CN103040516A - Dual-locking type polyaxial spinal screw - Google Patents
Dual-locking type polyaxial spinal screw Download PDFInfo
- Publication number
- CN103040516A CN103040516A CN2012105771482A CN201210577148A CN103040516A CN 103040516 A CN103040516 A CN 103040516A CN 2012105771482 A CN2012105771482 A CN 2012105771482A CN 201210577148 A CN201210577148 A CN 201210577148A CN 103040516 A CN103040516 A CN 103040516A
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- support pin
- interstage sleeve
- nail seat
- spacer sleeve
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Abstract
The invention discloses a dual-locking type polyaxial spinal screw which is convenient for orthopedic operations to capable of improving screw resistance of the vertebrae. The dual-locking type polyaxial spinal screw comprises a U-shaped screw seat and a screw body, the U-shaped screw seat is provided with a mounting hole, a U-shaped spacer sleeve is arranged in the U-shaped screw seat, the U-shaped spacer sleeve and the U-shaped screw seat are mutually clamped and avoid relative rotation, and a spherical mounting cavity is formed between the bottom of the U-shaped spacer sleeve and the U-shaped screw seat. The head of the screw body is spherical, the screw body extends outwards from the mounting hole of the U-shaped screw seat, and the spherical head of the screw body is contained in the spherical mounting cavity and capable of rotating in the spherical mounting cavity. A spacer sleeve locking support pin is arranged at the top of the U-shaped spacer sleeve and in threaded fit connection with the U-shaped screw seat, and when the spacer sleeve locking support pin is screwed downwards, the spacer sleeve locking support pin is capable of driving the U-shaped spacer sleeve to move downwards until being tightly pressed on the spherical head of the screw body. A pressure rod support pin is in threaded connection with a support pin mounting hole which is arranged in the spacer sleeve locking support pin.
Description
Technical field
The present invention relates to medical instruments field, employed spinal screw 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 the pliability that this has reduced spinal column has limited 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: U-shaped nail seat and screw body, the bottom of U-shaped nail seat is provided with installing hole, be provided with U-shaped interstage sleeve in the U-shaped nail seat of installing hole top, the top card of U-shaped interstage sleeve is located in the draw-in groove on the U-shaped nail seat inwall, the outer wall of U-shaped interstage sleeve mutually engages with the inwall of U-shaped nail seat and does not relatively rotate, form the sphere installation cavity between the U-shaped nail seat of the bottom of U-shaped interstage sleeve and its below, the head of screw body is spherical head, stretch out the installing hole of screw body on U-shaped nail seat, its spherical head is contained in the sphere installation cavity, and can in installation cavity, rotate.In the surgical operation, spinal column multi-axial screws and spinal column fixing rod are used in conjunction with, and usually first squeeze into respectively a plurality of spinal column multi-axial screws in pathological changes spinal column both sides, run through in the U-shaped groove of the U-shaped interstage sleeve of the spinal column multi-axial screws of every side that then a spinal column fixing rod being set.In intervertebral regression fusion and deformity of spine corrective procedure, need to utilize the orthotic procedures such as the spinal column multi-axial screws struts, pressurization, and owing to the spherical head of screw body can be rotated in the sphere installation cavity, be that screw body and U-shaped nail seat can relatively rotate, strut and during the orthotic procedure such as pressurization the anti-rotational effect of vertebral body relatively 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 greatly conveniently strut and the orthotic procedure such as pressurization, improve the double-lock type spinal column multi-axial screws of the anti-swirl effect of vertebral body.
For addressing the above problem, the technical solution used in the present invention is: double-lock type spinal column multi-axial screws, comprise: U-shaped nail seat and screw body, the bottom of U-shaped nail seat is provided with installing hole, be provided with U-shaped interstage sleeve in the U-shaped nail seat of installing hole top, the outer wall of U-shaped interstage sleeve mutually engages with the inwall of U-shaped nail seat and does not relatively rotate, form the sphere installation cavity between the U-shaped nail seat of the bottom of U-shaped interstage sleeve and its below, the head of screw body is spherical head, protruding the installing hole of screw body on U-shaped nail seat, its spherical head is contained in the sphere installation cavity, and can in installation cavity, rotate, the top of U-shaped interstage sleeve is provided with interstage sleeve locking support pin, threaded engagement is connected between interstage sleeve locking support pin and the U-shaped nail seat inwall, be screwed down interstage sleeve locking support pin, interstage sleeve locking support pin can order about U-shaped interstage sleeve and move down, until U-shaped interstage sleeve is pressed on the spherical head of screw body; Be provided with the support pin installing hole of up/down perforation in the described interstage sleeve locking support pin, be provided with the pressure bar support pin in the support pin installing hole, the pressure bar support pin locks with interstage sleeve that threaded engagement is connected between the support pin.
Further, aforesaid double-lock type spinal column multi-axial screws wherein, is provided with spacing block set on the outer wall of U-shaped interstage sleeve, and described spacing block set is fastened in the limited impression on the U-shaped nail seat inwall, and described spacing block set can move up and down in limited impression.
Further, aforesaid double-lock type spinal column multi-axial screws, wherein, the bottom of described pressure bar support pin is provided with spur.
Beneficial effect of the present invention: in U-shaped nail seat, be provided with the interstage sleeve locking support pin with the pressure bar support pin, interstage sleeve locking support pin can order about when being screwed down that U-shaped interstage sleeve moves down until U-shaped interstage sleeve is pressed on the spherical head of screw body, no longer relatively rotate between screw body and the U-shaped nail seat like this, strut in the operation and the orthotic procedure such as pressurization thereby greatly facilitate, improved the anti-swirl effect of vertebral body, in addition, be screwed down the pressure bar support pin, it is pressed on the spinal column fixing rod, thereby plays the effect of locking spinal column fixing rod.
Description of drawings
Fig. 1 is the structural representation under the double-lock type spinal column multi-axial screws user mode of the present invention.
Fig. 2 is the structural representation of U-shaped nail seat among Fig. 1.
Fig. 3 is the structural representation that U-shaped nail seat is overlooked direction among Fig. 2.
Fig. 4 is the structural representation of U-shaped interstage sleeve among Fig. 1.
Fig. 5 is the syndeton schematic diagram between interstage sleeve locking support pin and the pressure bar support pin 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, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, double-lock type spinal column multi-axial screws, comprise: U-shaped nail seat 1 and screw body 2, the bottom of U-shaped nail seat 1 is provided with installing hole 4, be provided with U-shaped interstage sleeve 3 in the U-shaped nail seat 1 of installing hole 4 tops, the outer wall of U-shaped interstage sleeve 3 mutually engages with the inwall of U-shaped nail seat 1 and does not relatively rotate, form the sphere installation cavity between the U-shaped nail seat 1 of the bottom of U-shaped interstage sleeve 3 and its below, the head of screw body 2 is spherical head 21, protruding the installing hole 4 of screw body 2 on U-shaped nail seat 1, its spherical head 21 is contained in the sphere installation cavity, and can in installation cavity, rotate, the top of U-shaped interstage sleeve 3 is provided with interstage sleeve locking support pin 5, threaded engagement is connected between interstage sleeve locking support pin 5 and U-shaped nail seat 1 inwall, be screwed down interstage sleeve locking support pin 5, interstage sleeve locking support pin 5 can order about U-shaped interstage sleeve 3 and move down, make on its spherical head that is pressed on screw body 2 21, also be provided with spacing block set 31 on the outer wall of U-shaped interstage sleeve 3, described spacing block set 31 is fastened in the limited impression 11 on U-shaped nail seat 1 inwall, spacing block set 31 can move up and down in limited impression 11, spacing block set 31 and the position-limiting action that has played cooperating of limited impression 11 U-shaped interstage sleeve 3; Be provided with the support pin installing hole 51 of up/down perforation in the described interstage sleeve locking support pin 5, be provided with pressure bar support pin 6 in the support pin installing hole 51, described pressure bar support pin 6 locks with interstage sleeve that threaded engagement is connected between the support pin 5, and the bottom of pressure bar support pin 6 is provided with spur 61.
During operation, squeeze into respectively a plurality of double-lock type spinal column multi-axial screws in pathological changes spinal column both sides, then adjust respectively the orientation of the staple seat 1 on each spinal column multi-axial screws, in order to wear spinal column fixing rod 8, again spinal column fixing rod 8 is run through in the U-shaped groove in the U-shaped interstage sleeve 3 of the spinal column multi-axial screws that is installed in every side, and then be screwed down interstage sleeve locking support pin 5, interstage sleeve locking support pin 5 orders about U-shaped interstage sleeve 3 and moves down, make on its spherical head that is pressed on screw body 2 21, spherical head 21 just can not rotated in the sphere installation cavity like this, be can not relatively rotate between screw body 2 and the U-shaped nail seat 1, also be that interstage sleeve locking support pin 5 locks screw body 2 and U-shaped nail seat 1 mutually, strutting, when pressurization waits operation, no longer relatively rotate between screw body 2 and the U-shaped nail seat 1, strut in the operation and the orthotic procedure such as pressurization thereby greatly facilitate, improved the anti-swirl effect of vertebral body.Be screwed down pressure bar support pin 6 again and make the spur 61 of its bottom be pressed on spinal column fixing rod 8 surfaces, thereby played the effect that locks spinal column fixing rod 8, the locking effect that is arranged so that spinal column fixing rod of spur 61 is more desirable.
Claims (3)
1. double-lock type spinal column multi-axial screws, comprise: U-shaped nail seat and screw body, the bottom of U-shaped nail seat is provided with installing hole, be provided with U-shaped interstage sleeve in the U-shaped nail seat of installing hole top, the outer wall of U-shaped interstage sleeve mutually engages with the inwall of U-shaped nail seat and does not relatively rotate, form the sphere installation cavity between the U-shaped nail seat of the bottom of U-shaped interstage sleeve and its below, the head of screw body is spherical head, protruding the installing hole of screw body on U-shaped nail seat, its spherical head is contained in the sphere installation cavity, and can in installation cavity, rotate, it is characterized in that: the top of U-shaped interstage sleeve is provided with interstage sleeve locking support pin, threaded engagement is connected between interstage sleeve locking support pin and the U-shaped nail seat inwall, be screwed down interstage sleeve locking support pin, interstage sleeve locking support pin can order about U-shaped interstage sleeve and move down, until U-shaped interstage sleeve is pressed on the spherical head of screw body; Be provided with the support pin installing hole of up/down perforation in the described interstage sleeve locking support pin, be provided with the pressure bar support pin in the support pin installing hole, the pressure bar support pin locks with interstage sleeve that threaded engagement is connected between the support pin.
2. double-lock type spinal column multi-axial screws according to claim 1, it is characterized in that: be provided with spacing block set on the outer wall of U-shaped interstage sleeve, described spacing block set is fastened in the limited impression on the U-shaped nail seat inwall, and described spacing block set can move up and down in limited impression.
3. double-lock type spinal column multi-axial screws according to claim 1 and 2, it is characterized in that: the bottom of described pressure bar support pin is provided with spur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105771482A CN103040516A (en) | 2012-12-27 | 2012-12-27 | Dual-locking type polyaxial spinal screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105771482A CN103040516A (en) | 2012-12-27 | 2012-12-27 | Dual-locking type polyaxial spinal screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103040516A true CN103040516A (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105771482A Pending CN103040516A (en) | 2012-12-27 | 2012-12-27 | Dual-locking type polyaxial spinal screw |
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| CN (1) | CN103040516A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103405269A (en) * | 2013-07-22 | 2013-11-27 | 苏州欣荣博尔特医疗器械有限公司 | Spine screw with rotary screw seat |
| CN109965964A (en) * | 2017-12-28 | 2019-07-05 | 财团法人工业技术研究院 | Expansible orthopaedics implant |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2025295A1 (en) * | 2006-01-11 | 2009-02-18 | BIEDERMANN MOTECH GmbH | Bone anchoring assembly |
| CN101553178A (en) * | 2006-11-10 | 2009-10-07 | 华沙整形外科股份有限公司 | Keyed crown orientation for multi-axial screws |
| CN101606860A (en) * | 2008-06-19 | 2009-12-23 | 比德曼莫泰赫有限公司 | Bone anchoring assembly |
| CN102202588A (en) * | 2008-10-06 | 2011-09-28 | 华沙整形外科股份有限公司 | Surgical connectors for attaching an elongated member to a bone |
| CN102204840A (en) * | 2010-03-29 | 2011-10-05 | 比德曼莫泰赫有限责任两合公司 | Bone anchoring device |
| US20110276098A1 (en) * | 2010-05-05 | 2011-11-10 | Lutz Biedermann | Receiving part for receiving a rod for coupling the rod to a bone anchoring element, bone anchoring device, method and tool for assembling the same |
| CN203089335U (en) * | 2012-12-27 | 2013-07-31 | 苏州欣荣博尔特医疗器械有限公司 | Dual-locking type vertebral column multi-shaft screw |
-
2012
- 2012-12-27 CN CN2012105771482A patent/CN103040516A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2025295A1 (en) * | 2006-01-11 | 2009-02-18 | BIEDERMANN MOTECH GmbH | Bone anchoring assembly |
| CN101553178A (en) * | 2006-11-10 | 2009-10-07 | 华沙整形外科股份有限公司 | Keyed crown orientation for multi-axial screws |
| CN101606860A (en) * | 2008-06-19 | 2009-12-23 | 比德曼莫泰赫有限公司 | Bone anchoring assembly |
| CN102202588A (en) * | 2008-10-06 | 2011-09-28 | 华沙整形外科股份有限公司 | Surgical connectors for attaching an elongated member to a bone |
| CN102204840A (en) * | 2010-03-29 | 2011-10-05 | 比德曼莫泰赫有限责任两合公司 | Bone anchoring device |
| US20110276098A1 (en) * | 2010-05-05 | 2011-11-10 | Lutz Biedermann | Receiving part for receiving a rod for coupling the rod to a bone anchoring element, bone anchoring device, method and tool for assembling the same |
| CN203089335U (en) * | 2012-12-27 | 2013-07-31 | 苏州欣荣博尔特医疗器械有限公司 | Dual-locking type vertebral column multi-shaft screw |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103405269A (en) * | 2013-07-22 | 2013-11-27 | 苏州欣荣博尔特医疗器械有限公司 | Spine screw with rotary screw seat |
| CN109965964A (en) * | 2017-12-28 | 2019-07-05 | 财团法人工业技术研究院 | Expansible orthopaedics implant |
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Application publication date: 20130417 |