KR20170060539A

KR20170060539A - Abutment screw with retention groove

Info

Publication number: KR20170060539A
Application number: KR1020150165104A
Authority: KR
Inventors: 임석주
Original assignee: 임석주
Priority date: 2015-11-24
Filing date: 2015-11-24
Publication date: 2017-06-01

Abstract

The present invention relates to a fastening screw having a release preventing groove formed therein, which comprises a lower fixture (10) placed on a gum and serving as an artificial root, and a lower surface fixed to the lower fixture (10) A fastening screw 30 for fastening the lower fixture 10 to the abutment 20 by being coupled with the lower fixture 10 through the abutment 20; ), Wherein the releasing prevention groove is formed,
The fastening screw 30 has a cylindrical head portion 31 having a driver groove 32 formed on an upper surface thereof, a body portion 35 formed at a lower portion of the head portion 31, And a threaded portion 34 formed on the outer periphery of a part of the threaded portion 34. The threaded portion 34 includes an upper extension portion 34-1 and a lower helical portion 34-2, (33, 36) are formed on the outer circumferential surface of the body part and the outer circumferential surface of the extension part of the screw part (34), respectively.
Therefore, according to the present invention, the abutment and the lower fixture joined by the fastening screw are not easily released by the escape preventing grooves formed in the body portion and the screw portion of the fastening screw, so that the implant can be stably used for a long period of time There is a remarkable effect.

Description

[0002] Abutment screw with retention groove [0003]

The present invention relates to a fastening screw used in an implant, and more particularly, to a fastening screw used in an implant, wherein an abutment and a lower fixture coupled by a fastening screw are formed by the escape preventing grooves respectively formed in the body portion and the screw portion of the fastening screw To a fastening screw having a release preventing groove for preventing the fastening member from being easily released.

Generally, teeth play a role in helping digest food well by grinding or grinding. If these teeth are lost, the food can not be chewed properly and the digestion is not easy, so that not only the food can be freely consumed, but also the nutrient intake is difficult. Thus, teeth have been recognized as an important part of the body since ancient times, and play an important role in maintaining a healthy life. Since human teeth are replaced with permanent teeth once in childhood, new teeth are not created when teeth are lost. Therefore, dentistry restores lost teeth and surrounding tissues through prosthetic treatment, .

In general, an implant used as an artificial substitute of a natural tooth is composed of three parts: a fixture corresponding to an artificial root, an abutment corresponding to an abutment, and an artificial tooth. A fixture is a fixture that is implanted in the alveolar bone of a missing tooth area like the root of a natural tooth to support an artificial tooth. The abutment is also called an abutment tooth, which is attached to the gum to connect the fixture, which is planted in the alveolar bone, to the artificial tooth.

According to the prior art, according to Registration No. 0-1072274 (Separate Dental Implant), the detachable dental implant includes a lower fixture to be deeply inserted into the alveolar bone, and a lower fixture detachably coupled to the lower fixture, And the upper fixture is connected to the outer circumferential surface to form a tapered annular clearance surface, and the annular clearance surface is filled with the alveolar bone.

As another conventional technique, according to the registered patent publication No. 10-0807290 (detachment mini-implant), the abutment detachable mini-implant has a narrow gum bone width or a space between teeth The present invention relates to an abutment detachable mini-implant which can be used in the case of narrowing, and for this purpose, the present invention is used when a space between teeth is narrow or insufficient, and is formed along the outer side of the fixed body, A first screw thread formed at a predetermined interval from the lower portion of the fixture body toward the upper side to enable the first screw thread to be screwed into the fixture body; A second threaded portion formed on the upper side of the first threaded portion and formed with a double threaded portion so as to be rapidly placed; A third threaded portion formed on the upper side of the second threaded portion and closely spaced between threaded portions; And an insertion groove formed on the circumferential surface of the fixture body so as to be detachable from the upper portion of the fixture body so that the insertion groove and the abutment formed on the circumferential surface are coupled with the drive connector at the upper side of the fixture body, Is provided.

However, the above-described conventional technique has disadvantages that the removable implant can not be used stably for a long period of time because the screw may be loosened or broken.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an abutment and a fixture, which are combined by a fastening screw, So that the fastening screw can be stably used for a long period of time.

The present invention relates to a fastening screw having a release preventing groove formed therein, which comprises a lower fixture (10) placed on a gum and serving as an artificial root, and a lower surface fixed to the lower fixture (10) A fastening screw 30 for fastening the lower fixture 10 to the abutment 20 by being coupled with the lower fixture 10 through the abutment 20; ), Wherein the releasing prevention groove is formed,

The fastening screw 30 has a cylindrical head portion 31 having a driver groove 32 formed on an upper surface thereof, a body portion 35 formed at a lower portion of the head portion 31, And a threaded portion 34 formed on the outer periphery of a part of the threaded portion 34. The threaded portion 34 includes an upper extension portion 34-1 and a lower helical portion 34-2, (33, 36) are formed on the outer circumferential surface of the body part and the outer circumferential surface of the extension part of the screw part (34).

Therefore, according to the present invention, the abutment and the lower fixture joined by the fastening screw are not easily released by the escape preventing grooves formed in the body portion and the screw portion of the fastening screw, so that the implant can be stably used for a long period of time There is a remarkable effect.

1 is an exploded perspective view of an implant structure of the present invention.
2 is a perspective view of the fastening screw of the present invention;
3 is an exploded perspective view of a general implant structure.
4 is a perspective view showing a state in which a general abutment and a fastening screw are combined.
5 is a side cross-sectional view of the coupling of a general implant structure.
Fig. 6 is a view showing the use of a general implant structure. Fig.
7 is a perspective view of a general fastening screw;
8 is a cross-sectional view of a general implant structure.

In addition, the release preventing grooves 33 are formed by being cut by a cutting machine, and are formed in a ring shape, and a plurality of the release preventing grooves 33 are formed at predetermined intervals in the longitudinal direction.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a fastening screw having a release preventing groove according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of the implant structure of the present invention, FIG. 2 is a perspective view of the clamping screw of the present invention, FIG. 3 is an exploded perspective view of a general implant structure, Fig. 6 is a perspective view of a general implant structure, Fig. 7 is a perspective view of a general fastening screw, and Fig. 8 is a cross-sectional view of a general implant structure.

Prior to the description, the same structures as those of the general implant structure shown in FIGS. 3 to 8 are denoted by the same reference numerals in describing the implant structure of the present invention, thereby improving the understanding of the implant structure of the present invention.

The implant structure in which the fastening screw with the release-preventing groove of the present invention is used has a lower fixture that is placed on the gum and acts as an artificial root, and an abutment which is engaged with the lower surface of the lower fixture, And a fastening screw which penetrates through the abutment and is engaged with the lower fixture to thereby join the lower fixture and the abutment.

The lower fixed body has a tapered shape having a smaller diameter from the upper portion to the lower portion, a ridge surface is formed on the outer periphery, a hexagonal groove is formed on the upper surface, and a screw groove is formed in the lower portion of the hexagonal groove.

The threaded surface formed along the longitudinal direction on the outer periphery of the lower fixture allows the lower fixture to be stably fixed to the patient's gums.

The hexagonal groove formed in the lower fixture is a groove formed in a hexagonal shape on the inner surface, and is engaged with a nut portion of an abutment to be described below, and the screw groove is a groove having a screw surface on the inner surface. And is fastened to the threaded portion of the fastening screw.

The abutment 20 coupled to the upper surface of the lower fixture 10 is composed of a hollow upper body attachment and a lower attachment having a smaller diameter downward at the lower end of the upper attachment A step 22 is formed at a portion where the upper attachment and the lower attachment are in contact with each other because the outer periphery of the lower abutment is larger and a nut portion having a hexagonal horizontal cross section is formed at the lower end of the lower attachment. .

That is, the step 22 is formed in the circumferential direction on the outer circumference of the abutment 20.

In addition, the abutment is provided with a space portion for opening the upper and lower portions and for inserting a fastening screw therein, and a projecting portion protruding into the lower portion of the inner side of the space portion is formed, Protrudes to the open bottom of the abutment, but is not released.

That is, when the operator inserts the abutment into the hexagonal groove of the lower fixture and presses it, the nut portion formed at the lower portion of the abutment is inserted into the hexagonal groove of the lower fixture so that the abutment is not rotated .

The fastening screw is inserted into the upper portion of the abutment inserted into the upper portion of the lower fixture. The fastening screw has a cylindrical head portion 31, And a screw portion 34 formed at a lower portion of the body portion 35 and having a thread at an outer circumferential portion of a certain length. Particularly, the threaded portion 34 is composed of an upper extension portion 34-1 and a lower helical portion 34-2. On the outer peripheral surface of the body portion and the extended portion of the threaded portion 34, Respectively.

At this time, the head part of the fastening screw is coupled to the upper part of the attachment so as to protrude from the upper part of the attachment, and the diameter of the screw part is formed to be smaller than the body part, so that a step is formed in the body part and the screw part.

4, the fastening screw is generally inserted into the upper portion of the abutment and is engaged with the lower fixture 10 through the abutment 20, thereby forming the lower fixture 10, And the abutment 20 are combined.

The head portion of the tightening screw is caught by the protrusion formed on the inner surface of the abutment so that the threaded portion of the tightening screw protrudes to the opened lower portion of the abutment but is not released to the outside.

In the present invention, the head portion is formed in a tapered shape having a larger diameter from the upper portion to the lower portion.

In addition, the release preventing grooves formed in the body portion and the screw portion of the fastening screw serve to evenly distribute external forces such as chewing force and repeated load received by the fastening screws, so that the abutment combined with the fastening screw Thereby more completely preventing the lower fixture from loosening or breaking.

In addition, since the body portion and the threaded portion have the release preventing grooves formed thereon, elastic deformation occurs around the release preventing grooves, and the degree of adhesion between the abutment and the fastening screw is improved.

The release preventing grooves are formed by cutting with a cutting machine. The number of the release preventing grooves is formed by machining three pieces on each of the body portion and the screw portion.

The operator inserts the fastening screw into the upper portion of the abutment inserted in the upper portion of the lower fixture so that the screw portion of the fastening screw faces downward and a screwdriver is inserted into the screw groove formed in the upper surface of the fastening screw Rotate the screwdriver so that the screw groove of the lower fixture and the screw of the fastening screw are fastened.

That is, the lower fixture and the abutment are engaged with each other with the fastening screw interposed therebetween, and the nut portion of the abutment is inserted and fixed in the hexagonal groove of the lower fixture, and the fastening screw is inserted into the upper portion of the lower fixture And the threaded portion of the fastening screw is fastened to the threaded groove of the lower fixture to be secondarily fixed.

The lower fixture, the abutment and the fastening screw of the present invention are made of a metal such as titanium, and the titanium has a small specific gravity, a low thermal conductivity and a low coefficient of thermal expansion, a high hardness and a high corrosion resistance, There are advantages.

Therefore, according to the present invention, since the abutment and the fixture coupled by the fastening screw are not easily released by the escape groove formed in the fastening screw, there is a remarkable effect that the implant can be stably used for a long period of time.

10: lower fixture 11: hexagonal groove
12: screw groove
20: abutment 21: protrusion
22: step 24: nut part
30: fastening screw 31: head part
32: driver groove 33, 36:
34: threaded portion 35:
34-1: extension site 34-2: spiral site

Claims

A lower fixture 10 placed on the gum and serving as an artificial root, an abutment 20 coupled to a lower surface of the lower fixture 10 and coupled to an artificial tooth at an upper portion thereof, And a fastening screw 30 which penetrates through the upper fixing body 20 and engages with the lower fixing body 10 to couple the lower fixing body 10 and the abutment 20,
The fastening screw 30 has a cylindrical head portion 31 having a driver groove 32 formed on an upper surface thereof, a body portion 35 formed at a lower portion of the head portion 31, And a threaded portion 34 formed on the outer periphery of a part of the threaded portion 34. The threaded portion 34 includes an upper extension portion 34-1 and a lower helical portion 34-2, (33, 36) are formed on the outer circumferential surface of the body part and the outer circumferential surface of the extended part of the screw part (34).

[2] The apparatus according to claim 1, wherein the release preventing grooves (33) are formed by cutting by a cutting machine, and are formed in a ring shape, and are formed in a plurality of spaced- Formed fastening screw.