevented from being loosened while the other end is fitted and fixed to the abutment in a state where one end is fitted and fixed in the fixture, .

It is preferable that the fixing pin is fitted and fixed in a state of being embedded in the outer circumferential surface of the fixture and the outer circumferential surface of the abutment.

The fixing pin may be formed in such a manner that a gap between both end portions of the fixing pin and the abutment, which are respectively inserted into the fixture and the abutment, gradually decreases toward the end, The fixture and the abutment can be pressed and fixed through the elastic force.

According to the structure for preventing the unthreading of the implant according to the present invention as described above, since the fixture and the abutment are combined with each other through the release preventing wave formed on the contact surface between the fixture and the abutment, The artificial tooth does not flow or rotate even by repetitive chewing motion. Therefore, the trouble associated with the re-implantation of the implant can be solved.

Particularly, according to the present invention, since the height of the unevenness forming the unwinding wave is protruded within the range of the clearance between the female thread portion and the male thread portion, when the abutment is tightened, the armature can be smoothly rotated, Breakage of the screw portion due to excessive tightening of the butt can be prevented.

In addition, the abutment can be fixed according to the size of the artificial teeth or the state of the alveolar bone by adjusting the tightening strength of the abutment by applying different heights of the unevenness of the anti-loosening wave.

In addition, since the unwind prevention wave is formed on the horizontal surface or the inclined block of the abutment, the unwind prevention wave can be formed in accordance with the shape of the abutment.

Further, in the case where the fixing pin having both ends fixed to the fixture and the abutment is constituted, the abutment and the fixture are constrained by the fixing pin in a combined state through the loosening preventing wave, Of course, since the upward and downward movement of the abutment is prevented, the abutment can be more firmly fixed to the fixture.

In addition, when both ends of the fixing pin are engaged with the fixture and the abutment, an elastic force is applied to the fixing pin and the abutment and the fixture are fixed in a pressurized state, so that the abutment can be more firmly fixed have.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an assembled cross-sectional view of a fixture and abutment for illustrating a structure for preventing the unthreading of an implant according to the present invention; FIG.
2 is an exploded perspective view showing a fixture and abutment according to the present invention;
3 is an exploded perspective view showing the fixture shown in Fig.
4 is a vertical cross-sectional view showing a state in which a release preventing wave of the present invention is in a state of being engaged.
Fig. 5 is a vertical cross-sectional view showing another form of the unevenness constituting the unwinding preventing wave. Fig.
Fig. 6 is an exploded perspective view showing another embodiment of the unwind prevention wave shown in Fig. 2; Fig.
7 is a longitudinal sectional view showing a state in which a fixing pin is added to the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted.

Embodiments in accordance with the concepts of the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It is to be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms of disclosure, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

The structure for preventing the unthreading of the implant according to the embodiment of the present invention may include the fixture 100, the abutment 200 and the release preventing wave 300 as shown in FIG.

The fixture 100 is a component that is directly implanted in the alveolar bone and serves as the root of the tooth.

As shown in FIGS. 1 and 2, the fixture 100 is threaded along the outer circumferential surface of the fixture 100 and is placed on the alveolar bone. The female screw 110 is formed along the axial direction of the fixture 100, Lt; / RTI >

The fixture 100 is placed in the alveolar bone and then undergoes a healing period of the gingure. At this time, the healing cap (not shown) is installed on the female screw 110 to keep the gum open.

Here, the upper end of the fixture 100 is formed in such a form that a mount driver used in the placement procedure can be engaged.

The abutment 200 is a component that is coupled to the fixture 100 after the healing period of the fixture 100 is completed to provide the creation site of the artificial teeth.

As shown in FIGS. 1 and 2, the abutment 200 includes a male screw portion 210 formed at the lower portion thereof and is screwed to the female screw portion 110 of the fixture 100, And an artificial tooth (not shown) is fixed to the upper artificial tooth fixing portion 220.

More specifically, the abutment 200 has a tapered block 230 formed between the artificial tooth fixing part 220 and the male threaded part 210 in a conical shape and becoming narrower toward the lower side, and is inserted into the fixture 100 And is fixed in a close contact state. The abutment 200 has a horizontal surface orthogonal to the male threaded portion 210 on both sides of the male threaded portion 210 and is in close contact with the fixture 100.

Here, the abutment 200 has the polygonal structure of the artificial tooth fixing part 220 to form a joint part of the mount driver, and is fastened while being rotated by the mount driver. At this time, the mount driver is preferably constituted by a torque wrench for tightening the abutment 200 with the set pressure.

That is, unlike the conventional art in which the abutment 200 is constructed as a single body with the male threaded portion 210, the gap between the components is minimized and the formation of the bacteria can be suppressed.

The release preventing wave 300 is a component for preventing the abutment 200 from loosening by assembling the abutment 200 and the fixture 100. The fixture 100 and the abutment 100, Are repeatedly protruded in the form of concavo-convex shapes on the contact surfaces of the abutments 200, and are engaged with each other by tightening the abutment 200.

Specifically, the unwrapping wave 300 may comprise a first wave 310 and a second wave 320, as shown in FIGS. 2 and 3.

2, the first wave 310 is protruded in a circumferential direction on a horizontal plane adjacent to the male threaded portion 210 of the abutment 200, and the second wave 310 is protruded in a concave- The first wave 310 protrudes from the contact surface of the fixture 100 corresponding to the first wave 310 so as to prevent the abutment 200 from unwinding arbitrarily when the abutment 200 is fastened. do.

4, the height h1 of the concave and convex protrusions 300 is equal to the clearance h2 between the female threaded portion 110 of the fixture 100 and the male threaded portion 210 of the abutment 200, , And preferably the height h1 of the concavities and convexities may be the same as the clearance h2 between the screw portions.

When the height h1 of the concave and convex protrudes more than the clearance h2, the male thread portion 210 is forcibly rotated when the abutment 200 is fastened. Therefore, the male thread portion 210 or the female thread portion 110 Deformation or breakage may occur,

When the height h1 of the concavities and convexities protrudes significantly lower than the clearance h2, the loosening preventing wave 300 is loosened and the abutment 200 may be loosened arbitrarily.

That is, when the height h1 of the unevenness of the loosening preventing wave 300 is made different, the fastening strength of the abutment 200 can be made different.

As shown in FIGS. 5 and 6, the anti-loose wave 300 is protruded in a round shape so that the loose-proof wave 300 can smoothly contact each other when the abutment 200 is rotated.

6, the unevenness of the unwinding wave 300 has a round shape, and at the same time, has a gentle slope in the tightening direction of the abutment 200, and is formed in a loosening direction of the abutment 200 May be formed as steep slopes.

As a result, the unwinding wave 300 can further suppress the unwinding of the abutment 200.

Meanwhile, the unwind prevention wave 300 may further include a third wave 330 and a fourth wave 340 as shown in FIG.

The third wave 330 is formed in a circumferential direction along an inclined surface of the inclined block 230 constituting the abutment 200 as shown in FIG. 6, and the fourth wave 340 is formed in a circumferential direction along the inclined surface of the third wave 330 And is engaged with the third wave 330 when the abutment 200 is tightened.

The structure for preventing the unthreading of the implant according to the present invention may further include a fixing pin 500, as shown in FIG.

7, the fixing pin 500 is formed of a pin having a U-shape, and both ends thereof are fitted and fixed to the fixture 100 and the abutment 200, respectively, so that the abutment 200 is loosened Restraint in a prevented state.

That is, the fixing pin 500 is fixed to the fixture 100 and the abutment 200, respectively, in a state where the unwinding wave 300 is fitted, thereby preventing the abutment 200 from rotating , Thereby preventing the abutment (200) from flowing in the vertical direction due to the clearance between the threaded portions.

Therefore, the abutment 500 can be firmly fixed in a state of being prevented from being loosened since it is locked by the fixing pin 500 while being fastened to the fixture by the union of the loosening preventing wave 300.

It is preferable that the fixing pin 500 is fixed in the state of being embedded in the outer circumferential surface of the fixture 100 and the outer circumferential surface of the abutment. This is to minimize the gap between the fixing pin 500 and the fixture 100 and the abutment 200.

In addition, the fixing pin 500 may be formed so that the gap between the both ends gradually narrows toward the end, and can be fixed to the fixture 100 and the abutment 200, respectively. That is, since the fixing pin 500 is inserted in a state where the both ends thereof are opened, and the elastic force is provided, the fixture 100 and the abutment 200 can be pressed more firmly by the elastic force.

The fixed part where the fixing pin 500 is fixed may be formed at only one place in the fixture 100 and the abutment 200. Alternatively, 200 may be formed in plural along the circumferential direction.

As described above, the implant according to the present invention is characterized in that the fixture 100 and the abutment 200 are coupled with each other through the release preventing wave 300 formed on the contact surfaces of the fixture 100 and the abutment 200, The artificial teeth do not rotate or rotate even by repetitive chewing motion because arbitrary loosening of the abutment 200 is prevented.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various changes, substitutions, and alterations can be made therein without departing from the spirit of the invention.

100: Fixtures
110: female thread part
200: abutment
210: male threads
300: Anti-loose wave
310: 1st wave
320: The second wave
330: Third Wave
340: fourth wave
500: Fixing pin

Claims

A fixture which is fixed to the alveolar bone and which is placed on the gum and has a female thread formed along the axial direction;
An abutment formed on the upper portion of the fixed portion of the artificial tooth and having a male screw portion on the lower portion and screwed to the female screw portion of the fixture; And
And a loosening preventing wave protruding from the contact surface between the fixture and the abutment to form a wave repeatedly formed in a concavo-convex form, the loosening preventing wave being formed by tightening the abutment to prevent loosening of the abutment, ,
The anti-
The height of the protrusions and protrusions is formed to protrude within a clearance between the female thread portion and the male thread portion,
The abutment may include:
And an inclined block which is formed between the artificial tooth fixing part and the male screw part to be inclined gradually toward the lower part so as to be inserted into the fixture and the male screw part is formed at the lower end of the inclined block, A horizontal surface is formed on the surface,
The anti-
A first wave formed along the circumferential direction of the horizontal plane of the abutment; And
And a second wave formed on the fixture facing the horizontal surface and cooperating with the first wave,
The anti-
And the height of the protrusions and protrusions is equal to the clearance between the female threaded portion and the male threaded portion.

delete

The method according to claim 1,
The anti-
A third wave formed along an outer circumferential surface of the inclined block; And
Further comprising: a fourth wave formed on the fixture facing the inclined block to be formed with the third wave.

The method according to claim 1,
The concavo-
Wherein the projections and depressions are repeated while forming a round shape, and the abutment has a gradual slope in the direction of tightening, and is formed as a steep slope in the releasing direction of the abutment.

The method according to claim 1,
And a fixing pin for fixing the abutment to the fixture in a state that the abutment is prevented from being loosened while the other end is fitted and fixed to the abutment in a state where one end is fitted and fixed to the fixture. Loosening prevention structure.

The method of claim 5,
Wherein the fixing pin includes:
Wherein the fixture is fitted and fixed in a state of being embedded in the outer circumferential surface of the fixture and the outer circumferential surface of the abutment.

The method of claim 5,
Wherein the fixing pin includes:
The fixture and the abutment being inserted into the fixture and the abutment while being spaced apart from each other at both ends of the fixture and the abutment, Wherein the abutment is pressed and fixed.