WO2012161356A1

WO2012161356A1 - Implant fixture

Info

Publication number: WO2012161356A1
Application number: PCT/KR2011/003744
Authority: WO
Inventors: 김영재
Original assignee: Kim Youngjae
Priority date: 2011-05-23
Filing date: 2011-05-23
Publication date: 2012-11-29
Also published as: CN103547233A

Abstract

The present invention relates to an implant fixture, and more specifically, to an implant fixture, wherein the shape of a screw groove formed on the outer surface of the fixture is formed with a flat portion, a curved portion and a straight portion, respectively, to fix the fixture to the alveolar bone, thereby improving the binding force of the alveolar bone and the fixture. According to the present invention, the binding force of a fixture and the alveolar bone is enhanced so as to prevent the separation of an implant after operation, and the stress applied to the alveolar bone is dispersed so as to prevent the necrosis of the alveolar bone.

Description

Implant Fixtures

The present invention relates to an implant fixture, and more specifically, to form a screw bone formed on the outer surface of the fixture to fix the fixture to the alveolar bone by forming a flat portion, a curved portion, and a straight portion in order to form a coupling force between the alveolar bone and the fixture. The present invention relates to an implant fixture.

A dental implant is a new method of manufacturing artificial teeth by planting a fixture similar to the root in the jawbone where the root of the lost tooth (root) is located. This method is more stable than fixed teeth because there is no damage to adjacent teeth and no secondary caries.

In addition, when using a removable denture when a large number of teeth are missing, there is an uncomfortable feeling in the gums due to force on the periodontal tissue (gum). There is no pain and foreign body, which can improve the quality of life and satisfaction of patients.

Recently, implantation procedures for semi-permanently replenishing lost teeth have become common.

1 is an exploded perspective view showing a coupling state of a conventional implant structure, the fixture 110 is fixed to the insertion hole formed inside the alveolar bone, the abutment coupled to the upper portion of the fixture 110 serves as the skeleton of the artificial tooth It is made of a 120.

A thread is formed on the outer surface of the fixture 110 to be inserted while rotating into the alveolar bone, and the alveolar bone tissue is inserted into the screw bone formed between the thread and the thread to generate a firm coupling force.

However, the cross section of the screw bone of the conventional fixture 110 is circular or straight, there was a disadvantage that the perfect coupling with the alveolar bone.

An object of the present invention for solving the above problems is to provide a fixture for implants that can be optimized by the height and direction of the alveolar bone by configuring the shape of the screw bone of the fixture in three different steps.

The present invention devised to solve the above problems is a fixture for supporting the abutment is embedded in the alveolar bone is coupled to the upper, the outer surface of the cylindrical body is formed with an alternating thread and screw bone from the top to the bottom The screw bone is characterized by consisting of a flat portion of the upper portion, a curved portion in the middle, and a straight portion of the lower portion.

The flat portion is formed in a straight line in the direction of the center of the fixture body from the end of the screw thread in a state parallel to the ground, the curved portion is formed in the shape of a circular arc downward from the end of the flat portion, the straight portion is the curve It is characterized in that it is formed from the end of the portion to the end of the screw threaded in a straight line in a state inclined at an angle of 30 to 50 ° with respect to the ground in the outward direction of the fixture body.

The flat portion is inclined at an angle smaller than 10 ° with respect to the ground, and is formed in a straight line from the end of the screw thread toward the center of the fixture body, and the curved portion is formed in the shape of a circular arc downward from the end of the flat portion. The straight portion may be formed from the end of the curved portion to the end of the screw threaded downward in a straight line in a state inclined at an angle of 30 ° to 50 ° with respect to the ground in the outward direction of the fixture body.

A cylindrical post in which the abutment is inserted and fixed is formed in the axial direction inside the body, and a hexagonal coupling part having a through hole communicating with the post is formed on the upper surface of the body, and an inner wall surface is formed below the post. Hexagonal fixing holes are formed in which threads are formed.

The outer diameter of the cylindrical body is the first largest at the top, the outer diameter of the neck portion located below the top end is the second small, the outer diameter of the central portion located below the neck part is the second largest, from the center to the bottom As the outer diameter is gradually reduced to the smallest outer diameter of the lower end may have a shape that is the smallest.

In another aspect of the present invention, the height of the pitch of the thread is the first largest at the top end, the height of the pitch of the thread of the neck portion located below the top end is the second small, the thread of the central portion located below the neck portion The pitch of the second is the second, the height of the thread of the thread is gradually smaller as going down from the center portion may have a shape that the height of the lowest end is the smallest.

According to the present invention, the coupling force between the fixture and the alveolar bone is increased, so that the implant does not drop out after the procedure, and the stress applied to the alveolar bone is dispersed, thereby preventing the necrosis of the alveolar bone.

In addition, according to the present invention it is possible to implant implants in a variety of ways according to the user's alveolar bone state, the coupling force of the fixture and the abutment is increased, it is possible to adjust the direction of the artificial teeth according to the dental arrangement of the patient. .

In addition, according to the present invention by appropriately improving the binding force of the fixture, the implant procedure is easy, there is an effect that the fixture is firmly combined with the alveolar bone and jaw bone.

1 is an exploded perspective view showing a bonding state of a conventional implant structure.

2 is a cross-sectional view showing a screw pitch structure of a fixture according to an embodiment of the present invention.

3 is an enlarged cross-sectional view of the screw pitch structure of FIG.

4 is a cross-sectional view showing the inclination angle of the flat portion.

5 is a cross-sectional view showing the structure of a fixture.

Figure 6 is a cross-sectional view showing an internal coupling state of the fixture and the abutment.

Fig. 7 is a cross-sectional view showing the state of coupling between the fixture and the abutment of the external method.

8 is a cross-sectional view showing a cross-sectional structure of a fixture according to another embodiment of the present invention.

Hereinafter, an implant fixture (hereinafter referred to as a "fixture") according to an embodiment of the present invention will be described with reference to the drawings.

1 is a cross-sectional view showing a screw pitch structure of the fixture according to an embodiment of the present invention, Figure 2 is an enlarged cross-sectional view of the screw pitch structure of Figure 1, Figure 3 is a cross-sectional view showing the inclination angle of the flat portion.

The implant 100 is formed in such a way that a crown (not shown) is overlaid on a skeleton consisting of the fixture 110 and the abutment 120.

The fixture 110 is embedded in the alveolar bone and serves as the root of an artificial tooth, and a thread 112 is formed on a surface of a substantially cylindrical body 111, and between the thread 112 and the thread 112, a screw bone ( 114) is formed.

Screw valley 114 is formed starting from the lower end of the upper thread 112 to the upper end of the lower thread 112.

The uppermost part of the screw valley 114, that is, the position starting from the lower end of the upper thread 112, forms a straight flat portion A. The flat portion A extends toward the center of the body of the fixture 110 while having an inclination of approximately the angle of the thread 112.

The flat portion A is maintained in a state parallel to the ground or inclined by a predetermined angle with respect to the ground, assuming that the central axis of the fixture 110 is perpendicular to the ground.

The state where the flat portion A is parallel to the ground is not a spiral thread 112 but a case where a plurality of circular threads are formed along the circumference of the body, and the flat portion A is inclined in a general spiral shape. If a thread is formed.

When the flat portion A is inclined, a flat angle is formed between the virtual surface parallel to the ground and the flat portion A, as shown in FIG. 4, and a flat angle within 10 degrees with respect to the ground ( will have a)

Inside the flat portion A, the curved portion B is located. The curved portion B is formed in an arc shape from the end of the flat portion A to the bottom of the fixture 110.

The straight portion C is connected to the end of the curved portion B having an arc shape. The straight portion C is formed in a straight line in an obliquely tilted outward direction of the cross section of the fixture 110 from the end of the curved portion B. The straight portion C is preferably inclined with a slope of 30 ° to 50 ° with respect to the ground. The straight portion C extends to the upper end of the thread 112 located below.

The screw valley 114 having the pattern of the flat portion A, the curved portion B, and the straight portion C is repeatedly formed on the outer surface of the body of the fixture 110.

When the straight portion C is formed at the lower end of the screw bone 114, the thread 112 easily enters the alveolar bone, thereby facilitating the implant procedure. And since the curved portion (B) is a part of the arc, there is an effect that the stress is evenly distributed in the alveolar bone tissue that came into the screw bone 114 after the procedure. When the stress is dispersed, necrosis of the alveolar bone is reduced so that the tooth does not fall off after the procedure.

The uppermost flat portion (A) pushes the alveolar bone tissue from above to allow the artificial tooth to stand stably.

On the other hand, Figure 4 is an exploded perspective view showing the structure of the implant according to an embodiment of the present invention, Figure 5 is a cross-sectional view showing the structure of the fixture.

Fixture 110 is a pillar of the teeth by being seated in a forearm drilled in the alveolar bone in advance. When the fixture 110 is embedded in the alveolar bone, the thread 112 rotates and is firmly embedded in the alveolar bone.

Hexagonal coupling portions 116 are protruded from the top surface of the fixture 110. Coupling portion 116 is fitted into a hexagonal groove (not shown) formed on the lower surface of the abutment 120 of the external method is fixed.

Due to the coupling part 116 formed in the fixture 110 of the present invention, an implant method of an external method is possible.

Meanwhile, in order to use the fixture 110 in an internal manner, a cylindrical post 118 is formed in the center of the coupling part 116 and the body 111 in parallel in the axial direction.

The post 118 is a cylindrical empty space, and is a portion into which the pillar 122 of the abutment 120 is inserted and fixed. The post 118 may be a straight cylindrical shape, but may also be a taper shape that narrows downward in diameter.

Since the pillar 122 of the abutment 120 is inserted into and fixed inside the fixture 110, the fixture 110 of the present invention has a post 118 formed in addition to the coupling part 116. This can be applied to both internal and external methods.

A crown fixing groove 124 is formed on the upper surface of the abutment 120 to seat the body of the artificial tooth.

On the other hand, the fixture 110 of the present invention is formed with a cylindrical post 118 in the center, from the top of the post 118 to the length of approximately 2/3 to the length of the circular cross-section 118a.

The circular cross section 118a is a portion into which a conventional cylindrical or tapered abutment pillar 122 is inserted and fixed. No thread or fixing projection is formed on the inner wall of the circular cross-section 118a.

And the fixing hole consisting of the hexagonal cross-section 118b is formed from about 2/3 from the top to the lower end from the inside of the post 118. Threads are formed on the inner surface of the hexagonal cross-section 118b.

6 is a cross-sectional view showing a coupling state between fixtures and abutments, and shows a coupling relationship between two components.

The pillar 122 of the abutment 120 is cylindrical or tapered, and a thread 126 is formed at the lower end of the pillar 122. The thread 126 of the abutment 120 is engaged with the fixing hole thread 118c formed at the bottom of the post 118 of the fixture 110. The abutment 120 and the fixture 110 are firmly coupled to each other by the fixing hole threads 118c.

In addition, Figure 7 is a cross-sectional view showing the coupling state of the fixture and the abutment, the lower end portion of the abutment 130 is coupled to the external method while surrounding the coupling portion 116 of the upper surface of the fixture 110 It shows the state.

Thus, using the fixture 110 of the present invention, it is possible to freely select an implant procedure of an internal or external method, and to apply various types of abutment coupling methods.

On the other hand, the body 111 of the fixture 110 of the present invention has a different outer diameter for each portion.

That is, the outermost end 110 of the body 111 has the largest outer diameter, and the outer diameter of the neck portion below it gradually decreases as it goes down and then grows again. The outer diameter of the thinnest part of the neck as a whole is the second smallest of the whole body (111).

The outer diameter at the center is the second largest after the top.

The outer diameter gradually decreases as it goes down from the center, and has the smallest outer diameter at the bottom.

As a result, since the fixture 110 of the present invention takes the shape of a wide jar, the outermost contour of the fixture 110 becomes an S shape. This form is similar to the root of a natural tooth, it is possible to perform a fixture (110) implantation suitable for the anatomy of the patient.

Since the height of the thread 112 formed on the body 111 (height from the surface of the body) is almost uniform, the shape of the outer boundary line of the thread formed on the fixture 110 as a whole is as wide as the shape of the body 111. It takes the form of a jar.

When the fixture 110 of this type is buried in the alveolar bone, the lower end of the lower portion of the center portion is thin so that it is easily inserted into the alveolar bone. And the outer diameter of the central portion is the second time the fixture 110, the screw thread is automatically given to the bone tissue at the time of implantation, when the procedure is finished by the top end of the outer diameter, the initial coupling force is increased.

And when the fixture 110 is connected to the abutment having a small outer diameter, the space due to the difference in the outer diameter is regenerated more and more gum tissue over time after the procedure is completed to reconnect the coupling portion 116 of the body 111. Cover it. The fixture 110 is then completely embedded in the gums and has the effect of protecting the periodontal tissue from mechanical microbiological stimuli from the outside when functioning in the oral cavity. In addition, since the outer diameter of the fixture 110 embedded in the alveolar bone increases and decreases downward, it is advantageous to disperse the occlusal force applied to the fixture 110.

8 is a cross-sectional view illustrating a cross-sectional structure of a fixture according to another embodiment of the present invention.

In the above-described embodiment, the outer diameter of the fixture 110 body 111 is changed in the upper and lower portions, but the height of the thread 112 is configured to be constant. In the second embodiment 200, the shape of the body 202 is a taper shape having a constant outer diameter or inclined at a predetermined angle, and the fixture having the same effect by configuring the pitch height of the thread 204 different from each other ( 200) can be produced.

As shown in FIG. 8, the pitch of the thread 204 of the neck portion of the fixture 200 is lowered, the pitch of the center portion is made higher again, and the pitch is gradually lowered from the center portion to be lowered. The fixture 200 in the same jar shape can be produced.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the above-described technical configuration of the present invention may be embodied by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features of the present invention. It will be appreciated that the present invention may be practiced as. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

The present invention is applied to the fixture for the implant, it is possible to improve the bonding force between the alveolar bone and the fixture.

Claims

A fixture supporting an abutment embedded in an alveolar bone and coupled to an upper portion,

On the outer surface of the cylindrical body, threads and screw bones are alternately formed from top to bottom,

The screw bone is an implant fixture, characterized in that consisting of a flat portion of the upper portion, a curved portion in the middle, and a straight portion of the lower portion.
The method of claim 1,

The flat portion is formed in a straight line in the direction of the center of the fixture body from the end of the thread in a state parallel to the ground,

The curved portion is formed in the shape of a circular arc downward from the end of the flat portion,

The straight part is an implant fixture, characterized in that formed from the end of the curved portion to the end of the screw threaded in a straight line in a state tilted at an angle of 30 ° to 50 ° with respect to the ground in the outward direction of the fixture body.
The method of claim 1,

The flat portion is formed in a straight line in the direction of the center of the fixture body from the end of the thread in a state inclined at an angle less than 10 ° with respect to the ground,

The curved portion is formed in the shape of a circular arc downward from the end of the flat portion,

The straight portion is an implant fixture, characterized in that formed from the end of the curved portion to the end of the screw threaded in a straight line in a state inclined at an angle of 30 ° to 50 ° with respect to the ground in the outward direction of the fixture body.
The method of claim 1,

A cylindrical post in which the abutment is inserted and fixed is formed in the axial direction inside the body, and a hexagonal coupling part having a through hole communicating with the post is formed on the upper surface of the body, and an inner wall surface is formed below the post. An implant fixture, characterized in that a hexagonal fixing hole is further formed on the thread.
The method of claim 1,

The outer diameter of the cylindrical body is the first largest end,

The outer diameter of the neck portion located below the top end is the second smallest,

The outer diameter of the central part located below the neck is the second largest,

Implant fixture, characterized in that the outer diameter is gradually reduced while going down from the center portion is the smallest outer diameter.
The method of claim 1,

The height of the pitch of the thread is the first largest end,

The height of the pitch of the thread of the neck portion located below the top end is second small,

The height of the pitch of the threads of the central part located below the neck part is the second largest,

An implant fixture, characterized in that the height of the lowermost end becomes smaller as the pitch of the thread gradually decreases as it goes down from the center part.