WO2020184786A1

WO2020184786A1 - Implant assembly having screw loosening prevention function

Info

Publication number: WO2020184786A1
Application number: PCT/KR2019/008727
Authority: WO
Inventors: 나영성
Original assignee: 나영성
Priority date: 2019-03-11
Filing date: 2019-07-15
Publication date: 2020-09-17

Abstract

Disclosed is an implant assembly having a screw loosening prevention function. The disclosed implant assembly having a screw loosening prevention function comprises: a fixture implanted in an alveolar bone, a screw fastening hole being formed at the center of the upper end of the fixture; an abutment placed on the upper portion of the fixture and coupled by a connection screw; and a crown fixedly installed to cover the abutment. The abutment has a screw passage hole formed in the lower portion thereof such that the connection screw passes through same and is screw-fastened to the screw fastening hole. The abutment has a screw insertion hole formed in the upper portion thereof and connected to the screw passage hole such that the connection screw is inserted into the screw passage hole. Accordingly, the connection screw is inserted through the screw insertion hole, passes through the screw passage hole, and is screw-fastened to the screw fastening hole, thereby coupling/fixing the abutment to the fixture. A first female thread portion having a thread formed thereon is formed on the inner peripheral surface of the screw insertion hole. The implant assembly further comprises a first loosening prevention bolt which is screw-fastened to the first female thread portion such that the lower end thereof is forced against the upper end of the connection screw, thereby preventing the connection screw from loosening.

Description

Implant assembly with screw loosening prevention function

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

In general, in the past, crowns, bridges, dentures, etc. have been used when a tooth is removed, but implants are widely used recently as a method to solve the problems of the conventional method.

The implant assembly for such an implant procedure includes a fixture 10 that is placed in the alveolar bone as shown in FIG. 1, an abutment 20 fixed through a connection screw 30 on the upper portion of the fixture 10, and an abutment. It is configured to include a crown 40 as a prosthesis that is attached and fixed with an adhesive or the like by covering the top of the 20.

When explaining the coupling of the fixture 10 and the abutment 20, the abutment 20 is provided with a screw insertion port 22 having a hook portion 24 on a central axis thereof, so that the abutment After placing (20) on the fixture (10), the connection screw (30) is inserted through the screw insertion port (22), so that the connection screw (30) protrudes to the lower portion of the abutment (20), and 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, the conventional implant assembly as shown in FIG. 1 is a state in which the abutment 20 and the fixture 10 are coupled through the connection screw 30, and the upper space s of the screw insertion port 22 is empty. Therefore, if a long time passes after the implant procedure, the connecting screw 30 is loosened due to external factors such as vibration or shock, and the degree of coupling between the abutment 20 and the fixture 10 decreases, and the crown 40 ) There was a problem such as shaking, and accordingly, visit the dentist periodically to re-tighten the connection screw 30, or to replace the abutment 20 and the crown 40 with new ones, etc. There is a hassle of having to perform maintenance, and as maintenance is performed in such a short cycle, the cost for maintenance also increases, which is very burdensome to the user.

<Prior Technical Document 1> Registered Patent No. 10-1173758

<Prior Technical Document 2> Registered Patent No. 10-1953301

The present invention was invented to solve the conventional problems as described above, and prevents loosening of the connection screw that connects the fixture and the abutment, thereby improving the service life and prolonging the maintenance period for the implant to be used semi-permanently. The purpose is to provide an implant assembly with a function to prevent screw loosening so that

The implant assembly having a screw loosening prevention function of the present invention for achieving the above object includes a fixture that is placed in the alveolar bone and has a screw fastening hole in the center of the upper end, and an abutment placed on the top of the fixture and coupled by a connecting screw. , In the implant assembly consisting of a crown covered and fixedly installed on the abutment, wherein the abutment has a screw through hole through which the connection screw passes through the screw fastening hole to be screwed into the screw fastening hole, and the upper A screw insertion hole is formed that is connected to the screw through hole and allows the connection screw to be inserted into the screw through hole, so that the connection screw is inserted through the screw insertion hole, passed through the screw through hole, and screwed into the screw fastening hole. The abutment is configured to be coupled and fixed to the fixture, and a first female threaded portion having a threaded thread is formed on the inner circumferential surface of the screw insertion hole, and the first female threaded portion is in close contact with the upper end of the connection screw. It characterized in that it further comprises a; screw fastened, the first loosening prevention bolt for preventing the connection screw from loosening.

The length of the first anti-loosening bolt may be configured to be a length from the upper end of the connection screw to the upper end of the screw insertion hole in a state where the connection screw is inserted into the screw insertion hole and screwed into the fixture. have.

The crown is provided with a second female threaded portion formed with a thread on the inner circumferential surface thereof and formed through the top and bottom to be connected to the screw insertion hole, and is screwed to the second female threaded portion, and the lower end is in close contact with the upper end of the first loosening prevention bolt. It may be configured to further include a second loosening prevention bolt that prevents the connection screw and the first loosening prevention bolt from being loosened.

The first anti-loosening bolt and the second anti-loosening bolt may be formed of a tanned bolt.

The crown is provided with a second female screw thread formed in the upper and lower ends to be connected to the screw insertion hole, and a threaded portion is formed on an inner circumferential surface thereof, and the first loosening prevention bolt includes the second female screw thread so that the lower end is in close contact with the upper end of the connection screw. It may be configured to be sequentially fastened to the first female threaded portion to prevent the connection screw from being loosened.

The length of the first anti-loosening bolt is configured to be a length from the upper end of the connection screw to the upper end of the second female threaded portion in a state in which the connection screw is inserted into the screw insertion hole and screwed into the fixture. I can.

The first anti-loosening bolt may be configured to be made of a tanning bolt.

On the other hand, the implant assembly having a screw loosening prevention function of the present invention is placed in the alveolar bone and has a screw fastening hole formed in the center of the top, an abutment placed on the top of the fixture and coupled by a connecting screw, and the abutment In the implant assembly consisting of a crown covered and fixedly installed, the abutment has a screw through hole through which the connection screw is passed and screwed into the screw fastening hole, and the connection screw passes through the screw through hole. The abutment is configured to be coupled and fixed to the fixture by being screwed into the screw fastening hole, and the crown is formed to pass through up and down so as to be connected to the screw through hole, and is configured to have a female threaded portion having a thread formed on the inner circumferential surface. It may be configured to further include a screw fastening to the female threaded portion so that the lower end is in close contact with the upper end of the connection screw, to prevent loosening of the connection screw.

According to the above, the implant assembly having the screw loosening prevention function of the present invention is a configuration in which the loosening prevention 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 that fixes the abutment and the fixture. , Since the connection screw is not loosened even by external factors such as external shock or vibration, it is possible to maintain a firm connection between the abutment and the fixture, and accordingly, the service life of the implant can be greatly improved, so that the implant is semi-permanently Can be used, and it has the effect of reducing maintenance costs by extending the maintenance cycle for the implant.

In addition, in the present invention, in a state in which the abutment and the fixture are fixed with a connecting screw, an empty space is not formed above the screw insertion hole of the abutment, and the loosening prevention bolt is screwed into the screw insertion hole and assembled in a filled form. , Food, etc. do not enter the screw insertion hole of the abutment, so there is an effect that prevents the occurrence of odor due to food jamming.

In addition, in the present invention, when the abutment is configured with a structure in which a first loosening prevention bolt in close contact with the connection screw is installed, and a second loosening prevention bolt in close contact with the first loosening prevention bolt is installed on the crown, the first The loosening-preventing bolt and the second loosening-preventing bolt prevent loosening of the connecting screw double, so it has the effect of keeping the abutment and the fixture solid for a long time and stably.

In addition, the present invention forms a second female threaded portion having a screw thread formed on the inner circumferential surface and penetrating up and down the crown to be connected to the screw insertion hole, and sequentially screwing one loosening prevention bolt to the female thread portion of the second female thread portion and the screw insertion hole When configured to tighten, the lower end of the pulley prevention bolt is in close contact with the upper end of the connection screw to prevent loosening of the connection screw, and the combination of the abutment and the crown is strengthened by the loosening prevention bolt. There is an effect that the durability of the can be further improved.

1 is a cross-sectional view showing a coupling structure of a general implant assembly,

2 is a combined cross-sectional view showing the implant assembly having a screw loosening prevention function according to the first embodiment of the present invention,

3 is a combined cross-sectional view showing an implant assembly having a screw loosening prevention function according to a second embodiment of the present invention,

4 is a separated cross-sectional view 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 combined cross-sectional view showing an implant assembly having a screw loosening prevention function according to a third embodiment of the present invention,

6 is a combined cross-sectional view showing an implant assembly having a screw loosening prevention function according to a fourth embodiment of the present invention.

The above objects, other objects, features, and advantages of the present invention will be easily understood through the following preferred embodiments related to 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 disclosed content may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

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

Embodiments described in the present specification 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 description of technical content. Accordingly, the shape of the exemplary diagram may be modified by manufacturing technology and/or tolerance. Accordingly, embodiments of the present invention are not limited to the specific form shown, but also include a change in form generated according to a manufacturing process. For example, the etched area shown at a right angle may be rounded or may have a shape having a predetermined curvature. Accordingly, the regions illustrated in the drawings have properties, and the shapes of the regions illustrated in the drawings are for exemplifying a specific shape of the region of the device and are not intended to limit the scope of the invention. In various embodiments of the present specification, terms such as first and second are used to describe various components, but these components should not be limited by these terms. These terms are only used to distinguish one component from another component. The embodiments described and illustrated herein also include complementary embodiments thereof.

The terms used in this specification are for describing exemplary embodiments, and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, "comprises" and/or "comprising" does not exclude the presence or addition of one or more other elements.

In describing the specific embodiments below, a number of specific contents have been prepared to explain the invention in more detail and to aid understanding. However, readers who have knowledge in this field to the extent that they can understand the present invention can recognize that it can be used without these various specific contents. In some cases, it is mentioned in advance that parts that are commonly known in describing the invention and are not largely related to the invention are not described in order to prevent confusion without any reason in describing the invention.

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

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

The fixture 10 is configured to be the same as a conventional fixture, and is configured to form a screw fastening hole 13 in the form of a female thread to which the connection screw 30 is fastened at the center of the upper end.

In the abutment 50, a connection screw 30 is inserted into the central axis in the lower part and protrudes to the lower part of the abutment 50 to form a screw through hole 51 for screwing into the screw fastening hole 13 And, the upper portion is connected to the screw through hole 51 by the 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 diameter larger than that of the head portion 31 of the connection screw 30, and the screw-through hole 51 is larger in diameter than the thread portion 33 of the connection screw 30 and the head portion ( It is configured to have a diameter smaller than that of 31, and a stepped portion 52 is formed between the screw insertion hole 53 and the screw passage hole 51.

With the above configuration, after inserting the connection screw 30 through the open upper portion of the screw insertion hole 53, the screw portion 31 to pass through the screw passage hole 51, and then the head of the connection screw 30 By screwing and tightening the threaded portion 33 of the connecting screw 30 into the screwing hole 13 of the fixture 10 until the 31 is caught in the stepped portion 52, the fixture 10 The abutment 50 may be firmly fixed to the upper part.

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

The female threaded portion 53a may be formed over the entire length of the screw insertion hole 53, or may be configured to form only part of the upper side of the screw insertion hole 53.

The loosening-preventing bolt 70 is made of a headless bolt, that is, a wrench headless bolt formed with a hexagonal wrench groove 72 for operation with a wrench at the top without the head of the bolt, and a female threaded portion formed in the screw insertion hole 53 ( 53a) is configured to be screwed.

When the loosening-preventing bolt 70 is fastened to the female threaded portion 53 of the screw insertion hole 53 until it is completely tightened, the loosening-preventing bolt 70 at the upper end of the connecting screw 30, that is, the upper end of the head portion 31 The lower end of) is in close contact, so that the connection screw 30 can be prevented from being released from the screw fastening hole 13 due to external vibration or shock.

In the present invention, the length of the anti-loosening bolt 70 is in a state in which the fixture 10 and the abutment 50 are coupled through the connection screw 30, and the screw is inserted from the top of the head part 31 of the connection screw 30. It is preferable that it is configured to be equal to or greater than the length to the top of the ball 53.

In this case, when the loosening prevention 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 and is empty. When a space is not generated, and in this state, when the crown 60 is attached and fixed with an adhesive so that it is covered on the top of the abutment 50, the inner surface of the crown 60 is the upper end of the loosening prevention bolt 70 By being in close contact with, it is possible to further prevent the connection screw 30 from being released from the screw fastening hole 13 due to external vibration or impact.

In addition, when the length of the loosening prevention bolt 70 is configured to be greater 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 loosening prevention bolt 70 is screwed When screwed into the female threaded portion 53 of the ball 53 and fully tightened, the top of the loosening prevention bolt 70 can protrude above the screw insertion hole 53, and prevent loosening protruding through the screw insertion hole 53 By cutting the top of the bolt 70, the loosening prevention bolt 70 does not protrude upward from the top of the screw insertion hole 53, and the top of the loosening prevention bolt 70 is the same height as the top of the screw insertion hole 53 Can be.

On the other hand, in the present invention, the loosening prevention bolt 70 is composed of one, and is screwed into the screw insertion hole 53 to be filled in the entire screw insertion hole 53, but is not limited thereto, and the loosening prevention bolt It goes without saying that 70 is composed of a plurality of at least two, so that the plurality of anti-loosening bolts are sequentially screwed into the screw insertion holes 53 so as to completely fill the screw insertion holes 53. . That is, when the anti-loosening bolt 70 is composed of a plurality, the sum of the total lengths of the plurality of anti-loosening bolts is the length from the upper end of the head portion 31 of the connection screw 30 to the upper end of the screw insertion hole 53 Consisting of the same or larger size, when a plurality of loosening prevention bolts are sequentially screwed into the screw insertion hole 53, the entire area of the screw insertion hole 53 is completely filled by a plurality of loosening prevention bolts, thereby creating a void. It can be configured not to be.

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

Compared to the first embodiment, the implant assembly according to the second embodiment is configured such that the center of the crown 60 is vertically penetrated and a second female threaded portion 62 is formed on the inner circumferential surface, and the second female threaded portion 62 There is a difference only in that it further includes the configuration of the second anti-loosening bolt 80 to be screwed, and the remaining configurations are the same as in the first embodiment, so the same reference numerals are assigned to the same configurations, and descriptions are omitted, and the difference is Only the configuration that exists will be described. Here, the second loosening prevention bolt 80 may be formed of the same wrench-type tanning bolt as the loosening prevention bolt 70.

The crown 60 is formed with a second female threaded portion 62 that penetrates 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 coupled and fixed to the upper portion of the fixture 10 using the connecting screw 30, and the loosening prevention bolt 70 is inserted into the female threaded portion of the screw insertion hole 53. After screwing in (53a), it can be fixed by covering the crown 60 with an adhesive on the top of the abutment 50, and then, as shown in FIG. 3, the second female threaded portion 62 of the crown 60 The assembly of the implant assembly may be completed by screwing and tightening the second anti-loosening bolt 80 with a hexagon wrench.

As such, in the second embodiment, by fastening the second anti-loosening bolt 80 to the second female threaded portion 62 of the crown 60, the lower end of the second anti-loosening bolt 80 is By making it in close contact with the top, the loosening prevention bolt 70 not only prevents loosening of the connection screw 30, but also the second loosening prevention bolt 80 restricts the upward movement of the loosening prevention bolt 70 By limiting the loosening of the 70, it is possible to further prevent the loosening of the connecting screw 30.

On the other hand, in the second embodiment, the length of the second anti-loosening bolt 80 is the same as the entire length of the upper and lower threads of the second female threaded portion 62, so that the second loosening prevention bolt 80 is the second female threaded portion 62. It is preferable to be 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 so as to form the outer surface of the crown 40 to contact food during the mastication movement, and at this time, the upper end of the second anti-loosening bolt 80 Since food wastes, etc., are caught in the wrench groove 82 formed in, causing the propagation of bacteria, so that hygiene may be poor, although not shown in the present embodiment, the second loosening prevention bolt 80 is attached to the second female threaded part 62 ), the wrench groove 82 is filled with a prosthetic filler such as resin, amalgam, gold, ceramic, etc., and then finished to form a prosthetic filling part in the wrench groove 82, so that food waste is removed from the wrench. It is possible to use a hygienic implant by not being pinched in the groove 82.

On the other hand, the implant assemblies (1, 1') having a screw loosening prevention function of the first and second embodiments of the present invention shown in FIGS. 2 and 3 are screwed into the upper central axis of the abutment 50 A hole 53 is formed, and a female threaded portion 53a is formed in the screw insertion hole 53, and the fixture 10, abutment 50, and crown 60 are each separate component. Consisting of, by raising the abutment 50 on the upper part of the fixture 10, the fixture 10 and the abutment 50 are coupled with the connection screw 30, and the loosening prevention bolt 70 is attached to the abutment 50 ), and then the crown 60 is fixed 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 FIGS. 4 and 5 (1'') means that the abutment 50' is formed in a shorter shape compared to the first and second embodiments, and the abutment 50' is integrally configured at the lower end of the crown 60', so that the components are It may be configured to consist of two pieces, that is, the fixture 10 and the abutment-integrated crown 60'.

At this time, the abutment 50 ′ has only the screw passage hole 51 provided with the stepped portion 52 on the central axis, and the through hole 61 connected to the screw passage hole 51 in the crown 60 ) Is configured to form a female threaded portion 62'.

In the implant assembly according to the third embodiment of the present invention, as shown in FIGS. 4 and 5, in a state in which the fixture 10 is placed in the alveolar bone, the abutment 50 ′ is integrated with the crown 60 as a fixture ( 10) After placing it on the top, insert the connection screw 30 through the through hole 61 of the crown 60' and screw it into the screw fastening hole 13 of the fixture 10, and then tighten the bolt to prevent loosening ( The loosening prevention bolt 80 can be screwed into the female threaded portion 62' so that the lower end of the 80) is in close contact with the upper end of the connection screw 30.

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

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

As such, the present invention is to prevent loosening of the connection screw 30 for fixing the abutment 50 and the fixture 10 to the abutment 50 or/and the crown 60 of the connection screw 30 A configuration in which the anti-loosening bolts (70, 80) in close contact with the top 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 It is possible to maintain the implant assembly, the service life of the implant assembly is improved, and the maintenance cycle for the implant is increased compared to the previous one, thereby reducing maintenance costs.

In addition, in the present invention, the

anti-loosening bolts

70 and 80 may be made of various materials, but the

anti-loosening bolts

70 and 80 of the present invention are polymethyl methacrylate (PMMA)-based materials that are harmless to the human body. , peek (Poly Ether Ether Ketone) material, titanium material, chromium cobalt material, peek & pmma (Poly Ether Ether Ketone & poly methyl metha acrylate) material can be made of any one of the material, if made of such a material, loosening prevention bolts (70,80 When the lower end of) is tightened to be in close contact with the upper end of the connection screw 30, the upper end of the connection screw 30, that is, the head of the connection screw 30 is prevented from being damaged while the connection screw 30 is released by external vibration. Can be prevented further.

Hereinafter, an implant assembly 1 ″′ having a screw loosening prevention function according to a fourth embodiment of the present invention will be described with reference to FIG. 6.

Compared to the implant assembly of the first embodiment, the implant assembly 1 ″′ according to the fourth embodiment has a second female threaded portion 62 whose center is vertically penetrated through the crown 60 and has a thread formed on the inner circumferential surface thereof, There is a difference only in that the loosening prevention bolt 70 is formed to be long to be fastened together with the female threaded portion 53a of the screw insertion hole 53 and the second female threaded portion 62, and the rest of the configuration is the same as in the first embodiment. For the same configuration, the same reference numerals are assigned and the description is omitted, and only the configurations with differences will be described.

The abutment 50 is bonded and fixed to the upper part of the fixture 10 using the connection screw 30, and the crown 60 is covered with an adhesive on the upper part of the abutment 50 and fixed, as shown in FIG. When screwing the anti-loosening bolt 70 through the second female threaded portion 62 of the crown 60 with a hexagonal wrench, the loosening prevention bolt 70 is formed between the second female threaded portion 62 and the screw insertion hole 53. It can be sequentially screwed to the female threaded portion 53a, and accordingly, the lower end of the loosening prevention 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, and external vibration or impact By this, it is possible to prevent the connection screw 30 from being loosened from the screw fastening hole 13.

In this embodiment, the length of the anti-loosening bolt 70 is coupled to the fixture 10 and the abutment 50 through the connection screw 30, and the crown 60 is covered on the top of the abutment 50 It is preferably configured to be equal to or greater than the length from the upper end of the head portion 31 of the connecting screw 30 to the upper end of the second female threaded portion 62 of the crown 60 in the fixed state.

When the length of the locking bolt 70 is configured to be the same as 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 loosening prevention 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 insertion hole 52 The entire area of) is completely filled by the anti-loosening bolt 70 so that no empty space is generated.

However, if the length of the loosening prevention bolt 70 is configured to be the same as 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, loosening When the prevention bolt 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 top surface of the loosening prevention bolt 70 is crowned. Since it is exposed to the outside so as to form the outer surface of (60), food, etc. may be caught in the wrench groove 72 during the mastication movement, causing the propagation of bacteria, which may lead to poor hygiene, although not shown in the present embodiment, In the state that the fastening of (70) is completed, the wrench groove (72) is filled with a prosthetic filler such as resin, amalgam, gold, ceramic, etc., and processed to form a prosthetic filling part in the wrench groove (82). It is possible to use a hygienic implant by not being pinched in the groove 82.

In addition, when the length of the loosening prevention bolt 70 is configured to be 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, loosening When the prevention bolt 70 is screwed sequentially to the second female threaded portion 62 of the crown 60 and the female threaded portion 53a of the screw insertion hole 53 and fully tightened, the upper end of the loosening prevention bolt 70 is It can protrude above the second female threaded part 62 of the crown 60, and cut the upper end of the loosening prevention bolt 70 protruding above the second female threaded part 62 of the crown 60 to prevent loosening bolts 70. May not protrude above the second female threaded portion 62 of the crown 60 and the upper end of the loosening prevention bolt 70 may be at the same height as the upper end of the second female threaded portion 62.

As such, the present invention is 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 in which the tightly attached anti-loosening bolt 70 is screwed, the connection screw 30 is not loosened even by external shock or vibration, and the abutment 50 and the fixture 10 can be kept in a solid state of engagement. Therefore, the service life of the implant assembly is improved, and the maintenance cycle for the implant can be increased compared to the previous one to reduce the maintenance cost, as well as the abutment 50 and the crown 60 to prevent loosening bolts (70). ) Is combined with each other, it is possible to help improve the durability of the overall implant assembly by further strengthening the coupling state of the crown 60 to the abutment 50.

In addition, in the present invention, the anti-loosening bolt 70 may be made of a variety of materials, but the anti-loosening bolt 70 of the present invention is a PMMA (poly methyl methacrylate, polymethacrylate)-based material that is harmless to the human body, peek (Poly Ether Ether Ketone) material, titanium material, chromium cobalt material, peek&pmma (Poly Ether Ether Ketone & poly methyl metha acrylate) material, and in the case of such a material, the lower end of the loosening prevention bolt 70 is a connection screw When tightened so as to be in close contact with the upper end of the connection screw 30, while preventing damage to the upper end of the connection screw 30, that is, the head of the connection screw 30, it is possible to further prevent the connection screw 30 from being loosened by external vibration.

In addition, the anti-loosening bolt 70 of the present invention is a PMMA (poly methyl methacrylate, polymethacrylate)-based material that is harmless to the human body, peek (Poly Ether Ether Ketone) material, titanium material, chromium cobalt material, peek & pmma (Poly Ether) Ether Ketone & poly methyl methacrylate) material, so that the loosening bolt 70 is sequentially attached to the second female threaded portion 62 of the crown 60 and the female threaded portion 53a of the screw insertion hole 53. When the upper end of the anti-loosening bolt 70 protrudes above the second female threaded portion 62 of the crown 60 in the state that the screw is fully tightened, the loosening prevention bolt 70 is The upper end of the anti-loosening bolt 70 can be easily cut so that it does not protrude upward from the upper end, so that the upper end of the anti-loosening ball 70 is at the same height as the upper end of the second female threaded portion 62 of the crown 60. have.

As described above, the present invention has been illustrated and described in connection with preferred embodiments for exemplifying the principles of the present invention, but the present invention is not limited to the configuration and operation as shown and described as such. Rather, it will be well understood by those skilled in the art that a number of changes and modifications can be made to the present invention without departing from the spirit and scope of the appended claims. Accordingly, all such appropriate changes and modifications and equivalents should be considered to be within the scope of the present invention.

The present invention as described above can be widely used in the medical-related implant product industry.

10... fixture

13...Screw fastening hole

30... connection screw

31...head part

33...screw part

50...abutment

51...screw hole

52...stepped part

53...screw insertion

53a,62... female thread

70,80... loosening prevention bolt

Claims

In the implant assembly consisting of a fixture that is placed in the alveolar bone and has a screw fastening hole in the center of the upper end, an abutment placed on the top of the fixture and coupled by a connection screw, and a crown covered and fixedly installed on the abutment,

The abutment has a screw through hole through which the connection screw is passed through the lower portion to be screwed into the screw-fastening hole, and a screw through which the connection screw is inserted into the screw through hole is connected to the screw through hole in the upper part An insertion hole is formed so that the connection screw is inserted through the screw insertion hole, passed through the screw through hole, and screwed into the screw fastening hole, so that the abutment is coupled and fixed to the fixture,

The inner circumferential surface of the screw insertion hole is configured to form a first female screw threaded portion,

An implant assembly further comprising: a first anti-loosening bolt that is screwed to the first female threaded portion so that the lower end is in close contact with the upper end of the connection screw, and prevents the connection screw from loosening.
The method of claim 1,

The length of the first anti-loosening bolt is characterized in that consisting of a length from the upper end of the connection screw to the upper end of the screw insertion hole in a state in which the connection screw is inserted into the screw insertion hole and screwed into the fixture. Implant assembly.
The method of claim 1,

The crown is provided with a second female threaded portion formed through the top and bottom to be connected to the screw insertion hole, the inner circumferential surface of which a thread is formed,

And a second anti-loosening bolt screwed to the second female threaded portion and having a lower end in close contact with the upper end of the first anti-loosening bolt to prevent loosening of the connection screw and the first anti-loosening bolt; characterized in that it further comprises Implant assembly.
The method of claim 3,

The first anti-loosening bolt and the second anti-loosening bolt is an implant assembly, characterized in that consisting of a tanning bolt.
The method of claim 1,

The crown is provided with a second female threaded portion formed through the top and bottom to be connected to the screw insertion hole, the inner circumferential surface of which a thread is formed,

The first anti-loosening bolt is sequentially fastened to the second female threaded portion and the first female threaded portion so that the lower end is in close contact with the upper end of the connection screw, the implant assembly configured to prevent the connection screw from loosening.
The method of claim 5,

The length of the first anti-loosening bolt is made of a length from the upper end of the connection screw to the upper end of the second female threaded portion in a state in which the connection screw is inserted into the screw insertion hole and screwed into the fixture. Implant assembly.
The method of claim 6,

The first anti-loosening bolt is an implant assembly, characterized in that consisting of a tanning bolt.
In the implant assembly consisting of a fixture that is placed in the alveolar bone and has a screw fastening hole in the center of the upper end, an abutment placed on the top of the fixture and coupled by a connection screw, and a crown covered and fixedly installed on the abutment,

The abutment has a screw through hole through which the connection screw is passed and screwed into the screw-fastening hole, and the connection screw is passed through the screw through hole and screwed into the screw-fastening hole. Is configured to be coupled and fixed to the fixture,

The crown is configured to be provided with an upper and lower through hole to be connected to the screw through hole, and a female threaded portion having a thread formed on an inner circumference thereof

An implant assembly further comprising a; an anti-loosening bolt that is screwed to the female threaded portion so that the lower end is in close contact with the upper end of the connection screw, and prevents the connection screw from loosening.