CN102525635B - Universal pedicle screw - Google Patents
Universal pedicle screw Download PDFInfo
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- CN102525635B CN102525635B CN201010584040.7A CN201010584040A CN102525635B CN 102525635 B CN102525635 B CN 102525635B CN 201010584040 A CN201010584040 A CN 201010584040A CN 102525635 B CN102525635 B CN 102525635B
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- screw
- chondritic
- head
- pressure ring
- fin
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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
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
- A61B17/7037—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Neurology (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
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- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a universal pedicle screw, which comprises a screw seat, a screw head and a press ring, wherein the screw seat is a tubular structure, two U-shaped openings are arranged on the side wall of one end of the screw seat, a protruding edge is arranged at the opening position of the other end of the screw seat, and clamping grooves are arranged on the inner wall of the screw seat. The screw head comprises a rod body and a spherical structure fixed at one end of the rod body, the spherical structure is located in the screw seat and contacted with the inner side of the protruding edge, and the outer diameter of the spherical structure is larger than the inner diameter of the protruding edge. The outer wall of one end of the press ring is provided with two symmetrical protruding blocks, the protruding blocks are arranged in the clamping grooves, the press ring is contacted with the spherical structure, the inner diameter of the press ring is larger than the outer diameter of the spherical structure, and the spherical structure is rotatably fixed between the clamping grooves and the protruding edge. In the universal pedicle screw, the protruding edge on the screw seat clamps the spherical structure of the screw head in the screw seat. Due to the fact that the screw seat does not deform elastically, the problems of an existing universal pedicle screw caused by the strength of an elastic clamp ring are solved.
Description
Technical field
The application relates to medical instruments field, particularly relates to a kind of Universal pedicle screw.
Background technology
At clinical usual employing spinal internal fixation system, spinal injury is treated, and in spinal internal fixation system, pedicle screw is set and is fixed on vertebrae, is part indispensable in spinal internal fixation system.
Whether pedicle screw common at present can rotate according to head of screw, is mainly divided into two classes: directed pedicle screw and Universal pedicle screw.Compared with directed pedicle screw, Universal pedicle screw has the advantages such as clinical manipulation is simple, usability is strong, uses more extensive.But because pedicle screw is as implant, be not suitable for adopting the means such as welding, riveted joint to realize gimbal function, so existing Universal pedicle screw adopts the structure of elastic collar to realize gimbal function.Fig. 1 is the structural representation of existing Universal pedicle screw, and Fig. 2 is the explosive view of Fig. 1, as depicted in figs. 1 and 2,1 is screw base, 2 is head of screw, and 3 is elastic collar, and 4 is packing ring, when mounted, first packing ring 4 is placed in screw base 1, then the chondritic of head of screw 2 is placed in screw base 1, and then with elastic collar 3, chondritic is fixed in screw base 1, such head of screw 2 can be just that fixing point rotates with chondritic, realizes gimbal function.
By the research to prior art; applicant finds: the chondritic of elastic collar to head of screw of employing is fixed; its head of screw pull-out strength depends on the elastic strength of elastic collar; by the impact of the elastic strength of elastic collar; after implanting; head of screw usually there will be loosening, affects the stability of spinal internal fixation system.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of Universal pedicle screw, to solve due to elastic collar intensity, and causes head of screw pull-out strength low, and then the problem causing head of screw easily to loosen, and technical scheme is as follows:
A kind of Universal pedicle screw, comprising: screw base, head of screw and pressure ring,
Wherein:
Described screw base is tubular structure, its end side wall is provided with two symmetrical U-shaped openings, other end opening part inwall is provided with fin, and described screw base inwall is provided with screens groove;
Described head of screw comprises barred body and is fixed on the chondritic of described barred body one end, and described barred body is provided with screw thread, described chondritic is positioned at described screw base, contact with the inner side of described fin, and its external diameter is greater than the internal diameter of described fin, described barred body is positioned at the outside of described screw base;
One end outer wall of described pressure ring is provided with two symmetrical projections, and described projection is arranged in described screens groove, described pressure ring contacts with described chondritic, and its internal diameter is greater than the external diameter of chondritic on described head of screw, the chondritic on described head of screw is rotatably mounted between described screens groove and fin.
Preferably, described screens groove is arranged on the inwall of the screw base between described U-shaped open top and U-shaped open bottom.
Preferably, contact with the described chondritic structure of one end of described pressure ring is arcuate structure.
Preferably, the end face that described pressure ring is provided with projection one end is also provided with two symmetrical V-type expansion grooves.
Preferably, described two V-types expand the axis of groove point-blank, and perpendicular with the line of described two projections.
Preferably, described head of screw chondritic top is provided with interior hex shaped groove.
Preferably, the section described screw base being provided with one end of fin is provided with multiple universal groove.
From above technical scheme, the Universal pedicle screw that the embodiment of the present application provides, one end of screw base is provided with fin, the barred body of head of screw penetrates screw base from the other end of screw base, chondritic on head of screw is stuck in screw base by the fin on screw base, pressure ring is arranged in the screens groove of screw base inside, and pressure ring is expanded under the effect of ambient pressure, to be fixed in screens groove and the chondritic of head of screw is fixed in screw base.In this Universal pedicle screw, when outwards pulling out head of screw, the chondritic of head of screw is stuck in screw base by the fin on screw base, because screw base elastic deformation can not occur, so the pull-out strength of head of screw is large, avoid existing Universal pedicle screw due to elastic collar intensity, and cause head of screw pull-out strength low, and then the problem causing head of screw easily to loosen.
In addition, elastic collar wants suitable requirement to elastic properties of materials, and the elastic performance of the implantation rank titanium alloys such as Ti6Al4V and Ti6Al7Nb that current implant screw adopts usually is difficult to meet the aeroelastic requirements of collar making, and adopt the good Ti-Ni alloy of elasticity to make the words of collar, because its material is not identical with the material of screw base and head of screw, but when two kinds of different materials are fixed together after as implant implantation, in the environment of human body fluid, the probability producing galvano-cautery can be there is due to material difference, affect quality and the service life of pedicle screw.And in the Universal pedicle screw that the embodiment of the present application provides, pressure ring is after expanding under the effect of ambient pressure, be fixed in the screens groove in screw base, so the material of pressure ring does not need elastic strength, the material identical with screw base and head of screw can be selected, after existing Universal pedicle screw therefore can also be avoided to implant, affect the quality of pedicle screw and the problem in service life due to galvano-cautery.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of existing Universal pedicle screw;
Fig. 2 is the explosive view of Fig. 1;
The sectional structure schematic diagram of the Universal pedicle screw that Fig. 3 provides for the embodiment of the present application;
Fig. 4 is the explosive view of Fig. 3;
The structural representation of the screw base that Fig. 5 provides for the embodiment of the present application;
The sectional structure schematic diagram of the screw base that Fig. 6 provides for the embodiment of the present application;
The structural representation of the pressure ring that Fig. 7 provides for the embodiment of the present application;
The side view of the pressure ring that Fig. 8 provides for the embodiment of the present application;
Fig. 9 is the upward view of Fig. 8;
The structural representation of pressure ring when assembling that Figure 10 provides for the embodiment of the present application.
Detailed description of the invention
Technical scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the application's protection.
The sectional structure schematic diagram of the Universal pedicle screw that Fig. 3 provides for the embodiment of the present application.Fig. 4 is the explosive view of Fig. 3.
As shown in Figure 3 and Figure 4, this Universal pedicle screw comprises: screw base 1, head of screw 2 and pressure ring 5, and it is inner that head of screw 2 one end is arranged on screw base 1, and pressure ring 5 is located at the inside of described screw base 1.
The structural representation of the screw base that Fig. 5 provides for the embodiment of the present application.The sectional structure schematic diagram of the screw base that Fig. 6 provides for the embodiment of the present application.As shown in Figure 5, screw base 1 is tubular structure, its one end open sidewall is provided with two U-shaped openings 11, and two U-shaped openings 11 with the center of tubular structure for symmetrical centre is symmetrical, the other end opening part inwall of screw base 1 is provided with fin 12, and the internal diameter of fin 12 is less than the internal diameter of screw base 1.Screens groove 13 is annular screens groove, and on the inwall of the screw base between being arranged on bottom U-shaped opening 11 top and U-shaped opening 11, optimum position is at the bottom position place of U-shaped opening 11.In the embodiment of the present application, the internal diameter of screw base 1 can uniformity, also can for reduce gradually from the one end being provided with U-shaped opening 11 to being provided with fin 12 one end diameter.In addition, as shown in Figure 5, the end face being provided with one end of fin 12 at screw base 1 can also be provided with multiple universal groove 14.In the embodiment of the present application, the number of universal groove 14 is 3, by arranging universal groove 14, can increase the deflection angle between screw base 1 and head of screw 2, and then expand universal steering range.As shown in Figure 4, the wall of the pressure ring 5 between two U-shaped openings 11 can also be provided with two symmetrical through holes 15.
As shown in Figure 4, head of screw 2 comprises barred body 20 and is fixed on the chondritic 21 of barred body 20 one end, and barred body 20 is also provided with screw thread, for stable for chondritic 21 is fixed on human vertebra.The external diameter of the chondritic 21 of head of screw 2 is greater than the internal diameter of fin 12, and chondritic 21 is positioned at screw base 1, and contacts with the inner side of fin 12.The other end of barred body 20 is positioned at the outside of screw base 1.The external diameter of chondritic 21 is also less than the internal diameter of screw base 1, and so when mounted, the other end of barred body 20 is penetrated by one end screw base 1 being provided with U-shaped opening 11, and chondritic 21 is contacted with fin 12 contact.In the embodiment of the present application, as shown in Figure 4, chondritic 21 top of head of screw 2 is also provided with interior hex-shaped recess 22, for by instrument by Universal screw nail head implant into body vertebra.
The structural representation of the pressure ring that Fig. 7 provides for the embodiment of the present application.The side view of the pressure ring that Fig. 8 provides for the embodiment of the present application.Fig. 9 is the upward view of Fig. 8.
As shown in Figure 7, Figure 8 and Figure 9, pressure ring 5 one end outer wall is provided with two symmetrical projections 51, and the external diameter of pressure ring 5 is less than the internal diameter of screw base 1, the maximum distance of two symmetrical projections is greater than the internal diameter of screw base 1 and is less than the internal diameter of screens groove 13.Projection 51 on pressure ring 5 is positioned at screens groove 13, and contact with the chondritic 21 of head of screw 2 away from one end of projection 51, chondritic 21 be rotatably mounted between screens groove 13 and fin 12, and pressure ring 5 contacts with chondritic 21, the structure of one end is arcuate structure.
In the embodiment of the present application, end face pressure ring 5 being provided with projection 51 one end is also provided with two symmetrical V-type expansion grooves 52, the axis of two V-type expansion grooves 52 point-blank, and it is perpendicular with the line of two projections 51, for after pressure ring 5 is in place, under external force, V-type is expanded one end expansion at groove 52 place, pressure ring 5 is fixed in screens groove 13.As shown in Figure 10, in figure, 6 is expansion tool, expansion tool 6 is used to carry out applying pressure F to two V-type expansion grooves 52, pressure F can be divided into two component F1 and F2, and act on two inclined-planes of V-type expansion groove 52 respectively, by one end expansion at V-type expansion groove 52 place on pressure ring 5, pressure ring 5 is fixed in screens groove 13.
Assembling process below in conjunction with this Universal pedicle screw is described further its structure.
When assembling this Universal pedicle screw, first by the barred body 20 on head of screw 2, the one end being provided with U-shaped opening 11 by screw base 1 penetrates, and the chondritic 21 on head of screw 2 is contacted with fin 12.Then two projections 51 on pressure ring 5 are stuck in two U-shaped openings 11, and pressure ring 5 is shifted onto dynamic to contact with the chondritic 21 of head of screw 2, and two projections 51 now on pressure ring 5 arrive screens groove 13, rotate pressure ring 5 again, the axis of two V-type expansion grooves 52 is paralleled with two U-shaped openings 11.Under external force, V-type is expanded one end expansion at groove 52 place, make pressure ring 5 be fixed in screens groove 13, the chondritic 21 of head of screw 2 can be realized like this to be rotatably mounted in screw base 1.
From above technical scheme, the Universal pedicle screw that the embodiment of the present application provides, one end of screw base is provided with fin, the barred body of head of screw penetrates screw base from the other end of screw base, chondritic on head of screw is stuck in screw base by the fin on screw base, pressure ring is arranged in the screens groove of screw base inside, and pressure ring is expanded under the effect of ambient pressure, to be fixed in screens groove and the chondritic of head of screw is fixed in screw base.In this Universal pedicle screw, when outwards pulling out head of screw, the chondritic of head of screw is stuck in screw base by the fin on screw base, because screw base elastic deformation can not occur, so the pull-out strength of head of screw is large, avoid existing Universal pedicle screw due to elastic collar intensity, and cause head of screw pull-out strength low, and then the problem causing head of screw easily to loosen.
In addition, elastic collar wants suitable requirement to elastic properties of materials, and the elastic performance of the implantation rank titanium alloys such as Ti6Al4V and Ti6Al7Nb that current implant screw adopts usually is difficult to meet the aeroelastic requirements of collar making, and adopt the good Ti-Ni alloy of elasticity to make the words of collar, because its material is not identical with the material of screw base and head of screw, but when two kinds of different materials are fixed together after as implant implantation, in the environment of human body fluid, the probability producing galvano-cautery can be there is due to material difference, affect quality and the service life of pedicle screw.And in the Universal pedicle screw that the embodiment of the present application provides, pressure ring is after expanding under the effect of ambient pressure, be fixed in the screens groove in screw base, so the material of pressure ring does not need elastic strength, the material identical with screw base and head of screw can be selected, after existing Universal pedicle screw therefore can be avoided to implant, affect the quality of pedicle screw and the problem in service life due to galvano-cautery.
The above is only the preferred implementation of the application, those skilled in the art is understood or realizes the application.To be apparent to one skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the application, can realize in other embodiments.Therefore, the application can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a Universal pedicle screw, is characterized in that, comprising: screw base, head of screw and pressure ring, wherein:
Described screw base is tubular structure, its end side wall is provided with two symmetrical U-shaped openings, separately
One end open place inwall is provided with fin, and described screw base inwall is provided with screens groove, institute
Stating screens groove is annular screens groove;
Described head of screw comprises barred body and is fixed on the chondritic of described barred body one end, and described barred body is provided with screw thread, described chondritic is positioned at described screw base, contact with the inner side of described fin, and its external diameter is greater than the internal diameter of described fin, described barred body is positioned at the outside of described screw base;
One end outer wall of described pressure ring is provided with two symmetrical projections, and described projection is arranged in described screens groove, the end face that described pressure ring is provided with projection one end is provided with two symmetrical V-type expansion grooves, described pressure ring contacts with described chondritic, and its internal diameter is greater than the external diameter of chondritic on described head of screw, the chondritic on described head of screw is rotatably mounted between described screens groove and fin.
2. Universal pedicle screw according to claim 1, is characterized in that, described screens groove is arranged on the inwall of the screw base between described U-shaped open top and U-shaped open bottom.
3. Universal pedicle screw according to claim 1, is characterized in that, contact with the described chondritic structure of one end of described pressure ring is arcuate structure.
4. Universal pedicle screw according to claim 1, is characterized in that, described two V-types expand the axis of groove point-blank, and perpendicular with the line of described two projections.
5. Universal pedicle screw according to claim 1, is characterized in that, described head of screw chondritic top is provided with interior hex shaped groove.
6. Universal pedicle screw according to claim 1, is characterized in that, the section described screw base being provided with one end of fin is provided with three universal grooves.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010584040.7A CN102525635B (en) | 2010-12-10 | 2010-12-10 | Universal pedicle screw |
| PCT/CN2011/078277 WO2012075827A1 (en) | 2010-12-10 | 2011-08-11 | Polyaxial pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010584040.7A CN102525635B (en) | 2010-12-10 | 2010-12-10 | Universal pedicle screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102525635A CN102525635A (en) | 2012-07-04 |
| CN102525635B true CN102525635B (en) | 2014-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010584040.7A Active CN102525635B (en) | 2010-12-10 | 2010-12-10 | Universal pedicle screw |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102525635B (en) |
| WO (1) | WO2012075827A1 (en) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7833250B2 (en) | 2004-11-10 | 2010-11-16 | Jackson Roger P | Polyaxial bone screw with helically wound capture connection |
| US8876868B2 (en) | 2002-09-06 | 2014-11-04 | Roger P. Jackson | Helical guide and advancement flange with radially loaded lip |
| US7377923B2 (en) | 2003-05-22 | 2008-05-27 | Alphatec Spine, Inc. | Variable angle spinal screw assembly |
| US8926670B2 (en) | 2003-06-18 | 2015-01-06 | Roger P. Jackson | Polyaxial bone screw assembly |
| US7776067B2 (en) | 2005-05-27 | 2010-08-17 | Jackson Roger P | Polyaxial bone screw with shank articulation pressure insert and method |
| US7766915B2 (en) | 2004-02-27 | 2010-08-03 | Jackson Roger P | Dynamic fixation assemblies with inner core and outer coil-like member |
| US8926672B2 (en) | 2004-11-10 | 2015-01-06 | Roger P. Jackson | Splay control closure for open bone anchor |
| US9168069B2 (en) | 2009-06-15 | 2015-10-27 | Roger P. Jackson | Polyaxial bone anchor with pop-on shank and winged insert with lower skirt for engaging a friction fit retainer |
| US8444681B2 (en) | 2009-06-15 | 2013-05-21 | Roger P. Jackson | Polyaxial bone anchor with pop-on shank, friction fit retainer and winged insert |
| EP2753252A1 (en) | 2009-06-15 | 2014-07-16 | Jackson, Roger P. | Polyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock |
| US11229457B2 (en) | 2009-06-15 | 2022-01-25 | Roger P. Jackson | Pivotal bone anchor assembly with insert tool deployment |
| WO2013106217A1 (en) | 2012-01-10 | 2013-07-18 | Jackson, Roger, P. | Multi-start closures for open implants |
| US8911478B2 (en) | 2012-11-21 | 2014-12-16 | Roger P. Jackson | Splay control closure for open bone anchor |
| US10058354B2 (en) | 2013-01-28 | 2018-08-28 | Roger P. Jackson | Pivotal bone anchor assembly with frictional shank head seating surfaces |
| US8852239B2 (en) | 2013-02-15 | 2014-10-07 | Roger P Jackson | Sagittal angle screw with integral shank and receiver |
| US9566092B2 (en) | 2013-10-29 | 2017-02-14 | Roger P. Jackson | Cervical bone anchor with collet retainer and outer locking sleeve |
| US9717533B2 (en) | 2013-12-12 | 2017-08-01 | Roger P. Jackson | Bone anchor closure pivot-splay control flange form guide and advancement structure |
| US9451993B2 (en) | 2014-01-09 | 2016-09-27 | Roger P. Jackson | Bi-radial pop-on cervical bone anchor |
| US9597119B2 (en) | 2014-06-04 | 2017-03-21 | Roger P. Jackson | Polyaxial bone anchor with polymer sleeve |
| US10064658B2 (en) | 2014-06-04 | 2018-09-04 | Roger P. Jackson | Polyaxial bone anchor with insert guides |
| 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 |
| CN104783885A (en) * | 2015-05-06 | 2015-07-22 | 山东威高骨科材料股份有限公司 | Lower screw assembly type universal screw |
| CN105434021B (en) * | 2015-11-27 | 2018-06-12 | 周建明 | A kind of pedicle screw |
| CN105596071B (en) * | 2015-12-31 | 2018-03-23 | 何静 | A kind of dual-purpose pedicle nail |
| CN110123431A (en) * | 2019-05-14 | 2019-08-16 | 山东新华联合骨科器材股份有限公司 | One kind is autotomyed the fixed device of screw Universal pedicle screw |
| CN112617993A (en) * | 2020-12-30 | 2021-04-09 | 北京中安泰华科技有限公司 | Rotatable wide-angle universal nail for neck posterior |
| CN113768603A (en) * | 2021-09-16 | 2021-12-10 | 右江民族医学院附属医院 | Universal pedicle screw fixing device and mounting tool thereof |
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| US5443467A (en) * | 1993-03-10 | 1995-08-22 | Biedermann Motech Gmbh | Bone screw |
| CN101389279A (en) * | 2004-06-17 | 2009-03-18 | 华沙整形外科股份有限公司 | Multi-axial bone attachment assembly |
| WO2009124196A2 (en) * | 2008-04-03 | 2009-10-08 | Life Spine, Inc. | Top loading polyaxial spine screw assembly with one step lockup |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100495876B1 (en) * | 2002-11-25 | 2005-06-16 | 유앤아이 주식회사 | bone fixation appratus and assembling method and tool |
| US8075599B2 (en) * | 2005-10-18 | 2011-12-13 | Warsaw Orthopedic, Inc. | Adjustable bone anchor assembly |
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2010
- 2010-12-10 CN CN201010584040.7A patent/CN102525635B/en active Active
-
2011
- 2011-08-11 WO PCT/CN2011/078277 patent/WO2012075827A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5443467A (en) * | 1993-03-10 | 1995-08-22 | Biedermann Motech Gmbh | Bone screw |
| CN101389279A (en) * | 2004-06-17 | 2009-03-18 | 华沙整形外科股份有限公司 | Multi-axial bone attachment assembly |
| WO2009124196A2 (en) * | 2008-04-03 | 2009-10-08 | Life Spine, Inc. | Top loading polyaxial spine screw assembly with one step lockup |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012075827A1 (en) | 2012-06-14 |
| CN102525635A (en) | 2012-07-04 |
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Effective date of registration: 20151223 Address after: 215623 people's North Road, Chang Yin Sha administrative district, Jiangsu, Zhangjiagang Patentee after: SUZHOU MINIMALLY-INVASIVE SPINE TRAUMA MEDICAL TECHNOLOGY CO., LTD. Address before: 201318 Shanghai city Pudong New Area zhouputown Tianxiong road 588 Lane No. twenty-third 1-28 Patentee before: Shanghai MicroPort Orthopedics Co., Ltd. |