KR101935504B1

KR101935504B1 - Screw for implant

Info

Publication number: KR101935504B1
Application number: KR1020170020937A
Authority: KR
Inventors: 박고춘
Original assignee: 박고춘
Priority date: 2017-02-16
Filing date: 2017-02-16
Publication date: 2019-01-04
Also published as: WO2018151380A1; KR20180094599A

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an implant screw used for medical use. More particularly, the present invention relates to an implant screw having a predetermined length and having a threaded portion on an outer circumferential surface thereof so that a part of a head is broken when a constant torque value by a fastening mechanism is reached, A formed body; And a head formed on an upper end of the body and having a fastening groove for fastening the fastening mechanism for fastening the body to the object, the fastening groove being formed in the longitudinal direction of the body, wherein the head has a circumferential direction And a fracture groove partially formed inwardly is formed in the inner circumferential surface of the implant screw, and when the constant torque value is reached by the fastening mechanism, a part of the fracture groove is broken.

Description

Screw for implant with constant torque value.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an implant screw used for medical use, and particularly to an implant screw in which a part of a head is broken when a constant torque value is reached.

In general, an implant is a dental procedure that restores the original function of the tooth by providing an artificial tooth by implanting osseointegration on the alveolar bone when the natural tooth is lost due to carelessness or poor management.

Implants used in the artificial tooth procedure consist of a fixture corresponding to the artificial root, an abutment corresponding to the 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 implanted in the gum to connect the fixture implanted in the alveolar bone to the artificial tooth.

The fixture and the abutment are fastened and fixed by a screw. The screw is composed of a head and a body, and a hexagonal tool hole is formed in an upper surface of the head, into which a tool is inserted. Further, the body extends from the lower end of the head and has threads formed on its outer surface.

The screw is inserted into the insertion hole formed in the abutment so that the head portion of the screw is engaged with the engagement hole in the lower portion of the insertion hole. Then, the screw is inserted into the hexagonal hole of the wrench in the upper surface of the head portion, Tighten to the screw groove.

When the tool is continuously used in this process, the accuracy of the torque value is lowered due to the insufficient elasticity of the spring. In addition, There is a problem that breakdown occurs frequently due to blood, chemicals, etc. When rotating the screw with an excessive torque value, there is a problem that the wrench formed in the screw is broken or the head of the screw is broken.

Korean Utility Model Registration No. 20-0449358, "Abutment Screw"

The object of the present invention is to provide an implant screw having a constant torque value capable of performing an implant procedure conveniently and promptly when a part of a head is broken when a constant torque value is reached by a fastening mechanism .

According to an aspect of the present invention, there is provided an implant screw having a constant torque value, comprising: a body having a predetermined length and formed with threads on an outer circumferential surface thereof; And a head formed on an upper end of the body and having a fastening groove for fastening the fastening mechanism for fastening the body to the object, the fastening groove being formed in the longitudinal direction of the body, wherein the head has a circumferential direction And a breaking groove is formed so as to be embedded in the inside so that a part of the breaking groove is broken when a constant torque value is reached by the fastening mechanism.

According to the present invention, a fracture groove is formed in the head of the implant screw, and a part thereof is broken when the constant torque value is reached by the fastening mechanism. Therefore, a separate torque latch for measuring the torque value is not necessary, It is possible to prevent the loosened fastening groove from being broken due to excessive torque. In addition, since the screw itself is provided with the torque value, both the fixture and the abutment can be engaged with a constant torque value when using a fastening mechanism such as a torque latch and not using a fastening mechanism such as a torque latch.

FIG. 1 is a view showing a use state of an implant screw according to the present invention,
FIG. 2 is a perspective view of an embodiment of an implant screw according to the present invention,
FIG. 3 is an exemplary view showing a state in which a part of a head of an implant screw according to the present invention is broken;
FIG. 4 is a front view and a cross-sectional view of an implant screw according to an embodiment of the present invention,
FIG. 5 is a front view and a cross-sectional view of an implant screw according to another embodiment of the present invention,
6 is a front view and a sectional view showing an embodiment in which a through hole is formed in an implant screw according to the present invention,
FIG. 7 is a sectional view taken along line AA in FIG. 6,
FIG. 8 is a front view and a cross-sectional view showing another embodiment in which a through hole is formed in an implant screw according to the present invention,
9 is a sectional view taken along line BB in Fig. 7,
10 is a front view and a cross-sectional view showing another embodiment in which a through hole is formed in an implant screw according to the present invention,
11 is a sectional view showing an embodiment in which a fracture inducing protrusion is formed on an implant screw according to the present invention.

In the present invention, a body having a predetermined length and formed with threads on the outer circumferential surface is provided so that a part of the head is broken when the constant torque value is reached by the fastening mechanism to perform the implant procedure conveniently and quickly. And a head formed on an upper end of the body and having a fastening groove for fastening the fastening mechanism for fastening the body to the object, the fastening groove being formed in the longitudinal direction of the body, wherein the head has a circumferential direction And a part of the fracture groove is fractured when a constant torque value by the fastening mechanism is reached. The present invention proposes an implant screw having a constant torque value.

The scope of the present invention is not limited to the embodiments described below, and various modifications may be made by those skilled in the art without departing from the technical scope of the present invention.

Hereinafter, an implant screw having a constant torque value according to the present invention will be described in detail with reference to FIGS. 1 to 11. FIG.

The implant screw A having a constant torque value according to the present invention is inserted into the abutment C to join the fixture B and the abutment C as shown in Fig. 1, and the threaded portion is inserted into the abutment C And the threaded portion is engaged with the screw groove formed in the fixture B to engage.

The implant screw A includes a body 200 having a predetermined length as shown in FIG. 2, and a head 100 formed at an upper end of the body 200. The body 200 has threads formed at a predetermined height from the lower end thereof for screw connection with the fixture B.

It is preferable that the head 100 has a larger diameter than the diameter of the body 200 for seating inside the abutment C so that only the threaded portion inserted into the abutment C is inserted therethrough, But is not limited thereto.

The head 100 is provided with a coupling groove 110 in which the fastening mechanism for rotating the body 200 to connect the body 200 to the object, that is, the fixture B, And a breaking groove 120 is formed on the outer side of the coupling groove 110 so as to be embedded inward along the circumferential direction.

2, the cross-sectional surface may be hexagonal, rectangular, octagonal, star-shaped, or other polygonal shape. The size of the coupling groove 110 may be, for example, And may be formed to be equal to or different from the upward and downward directions with respect to the fracture groove 120.

The implantation screw A according to the present invention has a smaller thickness than the portion where the fastening groove 110 and the fracture groove 120 are not formed between the fastening groove 110 and the fracture groove 120 due to the fracture groove 120 And a break occurs at a constant torque value.

3, when a constant torque value is reached by the fastening mechanism, a break occurs at a position where the fracture groove 120 is formed, so that a part of the head 100 is broken, so that the fixture B and the abutment C ) To a predetermined torque value, there is no need for a separate torque latch for measuring the torque value.

In addition, it is possible to prevent the coupling groove 110 from being broken due to excessive torque by the coupling mechanism, and a torque value is given to the implant screw A itself. In the case of using the coupling mechanism, It is possible to combine the fixture B and the abutment C with a constant torque value when it is difficult to use a fastening mechanism such as a torque latch.

When the implant screw A is fastened with excessive torque, the screw itself is broken. On the other hand, when the implant screw A is fastened with a short torque, the screw is loosened. In the present invention, ) Is broken through a constant torque value.

Generally, when the implant screw A is fastened, the optimal torque value is 35 Ncm. However, the optimum torque value is set to be a predetermined value to be given to break the part of the head 100 of the implant screw A of the present invention depending on the condition of the patient, The torque value is changed.

Therefore, in the following, various embodiments for providing various but constant torque values of the implant screw (A) according to the present invention will be described.

[Example 1]

The fracture groove 120 formed in the head 100 of the implant screw A according to the present invention may have a different torque value depending on the depth of insertion. For example, as shown in FIG. 4, when the depth of the fracture groove 120 is equal to the depth d1, as shown in FIG. 5, the depth of the fracture groove 120 is greater than the depth d2 A part of the head 100 is broken by the small torque value.

As shown in FIG. 5, when the breaking groove 120 is recessed by the length d2, if the constant torque value for breaking a part of the head 100 is 35 Ncm, as shown in FIG. 4, 120 are engaged, a constant torque value for a part of the head 100 to be broken has a torque value of any one of values less than 35 Ncm.

[Example 2]

The through hole 130 may be formed in the coupling groove 110 located on the same line as the fracture groove 120 formed in the head 100 of the implant screw A of the present invention, as shown in FIGS. 6 to 10 . The through-holes 130 may be formed in various shapes and sizes, which may vary depending on the magnitude of the constant torque value provided to be broken.

6 and 7, when the fastening grooves 110 are in the form of a hexagonal column, all of the fastening grooves 110 located on the same line as the broken grooves 120 are provided with one through- 8 and 9, it is also possible to form a through hole 130 on one of the six surfaces of the coupling groove 110 located on the same line as the broken groove 120, A hole 130 may be formed. In this case, the head 100 of the implant screw A shown in Figs. 6 and 7 is broken when reaching a smaller torque value than the head 100 of the implant screw A shown in Figs. 8 and 9 .

10, when the fastening grooves 110 are in the hexagonal column shape, a plurality of through holes 130 are formed on the surfaces of the fastening grooves 110 located on the same line as the breaking grooves 120 And thus a part of the head 100 of the implant screw A is fractured by a torque value different from a constant torque value at which the head 100 of the implant screw A shown in Figs. .

Therefore, the torque of the implant screw (A) according to the present invention can be changed according to the degree of insertion of the fracture groove (120), as well as the coupling groove (110 Size, and position of the through-holes 130 formed in the head 100 of the implant screw A according to the present invention, depending on the condition of the patient, the intended use of the implant, and the like. ) May be given different values of a constant torque to be broken.

[Example 3]

In the coupling groove 110 formed in the head 100 of the implant screw A according to the present invention, a rupture induction protrusion 140 may be formed as shown in FIG. The rupture inducing protrusions 140 may protrude along the circumferential direction on the same line as the rupture grooves 120. When the rupture grooves 120 have the same degree of inclusion, A part of the head 100 of the implant screw A according to the present invention can be made to have a constant torque value for fracture.

As described above, since the fracture groove 120 is formed in the head 100 of the implant screw A according to the present invention, a part of the fracture groove 120 is broken when the constant torque value is reached by the fastening mechanism. The number of the through holes 130 formed in the coupling groove 110 and the number of the through holes 130 formed in the coupling groove 110 and the breakage inducing protrusion 140 formed in the coupling groove 100 can realize a constant torque value required in various situations The bar and the implant procedure can be performed more conveniently and quickly.

A: Implant screw B: Fixture
C: abutment
100: head 110: fastening groove
120: break groove 130: through hole
140: rupture guiding projection 200: body

Claims

A body 200 having a predetermined length and formed with threads on an outer peripheral surface thereof;
A coupling groove 110 formed at an upper end of the body 200 and having a fastening mechanism for coupling the body 200 to an object is inserted into the head 100 formed in the longitudinal direction of the body 200; / RTI >
The head 100 is formed with a fracture groove 120 which is embedded in the outer side of the coupling groove 110 along the circumferential direction so that a part thereof is broken when the constant torque value is reached by the coupling mechanism, A through hole 130 is formed in the coupling groove 110 located on the same line as the coupling hole 120 and the torque value to be broken is changed according to at least one of the number, Implant screw with constant torque value.

delete

The method according to claim 1,
Wherein the coupling groove (110) has a fracture inducing protrusion (140) protruding along the circumferential direction on the same line as the fracture groove (120).