CN103040515A - Multi-axial spinal screw - Google Patents
Multi-axial spinal screw Download PDFInfo
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- CN103040515A CN103040515A CN2012105771196A CN201210577119A CN103040515A CN 103040515 A CN103040515 A CN 103040515A CN 2012105771196 A CN2012105771196 A CN 2012105771196A CN 201210577119 A CN201210577119 A CN 201210577119A CN 103040515 A CN103040515 A CN 103040515A
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- hole
- screw
- spherical head
- ball screw
- seat
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Abstract
The invention discloses a multi-axial spinal screw which comprises a U-shaped screw seat and a ball screw. The ball screw comprises a spherical head and a screw body, a through hole is arranged at the bottom of the U-shaped screw seat, a retaining sleeve is arranged in the U-shaped screw seat and positioned above the through hole, the diameter of the through hole is smaller than that of the spherical head, the screw body can assuredly extend out of the through hole owing to the diameter of the through hole, a spherical mounting cavity matched with the spherical head is formed between the bottom of the retaining sleeve and the U-shaped screw seat and is positioned above the through hole, and the spherical head of the ball screw is mounted in the spherical mounting cavity and can rotate in the spherical mounting cavity. The multi-axial spinal screw has the advantages that the aperture of the through hole at the bottom of the U-shaped screw seat is smaller than the diameter of the spherical head of the ball screw, the spherical head cannot slip out of the through hole, accordingly, the reliability and the stability of connection between the ball screw, the U-shaped screw seat and the retaining sleeve are greatly improved, and risk factors of a surgery for implanting the spinal screw into a human body are greatly reduced.
Description
Technical field
The present invention relates to medical instruments field, employed spinal column multi-axial screws when relating in particular to a kind of orthopaedics internal fixation operation treatment.
Background technology
Heredity, abnormal development, wound, chronic stress and tumor and Other diseases can cause the pathological condition of spinal column, and this has reduced the pliability of spinal column, have dwindled the range of movement of spinal column.Adopting the surgery internal fixation operation that above-mentioned pathological condition is treated is the Therapeutic Method of medically commonly using at present.The spinal column multi-axial screws many at spinal columns such as thoracic vertebra, lumbar vertebra, waist sacrum, iliums front road and the internal fixation operation of the way of escape in use.The structure of the spinal column multi-axial screws that uses at present comprises: staple seat and ball screw, wherein ball screw is made of spherical head and screw body two parts, the bottom of staple seat is provided with through hole, the aperture of through hole is not less than the diameter of spherical head, be provided with the interstage sleeve with the sphere installation cavity in the staple seat of through hole top, the spherical head of ball screw stretches to from through hole in the sphere installation cavity in the interstage sleeve, and can in the sphere installation cavity, rotate, between through hole and spherical head, be provided with jump ring, jump ring with the spherical head block in the sphere installation cavity, and prevention spherical head slippage from through hole.The shortcoming of the spinal column multi-axial screws of said structure is as follows: because the probability of jump ring slippage from the through hole of nail seat is relatively large, in case jump ring is slippage from through hole, ball screw and nail seat and interstage sleeve will come off mutually, therefore rely on that jump ring is relatively low with the structural reliability that ball screw combines with nail seat, less stable, brought potential safety hazard to the multi-axial screws implant into body.
Summary of the invention
The technical issues that need to address of the present invention are: the spinal column multi-axial screws that provides a kind of simple in structure, reliability and stability all greatly to improve.
For addressing the above problem, the technical solution used in the present invention is: the spinal column multi-axial screws, comprise: staple seat and ball screw, wherein ball screw is made of spherical head and screw body two parts, the bottom of staple seat is provided with through hole, be provided with interstage sleeve in the staple seat of through hole top, the diameter of through hole is less than the diameter of spherical head, and can guarantee that screw body can stretch out from through hole, the sphere installation cavity that formation matches with spherical head between the staple seat of interstage sleeve bottom and through hole top, the spherical head of ball screw is installed in the sphere installation cavity, and can in the sphere installation cavity, rotate.
Beneficial effect of the present invention: diameter less than the ball screw spherical head is arranged in the aperture of the through hole of staple seat bottom, spherical head can slippage from through hole, therefore connection reliability and the stability between ball screw and nail seat and the interstage sleeve improves greatly, has reduced the operation risk coefficient in the spinal screw implant into body.
Description of drawings
Fig. 1 is the structural representation of spinal column multi-axial screws of the present invention.
Fig. 2 is the structural representation of the interstage sleeve among Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing and optimum embodiment the present invention is described in further detail.
Such as Fig. 1, shown in Figure 2, the spinal column multi-axial screws, comprise: staple seat 1 and ball screw 2, wherein ball screw 2 is made of spherical head 21 and screw body 22 two parts, the bottom of staple seat 1 is provided with through hole 3, be provided with interstage sleeve 4 in the staple seat 1 of through hole 3 tops, the diameter of through hole 3 is less than the diameter of spherical head 21, and can guarantee that screw body 22 can stretch out from through hole 3, form the sphere installation cavity that matches with spherical head 21 between the staple seat 1 of interstage sleeve 4 bottoms and through hole 3 tops, the spherical head 21 of ball screw 2 is installed in the sphere installation cavity, and can in the sphere installation cavity, rotate.
During assembling, the through hole 3 that first screw body 22 is passed in the staple seat 1 stretches out downwards, in the staple seat 1 of spherical head 21 gears on through hole 3, then interstage sleeve 4 is installed in the staple seat 1 of through hole 3 tops, form the sphere installation cavity that matches with spherical head 21 between the staple seat 1 of interstage sleeve 4 and through hole 3 tops, the spherical head 21 of ball screw 2 is contained in the sphere installation cavity, also can rotates in the sphere installation cavity.
Beneficial effect of the present invention: diameter less than ball screw 2 spherical head 21 is arranged in the aperture of the through hole 3 of staple seat 1 bottom, spherical head 21 just can slippage from through hole 3, therefore connection reliability and the stability between ball screw 2 and staple seat 1 and the interstage sleeve 4 improves greatly, greatly reduces the operation risk coefficient in the spinal screw implant into body.
Claims (1)
1. spinal column multi-axial screws, comprise: staple seat and ball screw, wherein ball screw is made of spherical head and screw body two parts, the bottom of staple seat is provided with through hole, be provided with interstage sleeve in the staple seat of through hole top, it is characterized in that: the diameter of through hole is less than the diameter of spherical head and can guarantee that screw body can stretch out from through hole, form the sphere installation cavity that matches with spherical head between the staple seat of interstage sleeve bottom and through hole top, the spherical head of ball screw be installed in the sphere installation cavity interior, also can in the sphere installation cavity, rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105771196A CN103040515A (en) | 2012-12-27 | 2012-12-27 | Multi-axial spinal screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105771196A CN103040515A (en) | 2012-12-27 | 2012-12-27 | Multi-axial spinal screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103040515A true CN103040515A (en) | 2013-04-17 |
Family
ID=48053531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105771196A Pending CN103040515A (en) | 2012-12-27 | 2012-12-27 | Multi-axial spinal screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103040515A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104814782A (en) * | 2015-04-30 | 2015-08-05 | 杨永军 | Middle-upper thoracic vertebrae half pedicle fixing instrument |
| CN105615975A (en) * | 2014-11-13 | 2016-06-01 | 无锡市闻泰百得医疗器械有限公司 | Posterior spinal internal fixation screw structure |
| JP2019076755A (en) * | 2013-07-08 | 2019-05-23 | アエスキュラップ アーゲー | Bone screw |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130346A (en) * | 1994-07-18 | 1996-09-04 | 卢茨·比德曼 | Anchors and their adjustment tools |
| EP1205153A2 (en) * | 2000-11-10 | 2002-05-15 | BIEDERMANN MOTECH GmbH | Bone screw |
| CN1578645A (en) * | 2001-10-31 | 2005-02-09 | U&I公司 | bone fixation device |
| CN1654026A (en) * | 2004-02-11 | 2005-08-17 | 英属维京群岛商冠亚股份有限公司 | Vertebrae repositioning device with rotary buttoned round head |
| CN1935093A (en) * | 2005-07-08 | 2007-03-28 | 比德曼莫泰赫有限公司 | Bone anchoring device |
| CN101129272A (en) * | 2006-08-24 | 2008-02-27 | 比德曼莫泰赫有限公司 | Bone anchoring device |
| EP1920722A1 (en) * | 2006-11-10 | 2008-05-14 | BIEDERMANN MOTECH GmbH | Bone anchoring nail |
| CN101198284A (en) * | 2005-04-25 | 2008-06-11 | 新特斯有限责任公司 | Bone anchor with locking cap and method of spinal fixation |
| EP1850798B1 (en) * | 2005-02-22 | 2012-11-21 | Roger P. Jackson | Polyaxial bone screw assembly |
| CN203089345U (en) * | 2012-12-27 | 2013-07-31 | 苏州欣荣博尔特医疗器械有限公司 | Spine multi-shaft screw |
-
2012
- 2012-12-27 CN CN2012105771196A patent/CN103040515A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130346A (en) * | 1994-07-18 | 1996-09-04 | 卢茨·比德曼 | Anchors and their adjustment tools |
| EP1205153A2 (en) * | 2000-11-10 | 2002-05-15 | BIEDERMANN MOTECH GmbH | Bone screw |
| CN1578645A (en) * | 2001-10-31 | 2005-02-09 | U&I公司 | bone fixation device |
| CN1654026A (en) * | 2004-02-11 | 2005-08-17 | 英属维京群岛商冠亚股份有限公司 | Vertebrae repositioning device with rotary buttoned round head |
| EP1850798B1 (en) * | 2005-02-22 | 2012-11-21 | Roger P. Jackson | Polyaxial bone screw assembly |
| CN101198284A (en) * | 2005-04-25 | 2008-06-11 | 新特斯有限责任公司 | Bone anchor with locking cap and method of spinal fixation |
| CN1935093A (en) * | 2005-07-08 | 2007-03-28 | 比德曼莫泰赫有限公司 | Bone anchoring device |
| CN101129272A (en) * | 2006-08-24 | 2008-02-27 | 比德曼莫泰赫有限公司 | Bone anchoring device |
| EP1920722A1 (en) * | 2006-11-10 | 2008-05-14 | BIEDERMANN MOTECH GmbH | Bone anchoring nail |
| CN203089345U (en) * | 2012-12-27 | 2013-07-31 | 苏州欣荣博尔特医疗器械有限公司 | Spine multi-shaft screw |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019076755A (en) * | 2013-07-08 | 2019-05-23 | アエスキュラップ アーゲー | Bone screw |
| CN105615975A (en) * | 2014-11-13 | 2016-06-01 | 无锡市闻泰百得医疗器械有限公司 | Posterior spinal internal fixation screw structure |
| CN104814782A (en) * | 2015-04-30 | 2015-08-05 | 杨永军 | Middle-upper thoracic vertebrae half pedicle fixing instrument |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130417 |