KR102002752B1 - Improved implant assembly with screw loosening prevention fucntion - Google Patents

Abstract

Disclosed by the present invention is an implant assembly having an unscrewing prevention function. The implant assembly comprises: a fixture which is implanted on alveolar bone and has a screw fastening hole formed in the upper center thereof; an abutment which is placed on the upper part of the fixture and is coupled by a connection screw; and a crown which is fixated and installed by being covered on the abutment. The abutment has a screw through hole formed to be penetrated by the connection screw at a lower part to be coupled to the screw fastening hole by screw; a screw insertion hole is formed to be connected with the screw through hole at an upper part so that the connection screw is inserted into the screw through hole; and the abutment is formed to be coupled and fixated on the fixture as the connection screw is inserted through the screw insertion hole and passes through the screw through hole to be screwed with the screw fastening hole. The implant assembly having an unscrewing prevention function disclosed by the present invention: is formed to have a first female screw thread unit having a screw thread on the inner circumference surface of the screw insertion hole; and more includes a first loosening prevention bolt which is screwed with the first female screw thread unit so that a lower end of the first loosening prevention bolt comes into close contact with the upper end of the connection screw and thus, prevents the connection screw from loosening.

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 an 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.
<Prior art document 1> Patent No. 10-1173758
<Prior art document 2> Patent No. 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 A first threaded thread formed on the surface is formed to form a first female threaded portion, the lower end is screwed to the first female threaded portion to be in close contact with the upper end of the connection screw, the first loosening bolt for preventing the connection screw from loosening; It further comprises.

The first loosening bolt may have a length from an upper end of the connecting screw to an upper end of the screw insertion hole in a state in which the connection screw is inserted into the screw insertion hole and screwed to the fixture.

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 thread, the second female threaded threaded portion, the lower end is in close contact with the upper end of the first loosening bolt It may be configured to further include; the connection screw and the second loosening bolt for preventing the first loosening bolt to be released.

The first anti-loosening bolt and the second anti-loosening bolt may be configured to be made of tanned bolts.

On the other hand, the implant assembly having a screw loosening prevention function of the present invention is implanted in the alveolar bone and a 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, the abutment In the implant assembly consisting of a crown that is fixed to the installation is fixed to the abutment, the abutment is passed through the connection screw is formed with a screw through hole for screwing into the screw fastening hole, the connection screw passes through the screw through hole And the abutment is fixed to the fixture by being screwed into the screw fastening hole, the crown is formed up and down to be connected to the screw through hole, and is configured to have a female threaded thread formed on the inner circumferential surface thereof. , Screwing the female threaded portion so that the lower end is in close contact with the upper end of the connection screw It may be configured to further include a loosening prevention bolt for preventing the connection screw is loosened.

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 particular, in the present invention, when the first abutment bolt is installed in close contact with the connection screw, the abutment, the crown is provided with a structure to install a second bolt to prevent contact with the first bolt to prevent loosening, the first The anti-loosening bolt and the second anti-loosening bolt prevent the loosening of the connecting screw in a double way, and it is effective to reliably bind the abutment and the fixture for a long time.

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,
Figure 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,
Figure 4 is an exploded cross-sectional view of each component of the implant assembly having a screw loosening prevention function according to a third embodiment of the present invention in a separated state,
5 is a cross-sectional view showing an implant assembly having a screw loosening prevention function according to a third 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 wrench wrench 72 of a hexagon for operating with a wrench on 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 according to the second embodiment is configured such that the center of the crown 60 penetrates up and down and the second female threaded portion 62 is formed on the inner circumferential surface of the implant assembly according to the second embodiment. There is a difference only in that it further includes a configuration of the second fastening preventing bolt 80 is screwed, in the rest of the configuration is the same as the first embodiment, the same reference numerals for the same configuration and the description is omitted, the difference is Only the configurations that exist are described. Here, the second anti-loosening bolt 80 may be made of the same wrench-type tannery bolts and the anti-loosening bolt 70.

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

In the same manner as in the first embodiment, the abutment 50 is fixed to the upper portion of the fixture 10 using the connection screw 30, and the anti-loosening bolt 70 is the female threaded portion of the screw insertion hole 53. After screwing into the 53a, the abutment 50 may be fixed by covering the crown 60 with an adhesive, and then, as shown in FIG. 3, the second female threaded portion 62 of the crown 60. The assembly of the implant assembly can be completed by screwing and tightening the second loosening bolt 80 with a hexagon wrench.

As described above, in the second embodiment, the second anti-loosening bolt 80 is fastened to the second female threaded portion 62 of the crown 60 so that the lower end of the second anti-loosening bolt 80 is formed of the anti-loosening bolt 70. By being in close contact with the upper end, the anti-loosening bolt 70 not only prevents loosening of the connection screw 30, but also the second anti-loosening bolt 80 restricts the shanghai of the anti-loosening bolt 70 to prevent loosening bolts. By limiting the loosening of the 70, the loosening of the connection screw 30 can be further prevented.

On the other hand, in the second embodiment, the length of the second loosening bolt 80 has the same length as the entire upper and lower lengths of the second female threaded portion 62, so that the second loosened bolt 80 is the second female threaded portion 62. It is preferably configured to be assembled in a form that completely fills.

In addition, in this embodiment, the upper surface of the second anti-loosening bolt 80 is exposed to the outside to form the outer surface of the crown 40 is in contact with the food during chewing, at this time, the upper of the second anti-loosening bolt 80 Food waste may be inserted into the wrench grooves 82 formed in the wrench grooves 82 to cause germs to grow. Therefore, although not shown in the present embodiment, the second loosening bolt 80 may be formed by the second female threaded portion 62. In the state where the fastening is completed, the wrench grooves 82 are filled with a resin, amalgam, gold, and a ceramic prosthetic filler to finish the treatment by forming a prosthetic filler in the wrench grooves 82 so that the food waste may be wrenched. The hygienic implant can be enabled by not being pinched in the grooves 82.

On the other hand, the implant assembly (1, 1 ') having a screw loosening prevention function of the first and second embodiments of the present invention shown in Figures 2 and 3 is screwed into the upper central axis of the abutment 50 The ball 53 is formed, and the screw insertion hole 53 is formed in the form of the female threaded portion (53a), the fixture 10, the abutment 50 and the crown 60 each as a separate component Composed of the fixture 10 and the abutment 50 to the upper portion of the fixture (10) by raising the abutment 50, the connection screw 30, the abutment prevention bolt 70 to the abutment (50) After assembling), it is configured to be coupled in a manner of fixing the crown 60 to the abutment 50 with an adhesive or the like, but the implant assembly according to the third embodiment of the present invention shown in Figures 4 and 5 (1 '') the abutment 50 'is shorter than the first and second embodiments and the abutment 50' is lower than the crown 60 '. It consisted in a one-piece, the components, which can be configured to accomplish a two-piece means that the fixture 10 and the abutment piece crown (60 ').

At this time, the abutment 50 ′ has only a through hole 51 having a stepped portion 52 formed thereon on the central axis, and a through hole 61 connected to the through hole 51 in the crown 60. The female screw thread part 62 'is formed on ().

In the implant assembly according to the third embodiment of the present invention, as shown in FIGS. 4 and 5, in the state in which the fixture 10 is placed in the alveolar bone, the fixture 60 is integrated into the crown 60. 10) After inserting the connecting screw 30 through the through hole 61 of the crown (60 ') and screwed into the screwing hole 13 of the fixture 10, and then loosening bolt ( The anti-loosening bolt 80 may be screwed onto the female threaded portion 62 'such that the lower end of the 80 is in close contact with the upper end of the connecting screw 30.

Accordingly, even if the connection screw 30 tries to rotate in the release direction due to external factors such as external shock or vibration, the release preventing bolt 80 restricts the upward movement due to the loosening of the connection screw 30. Loosening of the connecting screw 30 can be prevented.

The length of the anti-loosening bolt 80 of the third embodiment is combined and assembled with the fixture 10 and the abutment 50 'by the connecting screw 30, and the crown 60 of the abutment 50' In the fixed state attached to the upper end, the upper end of the connection screw 30, that is, the length of the head 31 from the upper end of the head portion 31 of the connection screw 30, the length of the female threaded portion 62, the loosening prevention bolt 80 is a female thread It is preferably configured to be assembled in a form that fills the entire region of the peak 62. In addition, the wrench groove 82 of the anti-loosening bolt 80 may be formed with a prosthetic filling part filled with a prosthetic filler such as resin, amalgam, gold, and ceramic.

As such, the present invention provides a connection of the connection screw 30 to the abutment 50 or / and the crown 60 to prevent loosening of the connection screw 30 for fixing the abutment 50 and the fixture 10. The anti-loosening bolts 70 and 80 which are in close contact with the upper end are screwed together, and the connection screw 30 is not loosened by external shock or vibration, and the abutment 50 and the fixture 10 are firmly coupled to each other. This can improve the service life of the implant assembly, and reduce the maintenance cost by increasing the maintenance interval for the implant compared to the conventional.

In addition, the anti-loosening bolts 70 and 80 in the present invention may be made of various materials, but the anti-loosening bolts 70 and 80 of the present invention are PMMA (poly methyl methacrylate) -based materials that are harmless to humans. , Titanium material, chromium cobalt material, peek & pmma (Poly Ether Ether Ketone & poly methyl metha acrylate) may be made of any one material, if made of these materials, the bottom of the loosening bolts (70, 80) is the connection screw (30) When tightened to be in close contact with the upper end of the connection screw 30, that is, while preventing the damage of the head of the connection screw 30, the connection screw 30 can be further prevented from loosening by external vibration.

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
70,80 ... Loosen bolt

Claims (5)

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,
And a first loosening bolt made of a tannery bolt which is screwed into the first female threaded portion so that a lower end is in close contact with an upper end of the connecting screw, thereby preventing the connecting screw from being loosened.
The first loosening bolt has a length from the upper end of the connecting screw to the upper end of the screw insertion hole in the state in which the connection screw is inserted into the screw insertion hole and screwed to the fixture. The prevention bolt is configured to completely fill the entire area of the screw insertion hole,
The first anti-loosening bolt is implant assembly, characterized in that made of poly methyl metha acrylate (PMMA) or poly ether ether ketone (peek) material.
delete The method of claim 1,
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,
And a second loosening bolt which is screwed into the second female threaded portion, the lower end of which is in close contact with an upper end of the first loosening bolt to prevent the connection screw and the first loosening bolt from being loosened. Implant assembly.
The method of claim 3, wherein
The second loosening bolt is an implant assembly, characterized in that consisting of tanned bolts.
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 is passed through the screw fastening hole is formed, the connection screw is passed through the screw through hole and screwed into the screw fastening hole, the abutment Is configured to be fixed to the fixture,
The crown is formed in the upper and lower passages to be connected to the screw through hole, it is configured to be provided with a female threaded thread formed on the inner peripheral surface,
A screw is fastened to the female threaded portion so that the lower end is 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 length of the anti-loosening bolt is composed of a length from the top of the connection screw to the top of the female threaded portion, the loosening bolt is configured to fill the entire area of the female threaded portion,
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.

Images