KR102048659B1 - Improved implant assembly with screw loosening prevention fucntion - Google Patents

Abstract

Disclosed is an implant assembly having a function of preventing a screw from being unscrewed. The disclosed implant assembly comprises: a fixture implanted in the alveolar and having a screw fastening hole in a center of an upper end thereof; an abutment put on an upper part of the fixture and coupled by a connection screw; and a crown covered on the abutment to be fixed. The abutment has a screw through-hole formed in a lower part thereof, through which the connection screw passes to be screw-fastened to the screw fastening hole, and a screw insertion hole formed in an upper part thereof, which is connected to the screw through-hole and allows the connection screw to be inserted through the screw through-hole. The connection screw is inserted through the screw insertion hole and passes through the screw through-hole to be screw-fastened to the screw fastening hole such that the abutment is fixed to the fixture. A first female screw thread unit having a screw thread formed thereon is formed in an inner circumferential surface of the screw insertion hole. The crown has a second female screw thread unit which vertically penetrates and is formed to be connected with the screw insertion hole and has a screw thread formed on an inner circumferential surface. The present invention further comprises an unscrewing prevention bolt which is screw-fastened to the second female screw thread unit and the first female screw thread unit, sequentially, in order to make a lower end come into close contact with an upper end of the connection screw and prevents the connection screw from being unscrewed.

Description

Implanted implant assembly with screw loosening prevention fucntion}

The present invention relates to an implant assembly, and more particularly, it is made of a structure that prevents the loosening of the connection screw can maintain a solid coupling state for a long time, to prevent screw loosening to extend the maintenance cycle of the implant to be used semi-permanently It relates to an improved implant assembly.

Generally, in the past, when a tooth falls out, crowns, bridges, dentures, etc. have been used, but recently, implant procedures have been widely used as a method of solving the problems of the conventional method.

The implant assembly for the implant procedure, the fixture 10 is placed in the alveolar bone as shown in Figure 1, the abutment 20 is fixed to the upper portion of the fixture 10 through the connection screw 30, and the abutment It is configured to include a crown 40 as a prosthesis which is covered on the top of the 20 to be fixed by adhesive or the like.

Referring to the coupling of the fixture 10 and the abutment 20, the abutment 20 is formed with a screw insertion opening 22 provided with a jaw portion 24 on the central axis. Raise (20) on the fixture (10), and then insert the connection screw 30 through the screw insertion hole 22, the connection screw 30 is projected to the lower portion of the abutment 20, the center of the fixture (10) By screwing into the screw fastening hole 13 formed in the abutment 20 is configured to be fixedly coupled to the fixture (10).

However, in the conventional implant assembly as shown in FIG. 1, in the state in which the abutment 20 and the fixture 10 are coupled through the connection screw 30, the upper space s of the screw insertion hole 22 is empty. Therefore, if a long time passes after the implant operation, the coupling screw 30 is loosened due to external factors such as vibration or shock, and the coupling degree between the abutment 20 and the fixture 10 is lowered, and thus the crown 40 ), Such as shaking, and, accordingly, periodically visit the dentist to retighten the connecting screw 30, or replace the abutment 20 and the crown 40 with new ones. There is a hassle to repair, and as maintenance is performed in such a short cycle, the cost of maintenance increases and it is very burdensome for the user.

Patent Registration 10-1173758 Patent Registration 10-1953301

The present invention was devised to solve the conventional problems as described above, and can be used semi-permanently by preventing the loosening of the connection screw coupling the fixture and the abutment to improve the service life of the implant. It is an object of the present invention to provide an implant assembly having a screw loosening prevention function.

Implant assembly having a screw loosening prevention function of the present invention for achieving the above object is a fixture that is implanted in the alveolar bone and the screw fastening hole is formed in the center of the upper end, the abutment is placed on the upper portion of the fixture and coupled by a connection screw In the implant assembly consisting of a crown is fixed to the abutment is installed on the abutment, the abutment is a screw through hole for screwing into the screw fastening hole is passed through the connection screw is formed at the bottom, the A screw insertion hole is formed to be connected to a screw through hole and to allow the connection screw to be inserted into the screw through hole. The connecting screw is inserted through the screw insertion hole and passed through the screw through hole to be screwed into the screw fastening hole. The abutment is configured to be fixed to the fixture, the inside of the screw insertion hole The surface is configured to form a threaded first female threaded portion, the crown is formed up and down through the connection to the screw insertion hole, the inner threaded surface is provided with a second female threaded threaded portion, the lower end of the connection screw It is further characterized in that it is screwed in order to be in close contact with the second female screw thread and the first female screw thread to prevent the loosening of the connection screw.

The loosening prevention bolt may be configured to have a length from an upper end of the connecting screw to an upper end of the second female threaded portion in a state where the connecting screw is inserted into the screw insertion hole and screwed to the fixture. .

The anti-loosening bolt may be configured to consist of tanned bolts.

According to the above, since the implant assembly having a screw anti-loosening function of the present invention is a configuration in which the anti-loosening bolt is screwed to the abutment or / and the crown so as to be in close contact with the upper end of the connection screw for fixing the abutment to the fixture. Also, the connection screw is not loosened by external factors such as external shock or vibration, so that the abutment and fixture can be maintained in a firmly coupled state, and thus the service life of the implant can be greatly improved. It can be used to increase maintenance intervals for implants, which can reduce maintenance costs.

In addition, in the present invention, the abutment and fixtures are fixed with a connection screw, so that no empty space is formed in the upper part of the abutment screw insertion hole, so that the loosening bolt is screwed into the screw insertion hole and assembled into a filled form. , Food and the like does not enter the screw insertion hole of the abutment, there is an effect that can prevent food from being caught by the odor.

In addition, the present invention forms a second female threaded portion formed through the crown and threaded on the inner circumferential surface of the crown so as to be connected to the threaded insertion hole, and screwing one loosening prevention bolt sequentially to the female threaded portion of the second female threaded portion and the screw insertion hole When the fastening bolt is configured to be tightened, the lower end of the pulley preventing bolt is in close contact with the upper end of the connecting screw to prevent loosening of the connecting screw, and the combination of the abutment and the crown is more firmly secured by the loosening preventing bolt. There is an effect that the durability can be further improved.

1 is a cross-sectional view showing a coupling structure of a typical implant assembly,
Figure 2 is a cross-sectional view showing an implant assembly having a screw loosening prevention function according to a first embodiment of the present invention,
3 is a cross-sectional view showing an implant assembly having a screw loosening prevention function according to a second embodiment of the present invention.

Objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and to fully convey the spirit of the present invention to those skilled in the art.

In the present specification, when a component is mentioned to be on another component, it means that it may be formed directly on the other component or a third component may be interposed therebetween. In addition, in the drawings, the thickness of the components are exaggerated for the effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional views and / or plan views, which are ideal exemplary views of the present invention. In the drawings, the thicknesses of films and regions are exaggerated for effective explanation of technical content. Therefore, the shape of the exemplary diagram may be modified by manufacturing techniques and / or tolerances. Therefore, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in forms generated according to manufacturing processes. For example, the etched regions shown at right angles may be rounded or have a predetermined curvature. Thus, the regions illustrated in the figures have properties, and the shape of the regions illustrated in the figures is intended to illustrate a particular type of region of the device and is not intended to limit the scope of the invention. Although terms such as first and second are used to describe various components in various embodiments of the present specification, these components should not be limited by these terms. These terms are only used to distinguish one component from another. The embodiments described and illustrated herein also include complementary embodiments thereof.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the words 'comprises' and / or 'comprising' do not exclude the presence or addition of one or more other components.

In describing the following specific embodiments, various specific details are set forth in order to explain and understand the invention in more detail. However, one of ordinary skill in the art can understand that the present invention can be used without these various specific details. In some cases, it is mentioned in advance that parts of the invention that are commonly known in the present invention and that are not highly related to the invention are not described in order to prevent confusion in explaining the present invention without cause.

Hereinafter, with reference to FIG. 2, an implant assembly 1 having a screw loosening prevention function according to a first embodiment of the present invention will be described.

The implant assembly 1 of the present invention is a fixture 10 that is placed in the alveolar bone, the abutment 50 coupled to the fixture 10 through the connection screw 30, and the upper portion of the abutment 50 It is configured to include a crown 60, the anti-loosening bolt 70 as a prosthesis to be covered and secured through the adhesive.

The fixture 10 is configured to be the same as a conventional fixture, and is configured to form a female screw-type screwing hole 13 in which a connection screw 30 is fastened to an upper center.

The abutment 50 has a screw through hole 51 for screwing into the screw fastening hole 13 while protruding to the lower part of the abutment 50 by inserting the connection screw 30 into the central axis. The upper portion is connected to the screw through hole 51 as a central axis and is configured to form a screw insertion hole 53 for inserting the connection screw 30.

The screw insertion hole 53 is configured to have a larger diameter than the head portion 31 of the connection screw 30, and the screw through hole 51 is larger in diameter than the screw portion 33 of the connection screw 30 and the head portion ( 31 is configured to have a smaller diameter than the stepped portion 52 is formed between the screw insertion hole 53 and the screw through hole 51.

With the above-described configuration, the connecting screw 30 is inserted through the open upper portion of the screw insertion hole 53 so that the screw portion 31 passes through the screw passing hole 51, and then the head of the connecting screw 30. The screw portion 33 of the connecting screw 30 is screwed into the screwing hole 13 of the fixture 10 until the portion 31 is caught by the stepped portion 52, thereby tightening the fixture 10. The abutment 50 may be firmly fixed to the upper portion.

The present invention is configured such that the female threaded portion 53a is formed on the inner circumferential surface of the screw insertion hole 53 for screwing the loosening prevention bolt 70.

The female threaded portion 53a may be formed in the entire length of the screw insertion hole 53 or may be configured so that only a part of the female threaded portion 53a is formed on the upper side of the screw insertion hole 53.

The anti-loosening bolt 70 is a tannery bolt, that is, a wrench tannery bolt formed with a hexagonal wrench groove 72 for operating with a wrench at the top without a head of a bolt, and a female thread part formed in the screw insertion hole 53 ( It is configured to screw onto 53a).

When the anti-loosening bolt 70 is tightened until it is completely tightened to the female threaded portion 53 of the screw insertion hole 53, the anti-loosening bolt 70 is disposed on the upper end of the connection screw 30, that is, the top of the head part 31. ) The bottom of the contact is in close contact, it can be prevented from loosening the connection screw 30 in the screw fastening hole 13 by the external vibration or shock.

In the present invention, the loosening prevention bolt 70 has a length from the top of the head 31 of the connection screw 30 in the state in which the fixture 10 and the abutment 50 are coupled to each other through the connection screw 30. It is preferably configured to be equal to or greater than the length to the top of the ball 53.

In this case, when the loosening bolt 70 is screwed into the female threaded portion 53 of the screw insertion hole 53, the entire area of the screw insertion hole 53 is completely filled by the loosening prevention bolt 70, Space is not generated, and in such a state, when fixing the crown 60 with an adhesive so as to cover the upper portion of the abutment 50, the inner bottom of the crown 60 is the upper end of the loosening prevention bolt 70 By being in close contact with the shape, the connection screw 30 can be further prevented from being released from the screw fastening hole 13 by external vibration or shock.

In addition, when the length of the anti-loosening bolt 70 is configured to be larger than the length from the top of the head portion 31 of the connection screw 30 to the top of the screw insertion hole 53, the anti-loosening bolt 70 is screwed in When screwed into the female threaded portion 53 of the ball 53 and fully tightened, the upper end of the loosening prevention bolt 70 may protrude above the screw insertion hole 53, and prevent the loosening from protruding into the screw insertion hole 53. By cutting the upper end of the bolt 70, the anti-loosening bolt 70 does not protrude upward from the upper end of the screw insertion hole 53, the upper end of the anti-loosening bolt 70 is the same height as the upper end of the screw insertion hole 53 Can be

On the other hand, in the present invention, the loosening prevention bolt 70 is made of one, screwed into the screw insertion hole 53 was configured in the form that is filled in the entire screw insertion hole 53, but is not limited to this, the loosening prevention bolt 70 is composed of a plurality of at least two or more, the plurality of loosening bolts may be configured to be screwed to the screw insertion hole 53 in order to completely fill the screw insertion hole 53 of course. . That is, when the anti-loosening bolt 70 is composed of plural, the sum of the total lengths of the plural anti-loosening bolts is equal to the length from the top of the head 31 of the connection screw 30 to the top of the screw insertion hole 53. When the plurality of loosening bolts are screwed to the screw insertion hole 53 sequentially, the same or larger configuration, the entire area of the screw insertion hole 53 is completely filled by the plurality of loosening prevention bolts to generate empty space. It may be configured not to.

Hereinafter, with reference to FIG. 3, an implant assembly 1 'having a screw loosening prevention function according to a second embodiment of the present invention will be described.

The implant assembly 1 'according to the second embodiment is configured such that the center penetrates up and down in the crown 60 and the second female threaded portion 62 is formed on the inner circumferential surface of the implant assembly 1' according to the first embodiment. ) Differs only in that it is formed long enough to be fastened together to the female threaded portion 53a and the second female threaded portion 62 of the screw insertion hole 53. In the remaining configuration, the same configuration is the same as that of the first embodiment. Reference numerals are omitted, and description thereof will be omitted only.

The crown 60 is formed with a second female threaded portion 62 which is vertically penetrated, and the second female threaded portion 62 is configured to be connected to the screw insertion hole 53.

After fixing the abutment 50 to the upper portion of the fixture 10 using the connection screw 30, and fixed by covering the crown 60 with an adhesive on the upper portion of the abutment 50, as shown in FIG. When the anti-loosening bolt 70 is screwed onto the hexagonal wrench through the second female threaded portion 62 of the crown 60, the loosening bolt 70 is connected to the second female threaded portion 62 and the screw insertion hole 53. It can be screwed into the female threaded portion (53a) sequentially, so that the lower end of the loosening bolt 70 is in close contact with the upper end of the connection screw 30, that is, the upper end of the head portion 31, the external vibration or impact By this, the connection screw 30 can be prevented from loosening in the screw fastening hole 13.

In the present embodiment, the loosening prevention bolt 70 is coupled to the fixture 10 and the abutment 50 through the connection screw 30, and the crown 60 is placed on the upper portion of the abutment 50. In the fixed state, it is preferably configured to be equal to or greater than the length from the upper end of the head portion 31 of the connection screw 30 to the upper end of the second female threaded portion 62 of the crown 60.

When the length of the anti-loosening bolt 70 is configured to be equal to the length from the upper end of the head portion 31 of the connection screw 30 to the upper end of the second female threaded portion 62 of the crown 60, the anti-loosening bolt When 70 is sequentially screwed into the second female threaded portion 62 of the crown 60 and the female threaded portion 53a of the screw insertion hole 53, the second female threaded portion 62 and the screw inserted hole 52 The entire area of) can be completely filled by the anti-loosening bolt 70 so that no empty space can be generated.

However, when the length of the loosening prevention bolt 70 is configured to be equal to the length from the top of the head portion 31 of the connection screw 30 to the top of the second female threaded portion 62 of the crown 60, the loosening When the bolts 70 are sequentially screwed into the second female threaded portion 62 of the crown 60 and the female threaded portion 53a of the screw insertion hole 53, the upper surface of the anti-loosening bolt 70 is crowned. Exposed to the outside to form the outer surface of the (60) during the mastication exercise, food and the like can be caught in the wrench groove 72 may cause bacteria to grow, which is not good for hygiene, in this embodiment, although not shown, Filling the wrench grooves 72 with resin, amalgam, gold, and ceramics in the state in which the fastening of the 70 is completed, the finishing process by filling the wrench grooves 82 to form the prosthesis filling part in the wrench grooves 82 Use of hygienic implants by avoiding pinching in the grooves (82) It may be possible.

In addition, when the length of the loosening prevention bolt 70 is configured to be larger than the length from the top of the head portion 31 of the connection screw 30 to the top of the second female threaded portion 62 of the crown 60, the loosening When the bolts 70 are sequentially screwed into the second female threaded portion 62 of the crown 60 and the female threaded portion 53a of the screw insertion hole 53, the tightening bolts are completely tightened, the upper end of the loosening prevention bolt 70 is The anti-loosening bolt 70 may be protruded over the second female threaded portion 62 of the crown 60, and the upper end of the anti-loosening bolt 70 protruded over the second female threaded portion 62 of the crown 60. The upper end of the anti-loosening bolt 70 may be flush with the upper end of the second female threaded part 62 without protruding from the second female threaded part 62 of the crown 60.

As such, the present invention and the upper end of the connection screw 30 to the abutment 50 and the crown 60 to prevent loosening of the connection screw 30 for fixing the abutment 50 and the fixture 10 As a configuration for screwing the loosening prevention bolt 70 in close contact, the connection screw 30 can maintain a firm coupling state of the abutment 50 and the fixture 10 without being loosened by external impact or vibration. Therefore, the service life of the implant assembly is improved, and maintenance costs can be reduced by increasing the maintenance interval for the implant as compared to the conventional, as well as the abutment 50 and the crown 60, the anti-loosening bolt 70 By being coupled to each other by the), it is possible to further enhance the durability of the overall implant assembly by further solidifying the coupling state of the crown 60 to the abutment (50).

In addition, the anti-loosening bolt 70 in the present invention may be made of various materials, the anti-loosening bolt 70 of the present invention is harmless to the body PMMA (poly methyl metha acrylate, polymethacrylate) -based material, peek (Poly Ether Ether Ketone) material, titanium material, chromium cobalt material, peek & pmma (Poly Ether Ether Ketone & poly methyl metha acrylate) material, and if made of these materials, the bottom of the loosening prevention bolt (70) connection screw When tightened to be in close contact with the upper end of the 30, while preventing the damage of the upper end of the connection screw 30, that is, the head of the connection screw 30, the connection screw 30 can be further prevented from loosening by external vibration.

In addition, the anti-loosening bolt 70 of the present invention is harmless to human body polymethyl metha acrylate (PMMA) -based material, peek (Poly Ether Ether Ketone) material, titanium material, chromium cobalt material, peek & pmma (Poly Ether) Ether Ketone & poly methyl metha acrylate) material, the anti-loosening bolt 70 is sequentially provided to the second female threaded portion 62 of the crown 60 and the female threaded portion 53a of the screw insertion hole 53. In the state that the screw is fully tightened, when the upper end of the anti-loosening bolt 70 protrudes above the second female threaded portion 62 of the crown 60, the anti-loosening bolt 70 of the second female threaded portion 62 The upper end of the anti-loosening bolt 70 can be easily cut so as not to protrude upward from the upper end so that the upper end of the anti-loosening ball 70 is flush with the upper end of the second female threaded part 62 of the crown 60. have.

While the invention has been shown and described in connection with preferred embodiments for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is illustrated and described. Rather, those skilled in the art will appreciate that many changes and modifications can be made to the present invention without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes, modifications, and equivalents should be considered to be within the scope of the present invention.

10 ... fixtures
13.Screw tightening hole
30.Connection thread
31.Head
33.Thread
50 ... abutment
51.Thread passing hole
52.
53.Screw Insertion
53a, 62 ... Female thread
70 ... Loosen bolt

Claims (3)

An implant assembly comprising a fixture implanted in an alveolar bone and having a screw fastening hole formed at an upper center thereof, an abutment placed on an upper portion of the fixture and coupled by a connection screw, and a crown covered and fixed to the abutment,
The abutment is formed with a screw through hole through which the connection screw passes to the screw fastening hole in the lower portion, and connected to the screw through hole on the upper portion, and allows the connection screw to be inserted into the screw through hole. An insertion hole is formed, and the connection screw is inserted through the screw insertion hole and passed through the screw through hole to be screwed into the screw fastening hole, so that the abutment is fixed to the fixture.
The inner circumferential surface of the screw insertion hole is configured to form a first female threaded portion formed with a thread,
The crown is formed through the upper and lower through the screw insertion hole, the inner threaded surface is provided with a second female threaded threaded portion,
It is further screwed to the second female threaded portion and the first female threaded portion in order to be in close contact with the upper end of the connection screw, the anti-loosening bolt made of a tannery bolt to prevent the connection screw from loosening;
The loosening prevention bolt has a length from the upper end of the connecting screw to the upper end of the second female threaded thread in the state in which the connection screw is inserted into the screw insertion hole and screwed to the fixture. It is configured to fill the entire region of the first female screw thread and the second female screw thread,
The anti-loosening bolt is an implant assembly, characterized in that made of poly methyl metha acrylate (PMMA) or poly ether ether ketone (peek) material.


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