CN104825218A - Y-axis one-way pedicle screw - Google Patents
Y-axis one-way pedicle screw Download PDFInfo
- Publication number
- CN104825218A CN104825218A CN201510245920.4A CN201510245920A CN104825218A CN 104825218 A CN104825218 A CN 104825218A CN 201510245920 A CN201510245920 A CN 201510245920A CN 104825218 A CN104825218 A CN 104825218A
- Authority
- CN
- China
- Prior art keywords
- axis
- pedicle screw
- screw
- transverse planes
- shaped collecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
-
- 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
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
-
- 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
Abstract
The invention relates to the technical field of spine correcting and internal fixing devices, in particular to a Y-axis one-way pedicle screw; the Y-axis one-way pedicle screw comprises a fixed seat and a screw body; a U-shaped holding gap is formed in the upper part of the fixed seat along the axial direction of the fixed seat; a spherical groove is formed in the fixed seat and is located below the U-shaped holding gap; the screw body comprises a spherical head part and a threaded rod part; the spherical head part is held in the spherical groove; two symmetrical first transverse planes are formed in the spherical groove along the arrangement direction parallel to two openings of the U-shaped holding gap; second transverse planes are arranged on the symmetrical sidewalls of the spherical head part; the first transverse planes and the second transverse planes are adhered mutually. According to the Y-axis one-way pedicle screw disclosed by the invention, by arranging the first transverse planes and the second transverse planes, the screw can only be moved along the direction parallel to the insertion of a fixed connection rod relative to the fixed seat; the problems that a stress is applied difficultly and the spine cannot be bent laterally to operate rotationally due to the adoption of a universal axis structure, or the problems that the fixed connection rod is placed difficultly and the operative speed is slow due to the adoption of a fixed axis structure are prevented.
Description
Technical field
The present invention relates to spine correcting and inner fixing device technical field, the unidirectional pedicle screw of especially a kind of Y-axis.
Background technology
Pedicle screw is a kind of medical device be widely used in the spine correcting operations such as cervical vertebra, thoracic vertebra, lumbar vertebra, several screws are squeezed in the selected side of patient's deformity spinal column, re-use one or more stationary links and each screw links, by this stationary links application lever principle, the three-dimensional space maneuver use traction, reversing, reset, by the spine correcting of dystopy, to recovering normal spinal column sequence and height, the object reaching orthopedic, fix.
At present, the version of pedicle screw used on the market is generally divided into two classes: a class is fixed axle structure (as shown in Figure 1), and a class is universal shaft structure (as shown in Figure 2); Wherein, fixed axle structure before use, doctor must consider screw in detail and be assemblied in each epispinal action, thus must pierce or be screwed in spinal column with a special angle, to ensure that screw is accurately to locate, recycling stationary links runs through wherein, but sometimes because when many nails put nail, the screw on the same longitudinal axis cannot be kept to be placed on same straight line, to cause difficulty when putting stationary links; Thus, operation process needs considerable time, increases the complexity of operation, even needs repeatedly to carry out after operation failure; And although universal shaft structure adds the degree of freedom of head of screw to a certain extent, connecting rod can be connected and fixed without the need to carrying out accurate positioning instant, but, but dynamics and the angle of force cannot be controlled carrying out rotating force to single spinal column, when carrying out distraction reduction force between multiple spinal column, especially when vertebral fracture carries out distraction reduction between vertebral body, cannot parallel opening be carried out, therefore corpus vertebrae replacement poor effect.
Therefore, be necessary to propose improvement project, to meet the actual use needs in operation process to existing vertebral pedicle bolt structure.
Summary of the invention
For the deficiency that above-mentioned prior art exists, the object of the present invention is to provide that a kind of structure is simple, force control is convenient, screw can make the unidirectional pedicle screw of Y-axis of unidirectional angular adjustment along X-axis (namely perpendicular to the direction of insertion of stationary links).
To achieve these goals, the present invention adopts following technical scheme:
The unidirectional pedicle screw of a kind of Y-axis, it comprises holder and the body of screw, the top of described holder axially offers a U-shaped collecting breach along it, described holder below that is interior, that be positioned at U-shaped collecting breach offers a rounded channels, the described body of screw comprises ball head and threaded shank, and described ball head is placed in rounded channels;
Two symmetrical the first transverse planes are formed in described rounded channels, along the arranged direction perpendicular to two openings of U-shaped collecting breach, the symmetrical side of described ball head is provided with the second transverse plane, described first transverse plane attaches mutually with the second transverse plane.
Preferably, described rounded channels and U-shaped collecting breach connect.
Preferably, the position that described U-shaped collecting breach is connected with rounded channels is provided with for by the locating part of ball head involution in rounded channels, and the upper surface of described locating part offers and to be full of the arch groove closed with the bottom surface of U-shaped collecting breach mutually.
Preferably, the groove face of described arch groove is matsurface structure.
Preferably, axially through hole is offered along it in described threaded shank.
Preferably, the top outer wall of described holder offers locked groove.
Owing to have employed such scheme, the present invention passes through the setting of the first transverse plane and the second transverse plane, screw can only be moved along the direction of inserting perpendicular to stationary links relative to holder, avoid and to cause force difficulty owing to adopting universal shaft structure, the problem that vertebral body removes rotation process cannot be carried out, or cause owing to adopting fixed axle structure stationary links to place difficulty, the slow problem of operative speed; Its structure is simple, easy to operate, is particularly useful in scoliosis orthomorhia, has very strong practicality.
Accompanying drawing explanation
Fig. 1 is the structural representation of the pedicle screw adopting fixed axle structure in prior art;
Fig. 2 is the structural representation of the pedicle screw adopting universal shaft structure in prior art;
Fig. 3 be the embodiment of the present invention face cross section structure schematic diagram;
Fig. 4 is that cross section structure schematic diagram is looked on a left side for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As shown in Figure 3 and Figure 4, the unidirectional pedicle screw of a kind of Y-axis that the present embodiment provides, it comprises holder 10 and the body of screw 20, a U-shaped collecting breach 11 passed for confession stationary links is offered along its axis on the top of holder 10, in holder 10, the below that is positioned at U-shaped collecting breach 11 offers a rounded channels 12, the body of screw 20 then comprises ball head 21 and threaded shank 22, and ball head 21 is placed in rounded channels 12; In rounded channels 12, along being formed with two symmetrical the first transverse planes 13 perpendicular to the arranged direction of two openings of U-shaped collecting breach 11, accordingly, the symmetrical side of ball head 21 is provided with the second transverse plane 23, first transverse plane 13 attach with the second transverse plane 23 phase.So, with the arranged direction of two openings of U-shaped collecting breach 11 for benchmark, namely Y direction is defined as, now, first transverse plane 13 and the second transverse plane 23 are all in X-direction, so, the body of screw 20 can only move in the X-axis direction (also can be regarded as the direction of insertion perpendicular to stationary links), and can not move to other directions, when carrying out multiple spine dilation reset, can avoid occurring that conventional screw causes force application angle and size cannot carry out the problem of conservative control owing to adopting universal shaft structure; Meanwhile, also can avoid causing stationary links to insert the problem of difficulty owing to adopting fixed axle structure.
For ease of carrying out processing, the assembling of screw, rounded channels 12 and the U-shaped collecting breach 11 of the present embodiment connect, so that be assemblied in rounded channels 12 by ball head 21.In order to prevent ball head 21 under the effect of external force, ejected by U-shaped collecting breach 11, and affect operation technique, be provided with at the position that U-shaped collecting breach 11 is connected with rounded channels 12 for by the locating part 30 of ball head 21 involution in rounded channels 12, offer at the upper surface of locating part 30 and to be full of the arch groove 31 closed with the bottom surface of U-shaped collecting breach 11 mutually.Meanwhile, the groove face of the arch groove 31 of the present embodiment can be set to matsurface structure, to ensure that ball head 21 has certain frictional resistance, facilitates doctor to operate in operation.
For improving the recovery effects after operation in patients and improving the assembling effect of screw in art, in threaded shank 22, axially also offer through hole 24 along it.And for the ease of stationary links being locked on corresponding screw, the top outer wall of holder 10 also offers locked groove 14.
Based on said structure, the screw fusion of the present embodiment advantage of two kinds of pedicle screws (i.e. fixed axle structure and universal shaft structures), make it can be easy in actual applications install stationary links, do not affect again the effect of scoliosis rotation-removing orthopedic.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. the unidirectional pedicle screw of Y-axis, it comprises holder and the body of screw, the top of described holder axially offers a U-shaped collecting breach along it, described holder below that is interior, that be positioned at U-shaped collecting breach offers a rounded channels, the described body of screw comprises ball head and threaded shank, and described ball head is placed in rounded channels; It is characterized in that:
Two symmetrical the first transverse planes are formed in described rounded channels, along the arranged direction perpendicular to two openings of U-shaped collecting breach, the symmetrical side of described ball head is provided with the second transverse plane, described first transverse plane attaches mutually with the second transverse plane.
2. the unidirectional pedicle screw of a kind of Y-axis as claimed in claim 1, is characterized in that: described rounded channels and U-shaped collecting breach connect.
3. the unidirectional pedicle screw of a kind of Y-axis as claimed in claim 2, it is characterized in that: the position that described U-shaped collecting breach is connected with rounded channels is provided with for by the locating part of ball head involution in rounded channels, the upper surface of described locating part offers and to be full of the arch groove closed with the bottom surface of U-shaped collecting breach mutually.
4. the unidirectional pedicle screw of a kind of X-axis as claimed in claim 3, is characterized in that: the groove face of described arch groove is matsurface structure.
5. the unidirectional pedicle screw of a kind of Y-axis according to any one of claim 1-4, is characterized in that: axially offer through hole along it in described threaded shank.
6. the unidirectional pedicle screw of a kind of Y-axis as claimed in claim 5, is characterized in that: the top outer wall of described holder offers locked groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510245920.4A CN104825218A (en) | 2015-05-14 | 2015-05-14 | Y-axis one-way pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510245920.4A CN104825218A (en) | 2015-05-14 | 2015-05-14 | Y-axis one-way pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104825218A true CN104825218A (en) | 2015-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510245920.4A Pending CN104825218A (en) | 2015-05-14 | 2015-05-14 | Y-axis one-way pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104825218A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203369955U (en) * | 2013-07-17 | 2014-01-01 | 上海拓腾医疗器械有限公司 | Single-axis pedicle screw |
| CN204863434U (en) * | 2015-05-14 | 2015-12-16 | 林健泽 | One -way pedicle of vertebral arch screw of Y axle |
-
2015
- 2015-05-14 CN CN201510245920.4A patent/CN104825218A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203369955U (en) * | 2013-07-17 | 2014-01-01 | 上海拓腾医疗器械有限公司 | Single-axis pedicle screw |
| CN204863434U (en) * | 2015-05-14 | 2015-12-16 | 林健泽 | One -way pedicle of vertebral arch screw of Y axle |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150812 |
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| RJ01 | Rejection of invention patent application after publication |