CN103405269A - Spine screw with rotary screw seat - Google Patents
Spine screw with rotary screw seat Download PDFInfo
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- CN103405269A CN103405269A CN2013103067615A CN201310306761A CN103405269A CN 103405269 A CN103405269 A CN 103405269A CN 2013103067615 A CN2013103067615 A CN 2013103067615A CN 201310306761 A CN201310306761 A CN 201310306761A CN 103405269 A CN103405269 A CN 103405269A
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- nail seat
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- shaped nail
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Abstract
The invention discloses a spine screw with a rotary screw seat. The spine screw with the rotary screw seat can release a fixing rod very conveniently and greatly improve the counter-rotation effect of the vertebral body. The spine screw comprises the U-type screw seat and a screw body with threads. A round installation hole is formed in the bottom of the U-type screw seat, an U-type spacer sleeve is arranged in the U-type screw seat above the round installation hole, and the outer wall of the U-type spacer sleeve and the inner wall of the U-type screw seat are mutually clamped without relative rotation. A spherical surface installation cavity is formed between the bottom of the U-type spacer sleeve and the U-type screw seat below the U-type spacer sleeve. The head of the screw body is a spherical head matched with the spherical surface installation cavity. The screw body extends out of the round installation hole in the U-type screw seat, the spherical head is completely contained in the spherical surface installation cavity, a section of cylinder is arranged at the bottom of the spherical head on the screw body, and the cylinder is clamped in the round installation hole of the U-type screw seat. The round installation hole of the U-type screw seat is attached to the outer wall of the cylinder, and the U-type screw seat can rotate along the outer wall of the cylinder.
Description
Technical field
The present invention relates to medical instruments field, the spinal screw used while 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 all can cause the pathological condition of spinal column, and these pathological symptoms can reduce the pliability of spinal column and limit the range of movement of spinal column.Adopting the surgery internal fixation operation to treat above-mentioned pathological condition is the Therapeutic Method of medically commonly using at present.Spinal screw is many to be used in the internal fixation operation of the spinal column De Qian road such as thoracic vertebra, lumbar vertebra, waist sacrum, ilium and the way of escape.Traditional spinal screw comprises two kinds: a kind of is the spinal column hold-down screw, another kind is the spinal column multi-axial screws, two kinds of spinal screws all are comprised of U-shaped nail seat and threaded screw body two parts, wherein, U-shaped nail seat can be divided into again highly less common U-shaped nail seat and the highly higher U-shaped nail seat that resets.Between the U-shaped nail seat of spinal column hold-down screw and screw body, interfix, can not relatively rotate between U-shaped nail seat and screw body, the bottom of the U-shaped nail seat of spinal column multi-axial screws is provided with the circular mounting hole, in the U-shaped nail seat of top, circular mounting hole, be provided with U-shaped interstage sleeve, the top card of U-shaped interstage sleeve is located in the draw-in groove on U-shaped nail seat inwall, the outer wall of U-shaped interstage sleeve mutually engages and does not relatively rotate with the inwall of U-shaped nail seat, between the U-shaped nail seat of the bottom of U-shaped interstage sleeve and its below, form the sphere installation cavity, the spherical head of the head of screw body for matching with the sphere installation cavity, screw body is from stretching out the circular mounting hole on U-shaped nail seat, its spherical head is contained in the sphere installation cavity, and the bottom sphere of spherical head protrudes the circular mounting hole, thereby making screw body can in the sphere installation cavity, do multiaxis rotates.In surgical operation, spinal screw and spinal column fixing rod are used in conjunction with, and usually first in pathological changes spinal column both sides, squeeze into respectively a plurality of spinal screws, then in the U-shaped groove of the U-shaped nail seat of the spinal screw of every side, run through and are fixedly installed a spinal column fixing rod.In intervertebral regression fusion and deformity of spine corrective procedure, need to utilize the orthotic procedures such as spinal screw struts, pressurization.There is following shortcoming in the spinal column hold-down screw in the use procedure of above-mentioned orthomorphia: because of individual variation and squeeze into the reasons such as error and make the position of the spinal column hold-down screw of squeezing into human body produce unavoidably little deviation, and screw body and U-shaped nail seat interfix, therefore can't finely tune U-shaped nail seat position, thereby bring great inconvenience for the clubs of putting of spinal column fixing rod; There is following shortcoming in the spinal column multi-axial screws in the use procedure of above-mentioned orthomorphia: the spherical head of screw body can be rotated in the sphere installation cavity, be that screw body and U-shaped nail seat can be done the multiaxis rotation, strut and during the orthotic procedure such as pressurization the anti-rotational effect of vertebral body poor, strengthen operating difficulty, thereby may cause final orthopedic effect undesirable.
Summary of the invention
The technical issues that need to address of the present invention are: provide a kind of and can in spine corrective operation, greatly conveniently put the spinal screw that the band rotation nail seat of the anti-swirl effect of vertebral body was made, also can greatly be improved in clubs.
For addressing the above problem, the technical solution used in the present invention is: band rotates the spinal screw of nail seat, comprise: U-shaped nail seat and threaded screw body, the bottom of U-shaped nail seat is provided with the circular mounting hole, in the U-shaped nail seat of top, circular mounting hole, be provided with U-shaped interstage sleeve, the outer wall of U-shaped interstage sleeve mutually engages and does not relatively rotate with the inwall of U-shaped nail seat, between the U-shaped nail seat of the bottom of U-shaped interstage sleeve and its below, form the sphere installation cavity, the spherical head of the head of screw body for matching with the sphere installation cavity, screw body is from protruding the circular mounting hole on U-shaped nail seat, spherical head all is contained in the sphere installation cavity, and does not protrude outside the circular mounting hole bottom of spherical head, on screw body, the bottom of spherical head is provided with one section cylinder, cylinder is installed in the circular mounting hole of U-shaped nail seat, circular mounting hole and the cylindrical outer wall of U-shaped nail seat fit, and U-shaped nail seat can be rotated along cylindrical outer wall.
Further, aforesaid spinal screw with the activity nail seat, wherein, the screw thread on screw body is double thread.
Beneficial effect of the present invention: position and the spinal column fixing rod of by the mode of rotating U-shaped nail seat, adjusting the U-shaped groove of U-shaped nail seat adapt, thereby the clubs of putting that greatly facilitates spinal column fixing rod is done; Due to the spherical head of screw body, can not in the sphere installation cavity of U-shaped nail seat, do multiaxis and rotate in addition, therefore strut and during the orthotic procedure such as pressurization the anti-rotate effect of vertebral body greatly improve, thereby reduced operation risk.
The accompanying drawing explanation
Fig. 1 is the structural representation that the band described in embodiment 1 rotates the spinal screw of nail seat.
Fig. 2 is the structural representation that the band described in embodiment 2 rotates the spinal screw of nail seat.
The specific embodiment
Below in conjunction with accompanying drawing and optimum embodiment, the present invention is described in further detail.
Embodiment 1: as shown in Figure 1, band rotates the spinal screw of nail seat, comprise: common U-shaped nail seat 1 and threaded screw body 2, the bottom of common U-shaped nail seat 1 is provided with circular mounting hole 3, in the common U-shaped nail seat 1 of 3 tops, circular mounting hole, be provided with U-shaped interstage sleeve 4, the outer wall of U-shaped interstage sleeve 4 mutually engages and does not relatively rotate with the inwall of common U-shaped nail seat 1, between the common U-shaped nail seat 1 of the bottom of U-shaped interstage sleeve 4 and its below, form the sphere installation cavity, the spherical head 21 of the head of screw body 2 for matching with the sphere installation cavity, screw body 2 is from protruding the circular mounting hole 3 on common U-shaped nail seat 1, spherical head 21 all is contained in the sphere installation cavity, on screw body 2, the bottom of spherical head 21 is provided with one section cylinder 22, cylinder 22 is installed in the circular mounting hole 3 of common U-shaped nail seat 1, make the bottom of spherical head 21 can not protrude from outside circular mounting hole 3, the circular mounting hole 3 of common U-shaped nail seat 1 fits with the outer wall of cylinder 22, and common U-shaped nail seat 1 can be rotated along the outer wall of cylinder 22.In the present embodiment, the screw thread on screw body 2 is double thread.Adopt the purpose of double thread to be: add the helical pitch of major thread, that can greatly improve like this spinal screw advances nail speed, thereby effectively reduces the probability that operative hemorrhage infects and other complication occurs.When carrying out intervertebral regression fusion and deformity of spine corrective procedure, can suitably rotate common U-shaped nail seat 1, position and the spinal column fixing rod of the U-shaped groove 11 on common U-shaped nail seat 1 are adapted, thereby the clubs of putting that greatly facilitates spinal column fixing rod is done; Due to the spherical head 21 of screw body 2, can not in the sphere installation cavity of U-shaped nail seat 1, do multiaxis and rotate in addition, therefore strut and during the orthotic procedure such as pressurization the anti-rotational effect of vertebral body greatly improve, thereby reduced risk for operation.
Embodiment 2: as shown in Figure 2, band rotates the spinal screw of nail seat, comprise: U-shaped nail seat 1 and threaded screw body 2 reset, the bottom of the U-shaped nail seat 1 that resets is provided with circular mounting hole 3, in the U-shaped nail seat 1 that resets of 3 tops, circular mounting hole, be provided with U-shaped interstage sleeve 4, the outer wall of U-shaped interstage sleeve 4 mutually engages and does not relatively rotate with the inwall of the U-shaped nail seat 1 that resets, resetting between U-shaped nail seat 1 of the bottom of U-shaped interstage sleeve 4 and its below forms the sphere installation cavity, the spherical head 21 of the head of screw body 2 for matching with the sphere installation cavity, screw body 2 is from protruding the circular mounting hole 3 on the U-shaped nail seat 1 that resets, spherical head 21 all is contained in the sphere installation cavity, on screw body 2, the bottom of spherical head 21 is provided with one section cylinder 22, cylinder 22 is installed in the circular mounting hole 3 of the U-shaped nail seat 1 that resets, make the bottom of spherical head 21 can not protrude from outside circular mounting hole 3, the circular mounting hole 3 of the U-shaped nail seat 1 that resets fits with the outer wall of cylinder 22, and the U-shaped nail seat 1 that resets can be rotated along the outer wall of cylinder 22.In the present embodiment, the screw thread on screw body 2 is double thread.Adopt the purpose of double thread to be: add the helical pitch of major thread, that can greatly improve like this spinal screw advances nail speed, thereby effectively reduces the probability that operative hemorrhage infects and other complication occurs.When carrying out intervertebral regression fusion and deformity of spine corrective procedure, can suitably rotate the U-shaped nail seat 1 that resets, the position of the U-shaped groove 11 on the U-shaped nail seat 1 that makes to reset and spinal column fixing rod be to adaptation, thus the clubs of putting that greatly facilitates spinal column fixing rod is done; Due to the spherical head 21 of screw body 2, can not in the sphere installation cavity of U-shaped nail seat 1 that resets, do multiaxis and rotate in addition, therefore strut and during the orthotic procedure such as pressurization the anti-rotational effect of vertebral body greatly improve, thereby reduced risk for operation.
Claims (2)
1. band rotates the spinal screw of nail seat, comprise: U-shaped nail seat and threaded screw body, the bottom of U-shaped nail seat is provided with the circular mounting hole, in the U-shaped nail seat of top, circular mounting hole, be provided with U-shaped interstage sleeve, the outer wall of U-shaped interstage sleeve mutually engages and does not relatively rotate with the inwall of U-shaped nail seat, between the U-shaped nail seat of the bottom of U-shaped interstage sleeve and its below, form the sphere installation cavity, the spherical head of the head of screw body for matching with the sphere installation cavity, screw body is from protruding the circular mounting hole on U-shaped nail seat, it is characterized in that: spherical head all is contained in the sphere installation cavity, and does not protrude outside the circular mounting hole bottom of spherical head, on screw body, the bottom of spherical head is provided with one section cylinder, cylinder is installed in the circular mounting hole of U-shaped nail seat, circular mounting hole and the cylindrical outer wall of U-shaped nail seat fit, and U-shaped nail seat can be rotated along cylindrical outer wall.
2. band according to claim 1 rotates the spinal screw of nail seat, and it is characterized in that: the screw thread on screw body is double thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103067615A CN103405269A (en) | 2013-07-22 | 2013-07-22 | Spine screw with rotary screw seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103067615A CN103405269A (en) | 2013-07-22 | 2013-07-22 | Spine screw with rotary screw seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103405269A true CN103405269A (en) | 2013-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103067615A Pending CN103405269A (en) | 2013-07-22 | 2013-07-22 | Spine screw with rotary screw seat |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102458279A (en) * | 2009-06-17 | 2012-05-16 | 斯恩蒂斯有限公司 | Revision connector for spinal constructs |
| CN202365899U (en) * | 2011-11-08 | 2012-08-08 | 常州市康辉医疗器械有限公司 | One-way pedicle screw with rotatable type nail cap |
| CN103040516A (en) * | 2012-12-27 | 2013-04-17 | 苏州欣荣博尔特医疗器械有限公司 | Dual-locking type polyaxial spinal screw |
| CN103040517A (en) * | 2012-12-27 | 2013-04-17 | 苏州欣荣博尔特医疗器械有限公司 | Simple-pendulum spinal screw |
| CN202982202U (en) * | 2013-01-05 | 2013-06-12 | 山东威高骨科材料有限公司 | Single-rotation pedicle screw |
| CN203417257U (en) * | 2013-07-22 | 2014-02-05 | 苏州欣荣博尔特医疗器械有限公司 | Spinal screw with rotating screw seat |
-
2013
- 2013-07-22 CN CN2013103067615A patent/CN103405269A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102458279A (en) * | 2009-06-17 | 2012-05-16 | 斯恩蒂斯有限公司 | Revision connector for spinal constructs |
| CN202365899U (en) * | 2011-11-08 | 2012-08-08 | 常州市康辉医疗器械有限公司 | One-way pedicle screw with rotatable type nail cap |
| CN103040516A (en) * | 2012-12-27 | 2013-04-17 | 苏州欣荣博尔特医疗器械有限公司 | Dual-locking type polyaxial spinal screw |
| CN103040517A (en) * | 2012-12-27 | 2013-04-17 | 苏州欣荣博尔特医疗器械有限公司 | Simple-pendulum spinal screw |
| CN202982202U (en) * | 2013-01-05 | 2013-06-12 | 山东威高骨科材料有限公司 | Single-rotation pedicle screw |
| CN203417257U (en) * | 2013-07-22 | 2014-02-05 | 苏州欣荣博尔特医疗器械有限公司 | Spinal screw with rotating screw seat |
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Application publication date: 20131127 |