KR101254962B1 - Instrument for fixing of cervical vertebrae - Google Patents

Instrument for fixing of cervical vertebrae Download PDF

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Publication number
KR101254962B1
KR101254962B1 KR1020110065853A KR20110065853A KR101254962B1 KR 101254962 B1 KR101254962 B1 KR 101254962B1 KR 1020110065853 A KR1020110065853 A KR 1020110065853A KR 20110065853 A KR20110065853 A KR 20110065853A KR 101254962 B1 KR101254962 B1 KR 101254962B1
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KR
South Korea
Prior art keywords
plate
cervical spine
screw
locking plate
formed
Prior art date
Application number
KR1020110065853A
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Korean (ko)
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KR20130004669A (en
Inventor
김서곤
김일
임동수
전창수
최종설
문영식
Original Assignee
주식회사 솔고 바이오메디칼
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Priority to KR1020110065853A priority Critical patent/KR101254962B1/en
Publication of KR20130004669A publication Critical patent/KR20130004669A/en
Application granted granted Critical
Publication of KR101254962B1 publication Critical patent/KR101254962B1/en

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Abstract

The present invention, in close contact with the cervical spine plate and through the screw hole formed in the plate is inserted into the cervical spine, but the head portion of the screw in the cervical spine fixing mechanism is seated in the screw hole,
The plate is coupled to the locking plate, the locking plate is rotatable to the locking position to partially or entirely shield the screw hole and the open position to open the screw hole is characterized in that to interrupt the separation of the screw according to the rotation position.
The present invention of the configuration as described above, there is an effect that can be easily prevented loosening of the screw in accordance with the rotation of the locking plate.

Description

Instrument for fixing of cervical vertebrae

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for fixing cervical vertebrae for fixing adjacent cervical vertebrae to each other, wherein the top of the screw (partially or Overall) relates to a cervical spine fixing mechanism having a locking plate that can be shielded.

In order to treat diseases such as disc detachment and narrowing of the cervical spine, cervical spine fixing devices are used.

The device for fixing the cervical spine consists of two or more screws respectively inserted into neighboring cervical vertebrae and a plate on which the screws are seated to fix the position of the cervical spine.

Referring to FIG. 1, a conventional cervical spine fixing mechanism is performed by inserting a screw into a cervical spine through a screw hole formed in a plate in a state in which the plate is in close contact with one side to fix a position between neighboring cervical spines.

The screw is formed with a wrench groove is formed in the head portion so that the wrench (Wrench) can be inserted, and a thread is formed on the outer circumferential surface of the portion inserted into the cervical spine to be inserted into the cervical spine as it is rotated.

Each screw has a head part seated in the screw hole to fix the plate to the cervical spine, but after the procedure, there is a problem that pull-out occurs that the screw is pulled out over time or due to external impact.

Therefore, the development of the cervical spine fixing mechanism that can prevent the pull-out phenomenon as described above and prevent the detachment of the screw is required.

The present invention has a locker to prevent the pull-out phenomenon in accordance with the above requirements, the locker is the main object to provide a mechanism for fixing the cervical spine that can be easily opened and closed position according to the needs of the operator.

In the present invention for achieving the above object, the plate is in close contact with the cervical spine and the screw through the screw hole formed in the plate to the cervical spine, but the head portion of the screw in the cervical spine fixing mechanism is seated in the screw hole, the A locking plate is coupled to the plate, and the locking plate is rotatable to an open position for partially or totally shielding the screw hole and an open position for opening the screw hole to intercept the separation of the screw according to the rotation position.

In addition, a mounting hole penetrates through the plate, and a protrusion is inserted into the mounting hole on the bottom surface of the locking plate, and the protrusion has a shape in which a step is formed by a difference in outer diameter along a longitudinal direction. It is elastically deformed so that the outer diameter is reduced, and is inserted into the mounting hole, and then elastically restored and bound to the mounting hole.

The protrusion has a shape in which a cutout is formed to induce elastic deformation and is divided into a plurality.

In addition, a fixing protrusion protrudes from the bottom surface of the locking plate, and a seating groove is formed in the plate, and the seating groove is formed at a position where the fixing protrusion is inserted when the locking plate is rotated to reach an open position or a locking position. do.

The fixing protrusion and the seating groove have a curved shape in which an inclination is formed at a predetermined angle.

A wrench hole is formed on the front surface of the lock plate, and further includes a dedicated wrench inserted into the wrench hole to rotate the lock plate.

The present invention having the above configuration has the effect of preventing loosening (or pulling out, etc.) of the screw easily according to the rotation of the locking plate.

The locking plate is fastened with an interference fit using elastic deformation, so that the locking plate can be easily detached from the locking plate according to the size of the screw.

The locking plate has an effect that can be fixed in the locking position and the release position by the fixing projections.

Since the fixing protrusion is curved, it is possible to easily rotate by sliding by a predetermined rotational force (without the need to remove the fixing protrusion from the seating groove).

Cervical vertebrae fixing mechanism of the present invention is provided with a dedicated wrench additionally has an effect that can rotate the locking plate more easily.

1 is a perspective view showing a state of a conventional cervical spine fixing device,
Figure 2 is an exploded perspective view of the cervical spine fixing mechanism according to a preferred embodiment of the present invention,
3 is a perspective view showing a bottom view of the locking plate of the present invention,
Figure 4 is a perspective view showing a lower view of the cervical spine fixing mechanism according to the present invention and a view showing the state when the projection of the locking plate enters the mounting hole and the state after the completion of the elastic restoration,
5 is a perspective view sequentially showing a state of rotating the locking plate using a dedicated wrench of the present invention.

Hereinafter, with reference to the drawings will be described in more detail the mechanism for fixing the cervical spine according to a preferred embodiment of the present invention.

Referring to FIG. 2, the cervical spine fixing mechanism of the present invention has a curved shape with a predetermined curvature to be in close contact with a neighboring cervical spine, and is mounted between a plurality of screw holes 23 and neighboring screw holes 23. The plate 20 and the mounting hole 21 in which the plate 20 and the hole 21 are inserted into the cervical vertebrae through the screw hole 23 and the upper head 31 is seated in the screw hole 23. It is composed of a locking plate 10 is inserted into the rotation plate to rotate to shield the screw hole (23).

The plate 20 according to the present invention has a rectangular shape in which each side is rounded to a predetermined curvature, and screw holes 23 are formed around each corner. In addition, mounting holes 21 are formed between the screw holes 23 on both sides so that the locking plates 10 may be mounted. Four mounting grooves 22 are formed around the mounting hole 21 at predetermined intervals with the mounting hole 21 therebetween. The seating groove 22 is formed in a shape in which the surface is cut into a curved surface (like egg shape).

The lower view of the locking plate 10 of the present invention is as shown in FIG. As shown, the locking plate 10 has a rectangular shape in which each side is curved at a predetermined curvature, and fixed to a size that can be inserted into the seating groove 22 of the plate 20 near each corner. The protrusion 12 protrudes.

The fixing protrusion 12 may be formed in various shapes such as hemispherical shape, egg shape or truncated pyramid shape, but the outer circumferential surface so as to slide off the seating groove 22 when the locking plate 10 is rotated. Is formed into a curved (rounded round) shape.

In the center of the locking plate 10, a protrusion 11 fitted into the mounting hole 21 is formed. The protrusion 11 is a shape in which a step is formed due to a difference in outer diameter (when entering the mounting hole) is elastically deformed to reduce the outer diameter (insertion into the mounting hole 21) and then elastically restored to the mounting hole 21 Bound to.

Therefore, the locking plate 10 is made of a material having a predetermined elasticity, but the protrusions 11 are divided into four parts by the cutouts 11 'to induce or promote elastic deformation and restoration of the protrusions 11. Each part is spaced at a predetermined interval.

That is, as shown in FIG. 4, when the protrusions 11 are fitted into the mounting holes 21, the respective portions of the protrusions 11 are elastically deformed so as to narrow the gap therebetween. It is restrained by the portion where the step is formed again by restoring elasticity, thereby being bound to the mounting hole 21.

Accordingly, the locking plate 10 is rotatably plated in a locking position in which a part of the locking plate 10 partially or entirely shields the upper side of the screw hole 23 and an open position in which the screw hole 23 is completely opened. Coupled to (20).

And, through the positioning of the seating groove 23 and / or the fixing projections 12, when the locking plate 10 is rotated to the open position or the locking position, the fixing projections 12 to the seating groove 23 It can be fixed by being fitted.

In addition, the present invention additionally provides a dedicated wrench with a pin protruding at the end to rotate the locking plate 10 more easily. In addition, a wrench hole 13 is formed in the locking plate 10 so that a pin can be fitted.

Wrench hole 13 according to the present invention is disposed two spaced apart (on the center of the projection to be a rotating shaft) on the front of the lock plate 10. In addition, two pins are formed in the dedicated wrench to rotate the locking plate 10 as illustrated in FIG. 5.

For reference, the wrench hole may be formed as a hexagonal groove or cross groove so as to use a driver or a wrench that is commonly used.

As shown in FIG. 5, after inserting the screw 30 in a state where the locking plate 10 is in the open position, the screw is partially (or entirely) shielded by using a dedicated wrench to partially or completely shield the head part of the screw 30. The pull-out phenomenon of 30 can be prevented.

Embodiments of the present invention disclosed in the specification and drawings are only presented as specific examples for clarity and are not intended to limit the scope of the invention. In addition to the embodiments disclosed herein, it is apparent to those skilled in the art that other modifications based on the technical idea of the present invention may be implemented.

10: locking plate
11: protrusion
12: fixed protrusion
20: Plate
21: mounting hole
22: settled groove
23: screw hole
30: screw

Claims (6)

  1. In the cervical spine fixing mechanism in which the plate is in close contact with the cervical spine and a screw is inserted into the cervical spine through a screw hole formed in the plate, but the head of the screw is seated in the screw hole.
    A locking plate is coupled to the plate, and the locking plate is rotatable to a locking position to partially or entirely shield the screw hole and an open position to open the screw hole, thereby interfering with the removal of the screw according to the rotation position.
    Mounting holes are penetrated through the plate, and protrusions inserted into the mounting holes are formed on the bottom surface of the locking plate.
    The protruding portion has a shape in which a step (段 差) is formed by a difference in outer diameter along a longitudinal direction, and is elastically deformed so that the outer diameter is reduced and inserted into the mounting hole, and then elastically restored to bind to the mounting hole. Instrument.
  2. delete
  3. The method of claim 1, wherein the projection is a cervical spine fixing mechanism, characterized in that the incision is formed in order to induce elastic deformation divided into a plurality.
  4. According to claim 1 or 3, wherein the fixing projection protrudes on the bottom surface of the locking plate, the seating groove is formed in the plate,
    The seating groove is fixed to the cervical spine, characterized in that when the locking plate is rotated to reach the open position or the lock position, the fixing projection is inserted into the position.
  5. 5. The cervical spine fixing mechanism according to claim 4, wherein the fixing protrusion and the seating groove have a curved shape having an inclined shape.
  6. 6. The cervical spine fixing mechanism according to claim 5, wherein a wrench hole is formed on a front surface of the locking plate, and further includes a dedicated wrench fitted to the wrench hole to rotate the locking plate.
KR1020110065853A 2011-07-04 2011-07-04 Instrument for fixing of cervical vertebrae KR101254962B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110065853A KR101254962B1 (en) 2011-07-04 2011-07-04 Instrument for fixing of cervical vertebrae

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110065853A KR101254962B1 (en) 2011-07-04 2011-07-04 Instrument for fixing of cervical vertebrae

Publications (2)

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KR20130004669A KR20130004669A (en) 2013-01-14
KR101254962B1 true KR101254962B1 (en) 2013-04-19

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101599603B1 (en) 2013-08-26 2016-03-03 경북대학교 산학협력단 Medical inserting apparatus
KR101608949B1 (en) 2014-11-19 2016-04-04 경북대학교 산학협력단 A system for fixing cervical vertebrae, an appratus for fixing cervical vertebrae and a driver used for an appratus for fixing cervical vertebrae
KR101681665B1 (en) * 2015-11-17 2016-12-02 김윤기 Cervical plate device
KR101681668B1 (en) * 2015-11-17 2016-12-02 김윤기 Cervical plate device and installation method thereof
KR101712610B1 (en) 2015-12-29 2017-03-06 경북대학교 산학협력단 A rod connecter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030040749A1 (en) 2001-08-24 2003-02-27 Grabowski John J. Bone fixation device
US20050192576A1 (en) 2001-06-06 2005-09-01 Michelson Gary K. Method for installing dynamic multilock anterior cervical plate system having detachably fastened and moveable segments
US20070043369A1 (en) 2005-03-08 2007-02-22 Wallenstein Todd M Anterior vertebral plate with underside locking mechanism
US20080021470A1 (en) 2003-10-02 2008-01-24 Zimmer Spine, Inc. Anterior cervical plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050192576A1 (en) 2001-06-06 2005-09-01 Michelson Gary K. Method for installing dynamic multilock anterior cervical plate system having detachably fastened and moveable segments
US20030040749A1 (en) 2001-08-24 2003-02-27 Grabowski John J. Bone fixation device
US20080021470A1 (en) 2003-10-02 2008-01-24 Zimmer Spine, Inc. Anterior cervical plate
US20070043369A1 (en) 2005-03-08 2007-02-22 Wallenstein Todd M Anterior vertebral plate with underside locking mechanism

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