KR101850831B1 - Pedicle screw using bone cement - Google Patents

Pedicle screw using bone cement Download PDF

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Publication number
KR101850831B1
KR101850831B1 KR1020160141625A KR20160141625A KR101850831B1 KR 101850831 B1 KR101850831 B1 KR 101850831B1 KR 1020160141625 A KR1020160141625 A KR 1020160141625A KR 20160141625 A KR20160141625 A KR 20160141625A KR 101850831 B1 KR101850831 B1 KR 101850831B1
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South Korea
Prior art keywords
main body
slot
union
bone
longitudinal direction
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KR1020160141625A
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Korean (ko)
Inventor
김종우
허성규
문진태
현 최
이성희
주병준
황보현
김일환
이예솔
원기연
서영혜
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주식회사 휴벡셀
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Priority to KR1020160141625A priority Critical patent/KR101850831B1/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7061—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant for stabilising vertebrae or discs by improving the condition of their tissues, e.g. using implanted medication or fluid exchange
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8802—Equipment for handling bone cement or other fluid fillers
    • A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)

Abstract

The present invention relates to a ball joint having a spherical shape; A body extending from the ball joint by a predetermined length and having threads formed along an outer circumferential surface thereof and fixed to the vertebral body; An injection hole formed in the longitudinal direction of the body from the outer surface of the ball joint so as to fill the bone cement; And at least one bone union slot having a predetermined width and a predetermined length, the at least one bone union slot having a predetermined width and a predetermined length, the at least one bone union slot having a predetermined width and a predetermined length, Wherein the length is coincident with the longitudinal direction of the main body and is longer than the width so as to promote bone union and to enable robust maintenance of the initially performed state of the bone cement spinal screw .

Figure R1020160141625

Description

{PEDICLE SCREW USING BONE CEMENT}

The present invention relates to a bone cement spinal screw, and more particularly, to a bone cement spinal screw for facilitating bone union and enabling robust maintenance in the initial state.

If the vertebral body is damaged due to an accident, the age-related degenerative disease progresses, or the vertebral body is damaged or twisted, the disk that is buffered between the vertebral bodies of the vertebra is pressed, It is also stressful and causes severe pain.

A fixation device for securing a vertebra such as the "bone fixation nail" (hereinafter referred to as "prior art") of Patent No. 10-1538135 inserts the nail into the vertebral body adjacent to the vertebral body, with the longitudinal bore and opening formed in the center of the nail The bone cement is discharged into the inner space of each of the vertebral bodies adjacent to the vertebral body to promote bone union.

However, in the prior art, there is a problem in that the fixing device for fixing the existing vertebrae is dislocated from the nail fixed to the vertebral bodies due to the action of the external force or the like applied by the continuous action of the patients.

Particularly, since the patient who has suffered from such a problem must undergo re-operation, the recovery is delayed and the additional operation time is increased, thereby causing a serious problem of increasing the suffering to the patient.

Patent No. 10-1538135

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a bone cement spinal screw which promotes bone union and makes it possible to maintain a solid state in the initial state.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, A body extending from the ball joint by a predetermined length and having threads formed along an outer circumferential surface thereof and fixed to the vertebral body; An injection hole formed in the longitudinal direction of the body from the outer surface of the ball joint so as to fill the bone cement; And at least one bone union slot having a predetermined width and a predetermined length, the at least one bone union slot having a predetermined width and a predetermined length, the at least one bone union slot having a predetermined width and a predetermined length, The length of the bone cement spinal screw is longer than the width of the main body.

Here, both ends of the union slot are circular arc-shaped.

At this time, the injection hole may be formed at both ends to the distal end of the main body, or may be formed at one end through the end of the main body.

The bony union slot may have an inclined surface connecting the inner edge portion starting from the inner circumferential surface of the injection hole and the outer edge portion extending to the outer surface of the body and the inclined surface may be inclined from the inner edge portion to the outer edge portion And is formed to be gradually widened.

An end surface of the inclined surface, which is cut along the longitudinal direction of the main body, is formed in a bowl shape concave from the outer surface of the main body toward the injection hole.

The plurality of slots may be formed along the longitudinal direction of the main body.

The plurality of union slots are radially arranged along the outer surface of the main body and are spaced apart from one side of the main body along the longitudinal direction of the main body.

The plurality of union slots are arranged in a line along the longitudinal direction of the main body.

The plurality of union slots may include a first slot disposed on one side of the body and having a length of a first length, a second slot spaced apart from the first slot and having a second length longer than the first length, And ... And an nth slot spaced apart from the (n-1) -th slot and having an n-th length longer than the (n-1) -th slot, the first, second, ... , n-1, and n slots are arranged in a line along the longitudinal direction of the main body.

In addition, the union slot may include an angled first corner on one side of one end of the one end of the union slot, a second edge on the other side of the other end of the one end of the union slot, And a fourth corner having an arc shape on the other of the other ends of the other end of the slot, wherein the first corner and the third corner are arranged in a straight line.

According to the present invention having the above-described configuration, the following effects can be achieved.

The present invention relates to a bone cement which is filled with bone cement through a spherical ball joint and an injection hole formed along the longitudinal direction of the main body and is discharged through a jointing slot penetrating to the outer surface of the main body, By allowing the internal tissues of the fixed vertebrae to coalesce, it promotes bone union and enables robust retention of the initially performed condition.

Particularly, the present invention provides an optimal structure that can spread well toward a vertebral body by providing a slot having a slot shape, thereby helping to maintain a firm binding force between the vertebral body and the vertebral body.

1 is a perspective view showing the overall structure of a bone cement spinal screw according to an embodiment of the present invention;
2 is a cross-sectional view showing the internal structure of a bone cement spinal screw according to an embodiment of the present invention;
3 is a cross-sectional view of the internal structure of a bone cement spinal screw according to an embodiment of the present invention,
4 is a perspective view showing the overall structure of a bone cement spinal screw according to another embodiment of the present invention.
FIG. 5 is a perspective view showing a bone cement spinal screw according to another embodiment of the present invention viewed at different points of time; FIG.
6 is a cross-sectional view showing the internal structure of a bone cement spinal screw according to another embodiment of the present invention
FIGS. 7 to 10 are views showing bone cement vertebra screws according to various embodiments of the present invention, FIGS. 7 and 8 are schematic cross-sectional views showing the internal structure, FIG. 9 is a perspective view showing the overall structure, 10 is a cross-sectional view showing the internal structure by cutting at various angles along the longitudinal direction of the main body.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings.

However, the present invention is not limited to the embodiments described below, but may be embodied in various other forms.

The present embodiments are provided so that the disclosure of the present invention is thoroughly disclosed and that those skilled in the art will fully understand the scope of the present invention.

And the present invention is only defined by the scope of the claims.

Thus, in some embodiments, well known components, well known operations, and well-known techniques are not specifically described to avoid an undesirable interpretation of the present invention.

In addition, throughout the specification, like reference numerals refer to like elements, and the terms (mentioned) used herein are intended to illustrate the embodiments and not to limit the invention.

In this specification, the singular forms include plural forms unless the context clearly dictates otherwise, and the constituents and acts referred to as " comprising (or having) " do not exclude the presence or addition of one or more other constituents and actions .

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs.

Also, commonly used predefined terms are not ideally or excessively interpreted unless they are defined.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a cross-sectional view illustrating an internal structure of a bone cement spinal screw according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of the bone cement spinal screw according to an embodiment of the present invention. Is a cross-sectional view showing another internal structure of the bone cement spinal screw according to an embodiment of the present invention.

4 is a perspective view showing the overall structure of the bone cement spinal screw according to another embodiment of the present invention, and FIG. 5 is a perspective view showing the bone cement spinal screw according to another embodiment of the present invention, And FIG. 6 is a sectional view showing the internal structure of the bone cement spinal screw according to another embodiment of the present invention.

7 to 10 are views showing a bone cement spinal screw according to various embodiments of the present invention. FIGS. 7 and 8 are schematic cross-sectional views illustrating an internal structure, FIG. 9 is a perspective view showing the overall structure And FIG. 10 is a cross-sectional conceptual view showing the internal structure by cutting at various angles along the longitudinal direction of the main body.

2 and 6 to 8 indicate that the bone cement 40 (see the dashed arrow in the drawing) flows in a direction away from the readers of the present specification.

As shown in the drawing, the present invention includes a main body 20 extending from a spherical ball joint 10 by a predetermined length and having threads 21 formed along an outer circumferential surface thereof and being fixed to a vertebral body (not shown) It can be understood that the structure includes the injection hole 30 formed in the longitudinal direction of the main body 20 from the outer surface of the ball joint 10 and the union slot 50 so that the bone cement 40 is filled .

In this case, the bone-union slot 50 is communicated with the injection hole 30 and is provided at least at the outer side of the main body 20 for the purpose of union between the bone cement 40 discharged through the injection hole 30 and the internal tissue of the vertebral body. At least one is formed through.

At this time, it is preferable that the length of the above-described union slot 50 coincides with the length direction of the main body 20 and is longer than the width.

This can be regarded as an optimal design shape for assisting in maintaining a solid fastened state by allowing the internal body of the vertebral body to be fixed with the main body 20 fixed and the bone cement 40 to be unified over a relatively large area .

In other words, the present invention can be applied to a patient suffering from degenerative spinal diseases or fractures with weak osteoporosis or bone quality, in which, when a firm fixation force can not be obtained only by fixing the main body 20 due to a weak vertebral defect, The injection hole 30 and the union slot 50 are provided to provide a facilitated and rigid fastening structure.

It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or scope of the invention.

First of all, it is provided with a housing space 61 in which the ball joint 10 is accommodated and allows the body 20 to rotate in all directions on the basis of the ball joint 10 and to fix the body 20 to the vertebral body And a coupling head 60 connected to a fixing tool (not shown).

In addition, both ends of the union slot 50 are formed in an arc shape to form a natural union structure, and to help provide a solid fastening structure between the main body 20 and the vertebral body.

Needless to say, the injection hole 30 may be formed at both ends through the distal end of the main body 20, or may be formed at one end through the distal end of the main body 20.

3, an inclined surface 50s connecting the inner edge portion starting from the inner peripheral surface of the injection hole 30 and the outer edge portion formed up to the outer surface of the main body 20 is formed in the union slot 50 And the inclined surface 50s are gradually widened from the inner edge portion to the outer edge portion, so that it is possible to obtain a rigid fastening structure due to the formation of the union structure.

The end face of the inclined face 50s cut along the longitudinal direction of the main body 20 is formed into a concave bowl shape from the outer surface of the main body 20 toward the injection hole 30, This can also help to provide a secure fastening structure so that the main body 20 is not screwed from the vertebral body and does not come off the vertebral body.

When the bone cement 40 is hardened, heat is generated. When the heat due to the curing of the bone cement 40 touches the nerve tissue, the bone cement 40 can be extremely fatal to the physician. The slot 50 is biased to the distal side of the body 20 so that the heat that is applied to the body 20 is not brought close or directly to the nerve tissue.

4 to 8, a plurality of the union slots 50 may be formed along the longitudinal direction of the main body 20. [

4 to 7, the plurality of union slots 50 are radially disposed along the outer surface of the main body 20 and extend along the longitudinal direction of the main body 20 from one side of the main body 20 toward the other side It is also possible to apply an embodiment of a structure that is arranged to be spaced apart from each other and may be arranged in a row along the longitudinal direction of the main body 20 as shown in FIG.

More specifically, the plurality of union slots 50 are disposed at one side of the main body 20, as shown in FIG. 8, and include a first slot 51 having a length of a first length, A second slot 52 having a second length greater than the first length and a third slot 53 having a third length greater than the second length, 52 and 53 may be arranged in a row along the longitudinal direction of the main body 20. [

9 and 10, the union slot 50 includes an angled first corner 53 on one side of one side of one end of the union slot 50 and a first corner 53 on the other side of the other side of the one end of the union slot 50 A third corner 55 at one side of the other end of the other end of the union slot 50 and a third corner 55 at the other end of the other end of the union slot 50, It is needless to say that an embodiment of the structure including the light emitting element 56 may be applied.

The first corner 53 and the third corner 55 are arranged in a straight line so that the main body 20 is formed by forming the union slot 50 in which both ends of the arc shape are split in the longitudinal direction into two, It is possible to prevent loosening of the fastening force between the main body 20 and the vertebral body along the direction of the thread 21 formed along the outer peripheral surface.

In other words, the structure of the first, second, third, and fourth corners 53, 54, 55, 56 is such that the main body 20 fixed to the vertebral body due to various operations of the subject, And a torque is generated in a direction opposite to the direction in which the screw is loosened in the opposite direction to the fastening direction of the fastening member, thereby helping to maintain a firm fastening force.

10, a union slot 50 having first, second, third and fourth edges 53, 54, 55 and 56 is shown in FIGS. 4 and 5, It is possible to prevent the bone cement 40, which is cured after the procedure, from being applied to the main body 20 by arranging the main body 20 at a different position on the outer circumferential surface of the main body 20, It is possible to form a bony union structure capable of maintaining a firm fastening force.

10 (b), the length in the longitudinal direction, that is, the length along the longitudinal direction of the main body 20, is longer than that in the union slot 50 of FIG. 10 (a) A substantial part of the entire length of the body 20 connected to the vertebral body can be connected to the vertebral body so that the bone cement 40 cured after the procedure can form a bony union structure capable of more firmly maintaining the fastening force.

10 (c), the first, second, third, and fourth corners 53, 54, 55, and 55, which are wider than the slot 50 of Figs. 10 (a) Since the fastening force in the direction opposite to the screwing direction in which the thread 21 of the main body 20 is fastened can be generated between the main body 20 and the vertebral body, It is possible to form a bony union structure capable of more firmly holding the fastening force by the bone cement 40 that has been cured afterwards.

As described above, it is understood that the present invention provides a bone cement spinal screw that promotes bone union and maintains a solid state in the initial state.

It will be apparent to those skilled in the art that many other modifications and applications are possible within the scope of the basic technical idea of the present invention.

10 ... ball joint
20 ... body
21 ... thread
30 ... injection hole
40 ... bone cement
50 ... union slot
50s ... slope
51 ... 1st slot
52 ... 2nd slot
53 ... 1st corner
54 ... 2nd corner
55 ... 3rd corner
56 ... fourth corner
60 ... fastening head
61 ... accommodation space

Claims (10)

Spherical ball joint;
A body extending from the ball joint by a predetermined length and having threads formed along an outer circumferential surface thereof and fixed to the vertebral body;
An injection hole formed in the longitudinal direction of the body from the outer surface of the ball joint so as to fill the bone cement; And
At least one bone union slot communicating with the injection hole and penetrating to the outside of the main body and having a predetermined width and a predetermined length is provided for the bone union between the bone cement discharged through the injection hole and the internal tissue of the vertebral body, ≪ / RTI &
The bore-
An angled first corner on one side of one side of the one end of the bone-
A second edge of the other of the two ends of the one end of the bending slot,
An angled third corner on one side of the other end of the union slot,
And a fourth edge which is arc-shaped on the other of the opposite ends of the union slot,
Wherein the first edge and the third edge are disposed in a straight line,
Wherein the length is coincident with the longitudinal direction of the main body and is longer than the width.
The method according to claim 1,
Wherein both ends of the bone-union slot are circular arc-shaped.
The method according to claim 1,
Wherein the injection hole is formed so as to penetrate through both ends to the distal end of the main body or to be formed through the end of the main body toward the distal end of the main body.
The method according to claim 1,
The bore-
An inner edge portion starting from an inner circumferential surface of the injection hole and an outer edge portion extending from an outer surface of the body to an inclined surface connecting the inner edge portion and the outer edge portion,
Wherein the inclined surface is formed to be gradually widened from the inner edge portion toward the outer edge portion.
The method of claim 4,
Wherein an end surface of the inclined surface cut along the longitudinal direction of the main body is formed in a bowl shape concave from the outer surface of the main body toward the injection hole.
The method according to claim 1,
Wherein the bone-union slot is formed in a plurality of along the longitudinal direction of the main body.
The method of claim 6,
Wherein the plurality of bony union slots are radially disposed along the outer surface of the main body and are spaced apart from one side of the main body along the longitudinal direction of the main body to the other side.
The method of claim 6,
And a plurality of the bone-union slots are arranged in a line along the longitudinal direction of the main body.
The method of claim 6,
The plurality of union slots
A first slot disposed on one side of the body and having a length of a first length,
A second slot spaced apart from the first slot and having a second length greater than the first length,
... ,
And an nth slot spaced apart from the (n-1) -th slot and having an n-th length longer than the (n-1) -th slot,
The first, second, ... , n-1, n slots are arranged in a line along the longitudinal direction of the main body.
delete
KR1020160141625A 2016-10-28 2016-10-28 Pedicle screw using bone cement KR101850831B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110478015A (en) * 2019-07-30 2019-11-22 张家港市中医医院 It is fixed in a kind of centrum to form device with balloon cone cavity

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110002424A (en) * 2009-07-01 2011-01-07 비이더만 모테크 게엠베하 ＆ 코. 카게 Instruments for use with a bone anchor with plug member
US20130144344A1 (en) * 2010-06-15 2013-06-06 Rinaldo Giancola Device for selective biological synthesis of a bone tissue
KR20130072504A (en) * 2011-12-22 2013-07-02 (주)오티스바이오텍 Poly hole screw for injecting bone cement
KR101538135B1 (en) 2006-11-10 2015-07-29 비이더만 테크놀로지스 게엠베하 & 코. 카게 Bone Anchoring Nail

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101538135B1 (en) 2006-11-10 2015-07-29 비이더만 테크놀로지스 게엠베하 & 코. 카게 Bone Anchoring Nail
KR20110002424A (en) * 2009-07-01 2011-01-07 비이더만 모테크 게엠베하 ＆ 코. 카게 Instruments for use with a bone anchor with plug member
US20130144344A1 (en) * 2010-06-15 2013-06-06 Rinaldo Giancola Device for selective biological synthesis of a bone tissue
KR20130072504A (en) * 2011-12-22 2013-07-02 (주)오티스바이오텍 Poly hole screw for injecting bone cement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110478015A (en) * 2019-07-30 2019-11-22 张家港市中医医院 It is fixed in a kind of centrum to form device with balloon cone cavity
CN110478015B (en) * 2019-07-30 2023-09-15 张家港市中医医院 Balloon type cone cavity forming device for fixing vertebral body

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