KR101700672B1

KR101700672B1 - Pedicle screw module

Info

Publication number: KR101700672B1
Application number: KR1020160009106A
Authority: KR
Inventors: 김정엽
Original assignee: 김정엽
Priority date: 2016-01-26
Filing date: 2016-01-26
Publication date: 2017-01-31

Abstract

The present invention relates to a pedicle screw module including a head portion in which a cavity having a predetermined size is formed with an open pass hole formed in a lower portion of the cavity and a screw including a screw portion where a screw thread is formed in its outer peripheral surface and a joint portion formed at an upper end of the screw portion and positioned in the cavity, in which the joint portion includes a plurality of first joint units separated at a predetermined distance from each other and fastened by elastic means, each of which has a first recessed groove formed in a circumferential direction on a circumference of an outer peripheral surface and a second recessed groove formed in the circumferential direction below the first recessed groove, and further includes a pressing unit fastened to surround the first joint units through the first recessed groove and the second recessed groove and inserted into the cavity by pressing the first joint units from the outside to the inside and the pressing unit includes a first housing formed in an arc shape to surround the first recessed grooves of the first joint units and a second housing disposed below the first housing to be rotatable in a direction symmetrical to the first housing while facing and corresponding to the first housing and formed in an arc shape to surround the second recessed grooves of the first joint units. The pedicle screw module according to the present invention facilitates a surgical procedure for a person to undergo the surgical procedure based on convenient and firm fastening.

Description

Pedicle screw module [0002]

[0001] The present invention relates to a pedicle screw module, and more particularly, to a pedicle screw module capable of being firmly engaged with a joint portion and a head portion, and being operable on a vertebra of a subject.

The pedicle screw is divided into a mono type in which the screw and the head are integrally formed, and a polyaxial type in which the screw and the head are separately assembled to allow a predetermined rotation between the screw and the head. Because the shape of the vertebra (where the pedicle screw is to be inserted) is not constant for each patient and depending on the location of the procedure, the surgeon may insert the pedicle screw more easily, Polyexial-type pedicle screws are widely used so that they can be inserted into areas that can not be used.

However, the mono-type pedicule screw does not cause unnecessary shaking (or torsion) between the head part and the screw after the head part and the screw are integrally formed and inserted into the vertebra. However, in the case of the poly-axial type pedicule screw There was a possibility of shaking between the head and the screw due to the load and impact acting on the vertebrae (depending on the patient's activity). That is, since the joint portion is in the form of a ball (almost entirely smooth on the surface), unexpected sudden twist or breakage may occur between the head portion and the screw due to sudden movement of the patient or external impact and load .

In the conventional poly-axial type pedicel screw shown in Fig. 1A, when the screw portion on the lower end side of the screw is inserted in the upper side of the head portion (the side where the mounting groove on which the vertebral rod is mounted), the rim of the pass hole A washer is additionally mounted in the cavity (internal mounting space) of the head portion where the joint portion is seated so that the spinal rod coupled to the head portion by the fixing member can press the joint portion Depending on the product, the spinal rod may be spaced apart without pushing the washer to permit rotation of the screw. The joint portion is formed in a thread groove (or a wrench groove) so as to be fixed by a wrench or a driver and is rounded so as to be movable in the head portion. The washer has a surface in contact with the joint portion along the curvature of the joint portion It is a rounded shape). On the other hand, in the cavity in which the joint portion is inserted in the fixing member, the elastic member can be selectively inserted so as to eliminate the occurrence of the gap and prevent the abrasion.

However, in the pedicle screw of the conventional configuration, since the screw is inserted from the upper side of the head portion, the diameter of the thread portion increases from D1 (pass through hole) to D2 (pass hole can not pass) The head portion of the same size could not be used. That is, the size of the head portion has to be increased according to the screw diameter of the screw. This may lead to unnecessary weight and size increase, which may adversely affect the affected part.

In order to solve such a problem, Korean Patent No. 10-1178489 discloses a head having a cavity formed with a certain size inside and having a pass hole opened to a lower portion of the cavity, a screw having a thread formed on the outer circumferential surface thereof, Wherein the inner diameter of the pass hole is formed to be smaller than a maximum outer diameter of the joint portion and the joint portion is formed so that the outer diameter of the pass hole is elastically reduced in accordance with the pressure applied from the outside of the joint portion, Discloses a technique of forming a split gap and elastically restoring a joint portion having reduced outer diameter due to interference when the hollow portion is inserted into the cavity through the pass hole.

However, in this conventional technique, strong pressing force of the practitioner is required in the process of forcing the joint portion into the cavity by using the division gap. Particularly, it is not easy to insert such a pressing force into the cavity while wearing surgical gloves or the like that are not bare hands.

However, if the resilient restoring force of the joint portion is weak due to the divided gap, the detachment phenomenon may occur after the insertion of the cavity.

In addition, since the support pin to be inserted into the joint portion of the pedicle screw is very small in size, it is very likely that the support pin may flow into the internal organs accidentally during the procedure. It is very cumbersome and is likely to lead to medical accidents.

Therefore, there is a disadvantage that handling of the pedicle screw and safe operation are not easy.

Korean Patent No. 10-1178489

An object of the present invention is to provide a pedicule screw module which can easily and firmly fasten pedicle screws to a subject to be treated easily.

It is another object of the present invention to provide a pedicle screw module that can eliminate unnecessary members on a pedicle screw, simplify the structure of the pedicle screw, and prevent medical errors that may occur during the procedure.

The present invention relates to an ink jet recording head comprising: a head portion having a cavity formed therein with a predetermined size and a pass hole opened to a lower portion of the cavity; And a screw having a screw thread formed on an outer circumferential surface thereof and a joint portion formed at an upper end of the screw portion and positioned inside the cavity, wherein the joint portions are provided in plural, spaced apart from each other by elastic means, And a first joint unit having a first recessed groove formed in a circumferential direction around the outer circumferential surface and a second recessed groove formed in a circumferential direction below the first recessed groove, And a pressing unit coupled to the first joint units to surround the first joint units through the second recessed grooves and inserted into the cavities by pressing the first joint units from the outside to the inside, A first housing formed in an arcuate shape to surround the first recessed grooves of the first joint units, and a second housing coupled to the first housing, And a second housing formed below the first housing so as to be rotatable in a direction symmetrical to the housing and formed in an arc shape so as to surround the second recessed groove of the first joint units, .

The joint unit may further include a second joint unit located at a predetermined distance from the first joint units at a central portion of the first joint units and being bound to each of the first joint units by elastic means have.

In addition, the first housing has a first bent groove in which the first joint unit is inserted, a first insertion protrusion 31b is protruded at one end, and a first insertion hole 31a is formed at the other end in the longitudinal direction A second insertion groove is formed in one end of the second housing and a second insertion protrusion is formed in the other end of the second housing to fit the first insertion hole 31a, A second insertion hole through which the first insertion protrusion 31b is inserted may be formed in the longitudinal direction.

In addition, the first housing and the second housing may have protrusions formed on the outer circumferential surface thereof for the rotation operation of the first housing and the second housing, respectively.

Further, the head portion is formed on at least a portion of the inner circumferential surface, an elongated groove corresponding to the handle portion of the pressing unit bound to the screw is formed as an upper portion and a lower portion, respectively, The grip portion is moved in the elongated groove based on the resilient restoring force of the joint portion and the first housing and the second housing are operated to press the inner circumferential surface of the head portion outwardly based on the elastic restoring force of the joint portion .

The pedicle screw module according to the present invention has the following effects.

First, there is an effect that the pedicle screw can be more easily and firmly tied and can be easily performed to a patient to be treated.

It is possible to eliminate the unnecessary members on the pedicle screw, simplify the structure of the pedicle screw, and prevent medical malfunction that may occur during the procedure.

1 is an exploded perspective view illustrating a pedicle screw module according to an embodiment of the present invention.
2 is an exploded plan view showing another pedicle screw module in Fig.
FIG. 3 is a perspective view schematically showing a state in which a pressing member among the structures of the pedicle screw module according to FIG. 1 is engaged with a joint portion.
FIG. 4 is a plan view schematically showing a state in which a pressing member among the structures of the pedicle screw module according to FIG. 1 is engaged with a joint portion.
5 is an exploded plan view showing a pedicle screw module according to another embodiment of the present invention.
FIG. 6 is an exploded perspective view showing another pedicle screw module shown in FIG. 5. FIG.
FIG. 7 is an assembled perspective view illustrating another pedicle screw module in FIG. 5; FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. The scope of technical thought is not limited to the following examples. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the scope of the invention to those skilled in the art. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items. The same reference numerals denote the same elements at all times. Further, various elements and regions in the drawings are schematically drawn. Accordingly, the technical spirit of the present invention is not limited by the relative size or spacing depicted in the accompanying drawings.

1 is an exploded perspective view showing a pedicle screw module 100 according to an embodiment of the present invention. 2 is an exploded plan view showing another pedicle screw module 100 in Fig. FIG. 3 is a perspective view schematically showing a state in which the pressure unit 130 of the pedicle screw module 100 according to FIG. 1 is bound to the joint portion 121. 4 is a plan view schematically showing a state in which the pressurizing unit 130 of the pedicle screw module 100 according to FIG. 1 is engaged with the joint portion 121. FIG.

1 and 2, the pedicle screw module 100 includes a head 110, a screw 120, a pressing unit 130, and a fixing unit 140, Includes a screw portion (122) and a joint portion (121). The joint unit 121 may include a first joint unit 1211 and a second joint unit 1212. The pressing unit 130 may include a first housing 131 and a second housing 132.

A cavity may be formed in the head 110 to a predetermined size, and a pass hole may be formed in a lower portion of the cavity. The screw 120 may be formed at the upper end of the threaded portion 122 and may be located inside the cavity.

As shown in FIG. 3, the first joint units 1211 of the joint part 121 are provided in plural and can be bound to the elastic means E while being spaced apart from each other by a predetermined distance. A first recessed groove 1211a may be formed around the outer circumferential surface of the first joint units 1211 in the circumferential direction. A second recessed groove 1211b may be formed in a lower portion of the first recessed groove 1211a to correspond to the first recessed groove in the circumferential direction.

The second joint unit 1212 may be spaced apart from the first joint units 1211 at a central portion of the first joint units 1211. The second joint unit 1212 may be coupled to each of the first joint units 1211 by elastic means E. [

4, the pressing unit 130 may be bound to surround the first joint units 1211 through the first recessed groove 1211a and the second recessed groove 1211b. The pressurizing unit 130 may be inserted into the cavity while pressing the first joint units 1211 inwardly from the outside.

More specifically, in the pressing unit 130, the first housing 131 may be formed in an arcuate shape so as to surround the first recessed groove 1211a of the first joint units 1211. At this time, the first housing 10 is formed with a first bent groove in which the first joint unit 1211 is fitted, a first insertion protrusion 131b is protruded at one end and a first insertion protrusion 131b is formed at the other end, And an insertion hole 131a may be formed through the hole in the longitudinal direction.

The second housing 132 is installed below the first housing 131 so as to be rotatable in a direction symmetrical to the first housing 131 while facing the first housing 131 . The second housing 132 may be formed in an arcuate shape so as to surround the second recessed groove 1211b of the first joint units 1211.

The second housing 132 is formed with a second bending groove in which the first joint unit 1211 is inserted. The second housing 132 has a second insertion protrusion 132b fitted in the first insertion hole 131a, Can be formed. At the other end, a second insertion hole 132a through which the first insertion projection 131b is inserted may be formed in the longitudinal direction.

The first housing 131 and the second housing 132 are formed with protrusions 133a and 133b on the outer circumferential surface for rotating the first housing 131 and the second housing 132, . The head portion 110 has an elongated groove (not shown) corresponding to the grip portions 133a and 133b of the pressing unit 130 coupled to the screw 120 on at least a part of the inner circumferential surface, Respectively.

That is, after the pushing unit 130 is inserted into the head part 110, the grip part is moved in the elongated groove based on the elastic restoring force of the joint part 121, 131 and the second housing 132 may be operated to press the inner circumferential surface of the head portion 110 outwardly based on the elastic restoring force of the joint portion 121. [

5 is an exploded plan view showing a pedicle screw module 200 according to another embodiment of the present invention. FIG. 6 is an exploded perspective view showing another pedicle screw module 200 shown in FIG. FIG. 7 is an assembled perspective view illustrating another pedicle screw module 200 shown in FIG.

Hereinafter, description will be made with reference to the drawings, focusing on technically different parts. 5 to 7, the pressing unit 230 of the pedicle screw module 200 may further include a first auxiliary housing 231c and a second auxiliary housing 232c.

A plurality of first joint units 2211 are provided on the joint portion 221 of the pedicle screw module 200 and are spaced apart from each other by a predetermined distance and bound by elastic means E, The recessed groove can be formed.

The pressurizing unit 230 is bound to surround the first joint units 2211 through the recessed grooves and presses the first joint units 2211 from the outside to the inside and presses the inside of the cavity of the head unit 210 Can be inserted.

The operation principle of the pressurizing unit 230 is schematically described as follows. That is, the second housing 231 and the second housing 232 are stacked on one another, and the second housing 231 and the second housing 232 are coupled to each other so as to surround the outer circumferential surface of the joint portion 221 . The second housing 232 may be positioned at the lower end of the first housing 231 and the handle 233b of the second housing 232 may be pushed clockwise to move the other non- .

At this time, the second insertion protrusion 232b of the second housing 232 is guided by the arc of the first insertion hole 231a toward the other side of the first housing 231, The portion of the second insertion hole 231a in which the first insertion protrusion 231b of the first housing 231 is inserted is wrapped around the outer circumferential portion of the joint portion 221 which is not in contact with the rotation.

The first housing 231 and the second housing 232 may have a circular shape in the shape of a semicircular arc when viewed from above, and may be enclosed by surrounding the outer circumferential surface of the joint portion 221. The rotation radius of the second housing 232 may be equal to the length of the second insertion hole 232a or the first insertion hole 231a.

The first housing 231 and the joint portion 221 which the second housing 232 surrounds as the second housing 132 is rotated further after the second housing 232 is rotated, Some part can be tightened more tightly.

The recessed groove includes a first recessed groove 2211a, a second recessed groove 1211b formed in the lower portion of the first recessed groove 2211a in the circumferential direction, and a second recessed groove 1211b formed in the lower portion of the second recessed groove 1211b in the circumferential direction And a third recessed groove 1211c formed in the recessed portion.

The first housing 231 of the pressing unit 230 may be formed in an arcuate shape so as to surround the first recessed groove 2211a or the second recessed groove 2211b of the first joint units 2211 . The second housing 232 is provided below the first housing 231 so as to be rotatable in a direction symmetrical to the first housing 231 while facing the first housing 231, And may be formed in an arc shape so as to surround the recessed grooves of the first joint units 2211.

The second housing 232 may be bound to surround the second recessed groove 2211b when the first housing 231 is bound to surround the first recessed groove 2211a, When the housing 231 is bound to enclose the second impregnation 2211b, the third impregnation groove 2211c may be enclosed.

The first housing 231 is formed in an arc shape so as to surround the first recessed groove 2211a of the first joint units 2211 and the first auxiliary housing 231c, Can be inserted into the first recessed groove 2211a so as to be stepped inside the first housing 231. [

The second housing 232 is installed below the first housing 231 so as to be rotatable in a direction symmetrical to the first housing 231 while facing the first housing 231 And an arc shape to surround the second recessed groove 2211b of the first joint units 2211. The second auxiliary housing 232c is extended to step inside the second housing 232 And can be inserted into the second receiving groove 2211b.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

110: head portion
120: Screw
121: joint part
122:
1211: First joint unit
1212: second joint unit
1211a: First Ship
1211b: second recessed groove
130: pressure unit
131: first housing
132: second housing
140: fixed unit
L: Load
E: Elastic means

Claims

A head portion having a cavity formed at an inner side thereof with a predetermined size and a pass hole formed at a lower portion of the cavity; And
And a screw including a screw portion formed on the outer circumferential surface thereof and a joint portion formed on an upper end of the screw portion and positioned inside the cavity,
The joint portion
A first recessed groove formed circumferentially around the outer circumferential surface and a second recessed recess formed circumferentially at a lower portion of the first recessed groove, A first joint unit,
Further comprising a pressing unit coupled to enclose the first joint units through the first recessed groove and the second recessed groove and inserted into the cavity by pressing the first joint units from the outside to the inside,
The pressure unit includes:
A first housing formed in an arcuate shape to surround the first recessed groove of the first joint units,
A first housing provided with a first housing and a second housing, the housing having a first housing and a second housing, the first housing having a first housing and a second housing, And a second housing formed in the first housing.

The method according to claim 1,
The joint portion
Further comprising a second joint unit located at a predetermined distance from the first joint units at a central portion of the first joint units and coupled to each of the first joint units by elastic means.

3. The method of claim 2,
The first housing includes:
A first insertion groove is formed at one end of the first joint unit and a first insertion hole is formed at the other end of the first joint unit,
The second housing includes:
A second insertion groove is formed at one end of the first joint unit, and a second insertion bore is formed at one end of the second insertion bore. The other end of the second insertion bore is fitted with the second insertion bore, And a pedicle screw module formed in the longitudinal direction.

The method of claim 3,
Wherein the first housing and the second housing have protrusions formed on an outer circumferential surface of the first housing and the second housing, respectively, for rotating the first housing and the second housing.

The method of claim 3,
The joint portion
Further comprising a bridge unit in which the first joint unit is installed upward and the screw unit is provided in a downward direction,
Wherein the first joint units are capable of sliding in a sliding manner from an outer side to a central axis on the bridge unit with respect to a virtual center axis of the joint portion, wherein the first joint units are installed such that an elastic restoring force acts thereon.