WO2015060516A1

WO2015060516A1 - Implant fixture removing device

Info

Publication number: WO2015060516A1
Application number: PCT/KR2014/006420
Authority: WO
Inventors: 김병국; 정시영
Original assignee: 오스템임플란트 주식회사
Priority date: 2013-10-21
Filing date: 2014-07-16
Publication date: 2015-04-30
Also published as: KR101535255B1; TWI531357B; KR20150045822A; TW201521692A

Abstract

Disclosed is an implant fixture removing device for removing an implant fixture, which is implanted into a human alveolar bone and forms an artificial dental root. The disclosed fixture removing device comprises: a fastening screw fastened to a female screw portion of a fixture; and a removing driver forced against the top surface of the fixture, while being fastened to the fastening screw, such that the fixture is rotated and removed. A fastening male screw portion is formed on one end of the fastening screw and is screw-fastened to the female screw portion of the fixture, and a removing female screw portion is formed inside the other end of the fastening screw to have a thread formed in the opposite direction to the direction of a thread of the fastening male screw portion. An insertion hole is formed inside one end of the removing driver such that the other end of the fastening screw is inserted therein, and a removing male screw portion is formed at the center portion of the insertion hole to be screw-fastened to the removing female screw portion of the fastening screw, and a friction portion is formed on the bottom of one end of the removing driver to make a frictional contact with the top surface of the fixture.

Description

Implant Fixture Removal Device

The present invention relates to an implant fixture removal device, and more particularly to an implant fixture removal device used when removing the implant fixture which is placed in the alveolar bone of the human body to form the artificial root.

In general, dental implants are implanted with artificial tooth roots made of titanium, etc., which are not rejected to the human body to replace the roots of the missing teeth, and are implanted in the alveolar bone where the teeth fall. It is a procedure to recover.

Such a dental implant assembly includes a fixture that is implanted in an alveolar bone of a human body to form an artificial tooth root, an abutment screwed to the fixture, and fixed to the fixture by an abutment. Prostheses, such as artificial teeth.

In order to implant the fixture into the alveolar bone, after forming a hole having a predetermined diameter in the alveolar bone, and inserting the fixing body formed with a male thread on the outer peripheral surface while rotating in the hole, the fixture is screwed into the alveolar bone Is placed.

However, there may occur a case in which the fixation already implanted in the alveolar bone of the human body needs to be removed for various reasons, such as a failure of bone fusion, a failure of bone regeneration, or a loss of bone due to inflammation around the implant.

In this case, as shown in FIG. 1, after removing the alveolar bone 20 around the implant fixture 10 using a triple drill 30, the fixture 10 is removed. The procedure has been generally used. The reason for doing this is because the fixture 10 is already in contact with the alveolar bone 20, so it is not easy to pull out only the fixture 10 itself using a general screw removal tool.

However, this procedure causes extensive damage to the bone tissue around the fixture, and thus has a problem of causing a lack of remaining bone when a new fixture is to be placed after removing the fixture. In addition, the thickness of the remaining bone around the fixture should be secured at least 2mm, and if the bone tissue around the fixture is damaged to remove the fixture, additional bone grafts are required, which requires additional cost and time for the implant procedure. .

The present invention has been made to solve the conventional problems as described above, implant implant fixture removal device that can be easily removed with minimal implantation of bone tissue implanted in the alveolar bone of the human bone fusion The purpose is to provide.

In the implant fixture removal device according to the present invention for achieving the above technical problem, in the implant fixture removal device for removing the implant fixture which is implanted in the alveolar bone of the human body to form an artificial tooth root,

A fastening screw fastened to the female screw portion of the fixture; And a removal driver that is in close contact with the top surface of the fixture in a state of being fastened to the fastening screw to rotate and remove the fixture.

One end of the fastening screw is provided with a fastening male screw threaded to the female screw of the fixing body, and the other end of the fastening screw has a removing female screw part having a screw line in a direction opposite to the direction of the screw thread of the fastening male screw part. Formed,

An insertion hole into which the other end of the fastening screw is inserted is formed in one end of the removal driver, and a removal male screw part which is screwed into the removal female screw part of the fastening screw is formed in the center of the insertion hole. A lower portion of the lower portion is characterized in that the friction portion is in friction contact with the upper surface of the fixture.

The fastening male thread portion of the fastening screw may be formed of a right hand thread, and the fastening female thread portion of the fastening screw and the fastening male thread portion of the removing driver may be formed of a left screw.

In addition, a polygonal tool coupling portion may be formed on the outer circumferential surface of the other end of the fastening screw and the outer circumferential surface of the other end of the removal driver to which the tool for rotating the fastening screw and the removal driver is coupled.

In addition, the friction portion may include a plurality of tooth screws formed along the circumference of the insertion hole of the removal driver.

In addition, each of the plurality of toothed screws may be formed vertically in the front of the counterclockwise direction, the rear side may be formed to be inclined.

The removal driver may include a first member and a second member that can be separated and coupled to each other, and the first member includes the insertion hole, the friction part, and a first coupling hole formed above the insertion hole. The second member may have a diameter larger than a diameter of the removal male screw portion and a first coupling portion inserted into the first coupling hole of the first member on an upper side of the removal male screw portion. .

In addition, the first coupling hole of the first member and the first coupling portion of the second member may be formed in a polygon of a shape corresponding to each other.

In addition, a second coupling hole is formed in the first member with a diameter smaller than the diameter of the first coupling hole and the insertion hole between the first coupling hole and the insertion hole, and the first coupling portion may be formed in the second member. A second coupling part inserted into the second coupling hole of the first member is formed between the removal male thread parts, and the second coupling hole of the first member and the second coupling part of the second member are circular with a diameter corresponding to each other. Can be formed.

According to the implant fixture removing apparatus according to the present invention, since a strong torque in the counterclockwise direction can be applied to the fixture placed in the alveolar bone more effectively, only the fixture from the alveolar bone can be easily removed. Therefore, since the damage of the bone tissue around the fixture can be minimized upon removal of the fixture, new implant fixtures of the same diameter can be reinserted after removal of the fixture, and additional damage due to damage to the bone tissue around the fixture can be achieved. There is no need for bone grafts, which can reduce the cost and time for implant re-surgery.

1 is a view showing an example of a device for removing a conventional implant fixture.

Figure 2 is a view showing a separate implant fixture removal apparatus according to an embodiment of the present invention.

3 is an assembly view showing a state in which the implant fixture removal device shown in Figure 2 is coupled to the implant fixture.

4 is a perspective view of the fastening screw shown in FIG.

5 is a perspective view of the removal driver shown in FIG. 2.

FIG. 6 is a view illustrating the removal driver illustrated in FIG. 2 separated into two members.

Hereinafter, an implant fixture removing apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the following drawings indicate like elements.

Figure 2 is a view showing a separate implant fixture removal device according to an embodiment of the present invention, Figure 3 is an assembly view showing a state in which the implant fixture removal device shown in Figure 2 coupled to the implant fixture. 4 is a perspective view of the fastening screw shown in Figure 2, Figure 5 is a perspective view of the removal driver shown in FIG.

2 to 5 together, the implant fixture removal apparatus 100 according to an embodiment of the present invention, the implant fixture 10, bone failure due to failure of bone fusion or bone regeneration surgery, inflammation around the implant It is a device used when removing for various reasons such as loss of.

The implant fixture 10 is implanted in the alveolar bone of the human body to form an artificial tooth by fusion, and the outer peripheral surface is formed with a male screw portion 12 is screwed to the alveolar bone. In addition, a coupling hole 14 is formed in the fixing body 10 at a predetermined depth from an upper end, and an inner peripheral surface of the coupling hole 14 is used to fix a prosthesis such as an artificial tooth to the fixing body 10. A female threaded portion 16 is formed so that the butt can be screwed. In general, the male threaded portion 12 of the fixture 10 is formed of a right hand thread, and the female threaded part 16 is formed of a right handed thread similarly to the male threaded part 12.

The implant fixture removing device 100 includes a fastening screw 110 fastened to the female screw portion 16 of the fastener 10 and the fastener 10 in a state of being fastened to the fastening screw 110. Is in close contact with the upper surface of the fixing member 10 is configured to include a removal driver 120 to remove.

A fastening male thread portion 112 fastened to the female screw portion 16 of the fixing body 10 is formed at an outer circumferential surface of one end of the fastening screw 110, and an internal thread portion removed to a predetermined depth from an upper end thereof in the other end portion thereof. 114 is formed. The fastening male thread portion 112 is formed with a right screw like the female threaded portion 16 of the fixing body 10, but the removal female threaded portion 114 is a left thread that is opposite to the direction of the screw thread of the fastening male thread portion 112. Is formed.

In addition, a polygonal first tool coupling part 118 is formed on the outer circumferential surface of the other end of the fastening screw 110 to which a tool such as a wrench for rotating the fastening screw 110 is coupled. 118 is used to fasten the fastening male threading portion 112 of the fastening screw 110 to the female screw portion 16 of the fixing body 10.

One end of the removal driver 120 is formed in a cylindrical shape having an insertion hole 122 into which the other end of the fastening screw 110 is inserted. In addition, a removal male thread part 124 extending in the longitudinal direction of the insertion hole 122 and fastened to the removal female thread part 114 of the fastening screw 110 at the center of the insertion hole 122 of the removal driver 120. ) Is placed. The removal male thread portion 124 is formed of a left screw like the removal female thread portion 114.

The reason why the removal female thread portion 114 of the fastening screw 110 and the removal male thread portion 124 of the removal screwdriver 120 is formed as a left screw is to remove the fixing body 10 from the alveolar bone. Turning 120 counterclockwise, i.e., to the left, removes the male screw portion 124 to the female threaded portion 114, while the removal screwdriver 120 lowers toward the upper side of the fixing body 10. To be in close contact with. This will be described later.

In addition, a second tool engaging portion 128 having a polygon is formed on an outer circumferential surface of the other end of the removing driver 120 to which a tool such as a wrench for rotating the removing driver 120 is coupled, and the second tool coupling portion Reference numeral 128 is used to fasten the removal male thread portion 124 of the removal driver 120 to the removal female thread portion 114 of the fastening screw 110 and to remove the fixture 10.

In addition, the lower end of one end of the removal driver 120 is in close contact with the upper end surface of the fixing body 10, at which time to increase the friction between the lower end of the one end of the removal driver 120 and the upper end surface of the fixing body 10. The friction portion 126 is formed at the lower end of one end of the removal driver 120. As shown in FIG. 5, the friction part 126 may include a plurality of tooth screws 127 formed along a circumference of the insertion hole 122 of the removal driver 120, but is not limited thereto. For example, the surface of the friction part 126 may be roughened to increase the friction force, or the friction part 126 may be coated with powder of a material having a high hardness to increase the friction force.

In addition, as shown in FIG. 5, each of the plurality of toothed screws 127 is preferably formed by vertically forming a front surface 127a in a counterclockwise direction and inclining a rear surface 127b. Since the plurality of tooth screws 127 formed in the shape as described above is to dig the top surface of the fixture 10 when rotated counterclockwise, the counterclockwise torque applied to the removal driver 120 is It can be surely delivered to the fixture (10).

Referring to FIG. 6, the removal driver 120 may be formed of two

members

120a and 120b that may be separated and coupled to each other. As such, the reason why the removal driver 120 is composed of two

members

120a and 120b is that the removal driver 120 having the structure in which the removal male screw part 124 is disposed inside the insertion hole 122 is provided. It is for making it easy to manufacture.

The first member 120a of the two

members

120a and 120b has an insertion hole 122 into which the other end of the fastening screw 110 is inserted, and at the lower end thereof, the friction part 126. A plurality of toothed screws 127 are formed. In addition, the second male member 120b of the two

members

120a and 120b includes a removal male thread portion 124 inserted into the insertion hole 122 and a second upper portion of the removal male thread portion 124. Tool coupling portion 128 is formed.

In addition, a first coupling portion 133 is formed in the second member 120b with a diameter larger than that of the removal male thread portion 124 between the removal male thread portion 124 and the second tool coupling portion 128. The first member 120a is formed with a first coupling hole 131 into which the first coupling portion 133 of the second member 120b is inserted and coupled to the upper side of the insertion hole 122. . The first coupling hole 131 and the first coupling portion 133 are formed in a polygon of a shape corresponding to each other so that the first coupling portion 133 does not go out in a state where the first coupling portion 133 is inserted into the first coupling hole 131. .

In addition, in the first member 120a, a second coupling hole has a diameter smaller than the diameter of the first coupling hole 131 and the insertion hole 122 between the first coupling hole 131 and the insertion hole 122. 132 is formed, and the second coupling portion 134 is inserted into the second coupling hole 132 between the first coupling portion 133 and the removal male screw portion 124 in the second member 120b. ) Is formed. The second coupling hole 132 and the second coupling portion 134 is formed in a circular shape having a diameter corresponding to each other.

The insertion hole is formed by passing through the first coupling hole 131 and the second coupling hole 132 formed in the first member 120a by removing the male screw part 124 of the second member 120b having the configuration as described above. When inserted so as to be positioned inside the first coupling portion 133 and the second coupling portion 134 of the second member (120b), the first coupling hole 131 and the second of the first member (120a) As each of the coupling holes 132 are inserted, the first member 120a and the second member 120b are coupled to the removal driver 120.

Hereinafter, with reference to Figure 3 will be described the principle that the fixture 10 placed in the alveolar bone of the human body by the implant fixture removal device 100 according to the present invention having the above configuration will be described.

As shown in FIG. 3, first, the fastening screw 110 is coupled to the fixture 10. Specifically, when a tool such as a wrench is coupled to the first tool coupling portion 118 of the fastening screw 110 and rotates in a clockwise direction, the fastening male screw portion 112 of the fastening screw 110 is fixed to the fixture 10. The fastening screw 110 is coupled to the fixture 10 while being fastened to the female screw portion 16 of the.

Next, the removal driver 120 is coupled to the fastening screw 110. Specifically, after the other end of the fastening screw 110 is inserted into the insertion hole 122 of the removal driver 120, a tool such as a wrench on the second tool coupling portion 128 of the removal driver 120 When the removal driver 120 is rotated in the counterclockwise direction, the removal male screw portion 124 of the removing driver 120 is fastened to the removal female screw portion 114 of the fastening screw 110, that is, the fixing body. Go down to (10).

When the removal driver 120 is lowered toward the fixture 10, the lower end of the removal driver 120 contacts the top surface of the fixture 10. At this time, the fastening force is applied to the fastening screw 110, and a strong compressive force is applied between the removal driver 120 and the fixture 10, so that the friction portion 126 formed on the lower end of the removal driver 120, ie, Tooth screw 127 is in close contact with the upper surface of the fixed body 10 with a strong friction force. Accordingly, the counterclockwise torque applied to the removal driver 120 is reliably transmitted to the fixture 10, so that the fixture 10 may be removed from the alveolar bone while rotating in the counterclockwise direction.

As described above, according to the implant fixture removing device 100 according to the present invention, since the strong torque in the counterclockwise direction can be applied to the fixture 10 placed in the alveolar bone more effectively, the fixture 10 from the alveolar bone ) Can be easily removed. Therefore, since the damage of the bone tissue around the fixture 10 can be minimized when the fixture 10 is removed, a new implant fixture of the same diameter can be placed again after removal of the fixture 10, and No need for additional bone graft due to damage to the bone tissue around the stagnation 10, thereby reducing the cost and time required for implant re-treatment.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Accordingly, the true scope of protection of the present invention should be defined by the appended claims.

The present invention can be used in the implant fixture removal device that can be easily removed while implanting the implant fixture fixed in the alveolar bone of the human body with minimal deletion of the surrounding bone tissue.

Claims

In the implant fixture removal device for removing the implant fixture which is implanted in the alveolar bone of the human body to form an artificial tooth root,

A fastening screw fastened to the female screw portion of the fixture; And

And a removal driver that is in close contact with the top surface of the fixture in a state of being fastened to the fastening screw to rotate and remove the fixture.

One end of the fastening screw is provided with a fastening male screw threaded to the female screw of the fixing body, and the other end of the fastening screw has a removing female screw part having a screw line in a direction opposite to the direction of the screw thread of the fastening male screw part. Formed,

An insertion hole into which the other end of the fastening screw is inserted is formed in one end of the removal driver, and a removal male screw part which is screwed into the removal female screw part of the fastening screw is formed in the center of the insertion hole. Implant fixture removal device, characterized in that the friction portion is in friction contact with the upper end surface of the fixture.
The method of claim 1,

The fastening male screw portion of the fastening screw is formed of a right screw, and the removal female screw portion of the fastening screw and the removal male screw portion of the removal driver are formed of a left screw.
The method of claim 1,

And a polygonal tool coupling portion, each of which is coupled to a tool for rotating the fastening screw and the removal driver, on the outer circumferential surface of the other end of the fastening screw and the other end of the removal driver.
The method of claim 1,

And the friction part includes a plurality of toothed screws formed along a circumference of the insertion hole of the removal driver.
The method of claim 4, wherein

Each of the plurality of toothed screw is an implant fixture removal device, characterized in that the front of the counterclockwise direction is formed vertically, the rear surface is inclined.
The method of claim 1,

The removal driver is composed of a first member and a second member that can be separated and combined with each other,

The first member, the insertion hole, the friction portion, and the first coupling hole is formed above the insertion hole,

The second member, wherein the removal male thread portion, and the first coupling portion inserted into the first coupling hole of the first member on the upper side of the removal male thread portion is formed with a diameter larger than the diameter of the removal male thread portion. Implant fixture removal device.
The method of claim 6,

Implant fixture removal apparatus, characterized in that the first coupling hole of the first member and the first coupling portion of the second member is formed in a polygon of a shape corresponding to each other.
The method according to claim 6 or 7,

In the first member, a second coupling hole is formed between the first coupling hole and the insertion hole with a diameter smaller than the diameter of the first coupling hole and the insertion hole,

The second member, the second coupling portion is formed between the first coupling portion and the removal male screw portion is inserted into the second coupling hole of the first member,

And a second coupling hole of the first member and the second coupling portion of the second member are formed in a circular shape having a diameter corresponding to each other.