CN104958100A - Anti-screwing jackscrew for pedicle screw - Google Patents
Anti-screwing jackscrew for pedicle screw Download PDFInfo
- Publication number
- CN104958100A CN104958100A CN201510271028.3A CN201510271028A CN104958100A CN 104958100 A CN104958100 A CN 104958100A CN 201510271028 A CN201510271028 A CN 201510271028A CN 104958100 A CN104958100 A CN 104958100A
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- China
- Prior art keywords
- jackscrew
- revolving
- rigid
- screwing jackscrew
- pedicle screw
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
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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)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses an anti-screwing jackscrew for a pedicle screw. The anti-screwing jackscrew comprises an anti-screwing jackscrew body, a plurality of rigid spines and secondary rigid multi-hole bodies are arranged below the anti-screwing jackscrew body, and the rigid spines are covered with the secondary rigid multi-hole bodies. Compared with the prior art, the anti-screwing jackscrew structure is changed, the locking force is formed depending on the solid rigid spines and the arc-shaped surface of a connecting rod, and the anti-screwing jackscrew rotates more smoothly through the secondary rigid multi-hole bodies; meanwhile, the locking force of the anti-screwing jackscrew is increased through concave plastic deformation under supporting of the rigid solid spines, the positive pressure is reduced under the condition that the equal locking effects is achieved, and the screw exploding occurrence rate of the anti-screwing jackscrew is decreased.
Description
Technical field
The present invention relates to a kind of pedicle screw to prevent revolving jackscrew, belong to medical instruments field.
Background technology
The pitman of current pedicle screw relies on the frictional force between the rigid plane of jackscrew and pitman to lock, and the quality of locking effect and the size of frictional force have direct relation, and the larger locking effect of frictional force is better.When coefficient of friction is certain, frictional force is directly proportional to normal pressure, and increasing friction force must need to increase normal pressure.Normal pressure between jackscrew and pitman is from the pressure of jackscrew external screw thread and the fastening rear generation of pedicle nail female thread.Because planar rigidity contact friction force is less than normal and wayward, very easily produce overload when screwing jackscrew and compressing pitman, thus make jackscrew, pedicle screw screw thread produce breakoff phenomenon, i.e. quick-fried silk, thus cause the inefficacy of implant.
Such as: Chinese patent 201220597000.0 disclose a kind of can the Universal vertebral pedicle screw system of fine motion, this system forms by following closely rod and being located at least two group pedicle screw assemblies followed closely on rod, each group pedicle screw assemblies comprises nail seat, pedicle screw, limited block and plug screw, wherein, the head of a nail of pedicle screw is spherical; Be provided with through hole in nail seat body, through hole top is provided with female thread, and bottom is provided with second spherical recess; Limited block is arranged in the through hole of nail seat, the lower surface of limited block is provided with first spherical nest, this first spherical nest and second described spherical recess synthesize one by spherical head of a nail sphere hole in the inner, coordinate between this sphere hole and the spherical head of a nail of pedicle screw for dynamic.
Summary of the invention
The technical problem to be solved in the present invention is to provide one and prevents revolving jackscrew, avoids very easily producing overload when screwing jackscrew and compressing pitman, thus makes jackscrew, pedicle screw screw thread produce breakoff phenomenon.
Technical scheme of the present invention is:
A kind of pedicle screw is anti-revolves jackscrew, comprises and prevents revolving jackscrew body, and described anti-revolving below jackscrew body is provided with some rigid body Spina jujubae and time rigid porous bodies, and secondary rigid porous bodies covers on rigid body Spina jujubae.
Further, rigid body Spina jujubae is evenly arranged on anti-revolving below jackscrew body.
A kind of pedicle screw, comprise screw, be arranged on the nail seat on screw top, the pitman be arranged in nail seat, be provided with in described nail seat and prevent revolving jackscrew, prevent that revolving jackscrew is threaded with nail seat, prevent revolving jackscrew and pitman close contact, the described anti-jackscrew that revolves comprises and anti-ly revolves jackscrew body, and described anti-revolving below jackscrew body is provided with some rigid body Spina jujubae and time rigid porous bodies, and secondary rigid porous bodies covers on rigid body Spina jujubae.
Further, rigid body Spina jujubae is evenly arranged on anti-revolving below jackscrew body.
Compared with prior art, the present invention prevents revolving jackscrew structure by changing, entity Spina jujubae and pitman camber surface is relied on to form sealed power, and secondary rigid porous bodies make anti-revolve jackscrew turn more smooth-going while its rigid body Spina jujubae support under matrix plastic deformation further increase the sealed power of jackscrew, reducing normal pressure when reaching equal locking effect, reducing and preventing revolving the quick-fried silk incidence rate of jackscrew.
Accompanying drawing explanation
Fig. 1 is the structural representation of pedicle screw of the present invention.
Fig. 2 is the structural representation that the present invention prevents revolving jackscrew.
Reference numeral: nail seat 1, pitman 2, anti-revolve jackscrew 3, rigid body Spina jujubae 4, secondary rigid porous bodies 5.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, present invention is described.
As shown in Figure 1, a kind of pedicle screw, comprises screw, is arranged on the nail seat 1 on screw top, the pitman 2 be arranged in nail seat 1, is provided with anti-ly to revolve jackscrew 3 in described nail seat 1, prevent that revolving jackscrew is threaded with nail seat 1, prevent revolving jackscrew 3 and pitman 2 close contact.
As shown in Figure 2, the described anti-jackscrew 3 that revolves comprises and anti-ly revolves jackscrew body, and described anti-revolving below jackscrew body is provided with some rigid body Spina jujubae 4 and time rigid porous bodies 5, and secondary rigid porous bodies 5 covers on rigid body Spina jujubae 4.
Of the present invention anti-revolve jackscrew 3 and pitman 2 contact side for the rigid body Spina jujubae 4 that covers by secondary rigid porous bodies 5, thus anti-revolving is made into rigid body Spina jujubae 4 with the contact of pitman 2 bottom jackscrew and contacted with pitman 2, rely on rigid body Spina jujubae 4 and pitman 2 curved surfaces to form sealed power, namely do not need very large normal pressure can complete good fixing.
The present invention prevents revolving jackscrew 3 structure by changing, rigid body Spina jujubae 4 is relied on to form sealed power with pitman 2 camber surface, and secondary rigid porous bodies 5 make anti-revolve jackscrew 3 turn more smooth-going while its rigid body Spina jujubae 4 support lower matrix plastic deformation and further increase and prevent revolving the sealed power of jackscrew 3, reducing normal pressure when reaching equal locking effect, reducing and preventing revolving jackscrew 3 quick-fried incidence rates.
The foregoing is only the specific embodiment of the present invention; can not be interpreted as limiting scope of the present invention with this, the equivalent distortion made in all scopes claimed at claims of the present invention and the embodiment of change are all in the present invention's scope required for protection.
Claims (4)
1. a pedicle screw revolves jackscrew with anti-, comprise and prevent revolving jackscrew body, it is characterized in that, described anti-revolving below jackscrew body is provided with some rigidity Spina jujubae (4) and time rigid porous bodies (5), and secondary rigid porous bodies (5) covers on rigidity Spina jujubae (4).
2. a kind of pedicle screw according to claim 1 revolves jackscrew with anti-, it is characterized in that, described rigidity Spina jujubae (4) is evenly arranged on anti-revolving below jackscrew body.
3. a pedicle screw, comprise screw, be arranged on the nail seat (1) on screw top, be arranged on the pitman (2) in nail seat (1), be provided with in described nail seat (1) and prevent revolving jackscrew (3), prevent that revolving jackscrew (3) is threaded with nail seat (1), prevent revolving jackscrew (3) and pitman (2) close contact, it is characterized in that, the described anti-jackscrew (3) that revolves comprises and anti-ly revolves jackscrew body, described anti-revolving below jackscrew body is provided with some rigidity Spina jujubae (4) and time rigid porous bodies (5), secondary rigid porous bodies (5) covers on rigidity Spina jujubae (4).
4. a kind of pedicle screw according to claim 3, is characterized in that, described rigidity Spina jujubae (4) is evenly arranged on anti-revolving below jackscrew body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510271028.3A CN104958100A (en) | 2015-05-25 | 2015-05-25 | Anti-screwing jackscrew for pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510271028.3A CN104958100A (en) | 2015-05-25 | 2015-05-25 | Anti-screwing jackscrew for pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104958100A true CN104958100A (en) | 2015-10-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510271028.3A Pending CN104958100A (en) | 2015-05-25 | 2015-05-25 | Anti-screwing jackscrew for pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104958100A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0348272A1 (en) * | 1988-06-24 | 1989-12-27 | Societe De Fabrication De Materiel Orthopedique | Implant for a spiral osteosynthesis device, especially in traumatology |
| WO1997014366A1 (en) * | 1995-10-18 | 1997-04-24 | Cross Medical Products, Inc. | Self-limiting set screw for use with spinal implant systems |
| WO2003024343A1 (en) * | 2001-09-03 | 2003-03-27 | Stryker Spine | Spinal osteosynthesis system comprising a support pad |
| CN101129272A (en) * | 2006-08-24 | 2008-02-27 | 比德曼莫泰赫有限公司 | Bone anchoring device |
| CN101143108A (en) * | 2006-09-15 | 2008-03-19 | 比德曼莫泰赫有限公司 | Bone anchoring device |
| 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 |
| CN101442947A (en) * | 2006-05-01 | 2009-05-27 | 华沙整形外科股份有限公司 | Locking device and method, for use in a bone stabilization system, employing a set screw member and deformable saddle member |
| CN101952341A (en) * | 2008-02-01 | 2011-01-19 | 辛西斯有限责任公司 | Porous biocompatible polymer material and methods |
| CN202821566U (en) * | 2012-07-06 | 2013-03-27 | 常州市康辉医疗器械有限公司 | Novel universal vertebral pedicle screw |
| CN203074843U (en) * | 2012-11-14 | 2013-07-24 | 天津市威曼生物材料有限公司 | Anti-wire-retreating pedicle screw |
| CN103917181A (en) * | 2009-06-15 | 2014-07-09 | 罗杰.P.杰克逊 | Polyaxial Bone Anchor Including Sleeve Stem and Friction Fit Retainer with Low Profile Edge Lock |
| CN204734535U (en) * | 2015-05-25 | 2015-11-04 | 创生医疗器械（中国）有限公司 | Pedicle of vertebral arch screw is with preventing jackscrew soon |
-
2015
- 2015-05-25 CN CN201510271028.3A patent/CN104958100A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0348272A1 (en) * | 1988-06-24 | 1989-12-27 | Societe De Fabrication De Materiel Orthopedique | Implant for a spiral osteosynthesis device, especially in traumatology |
| WO1997014366A1 (en) * | 1995-10-18 | 1997-04-24 | Cross Medical Products, Inc. | Self-limiting set screw for use with spinal implant systems |
| WO2003024343A1 (en) * | 2001-09-03 | 2003-03-27 | Stryker Spine | Spinal osteosynthesis system comprising a support pad |
| 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 |
| CN101442947A (en) * | 2006-05-01 | 2009-05-27 | 华沙整形外科股份有限公司 | Locking device and method, for use in a bone stabilization system, employing a set screw member and deformable saddle member |
| CN101129272A (en) * | 2006-08-24 | 2008-02-27 | 比德曼莫泰赫有限公司 | Bone anchoring device |
| CN101143108A (en) * | 2006-09-15 | 2008-03-19 | 比德曼莫泰赫有限公司 | Bone anchoring device |
| CN101952341A (en) * | 2008-02-01 | 2011-01-19 | 辛西斯有限责任公司 | Porous biocompatible polymer material and methods |
| CN103917181A (en) * | 2009-06-15 | 2014-07-09 | 罗杰.P.杰克逊 | Polyaxial Bone Anchor Including Sleeve Stem and Friction Fit Retainer with Low Profile Edge Lock |
| CN202821566U (en) * | 2012-07-06 | 2013-03-27 | 常州市康辉医疗器械有限公司 | Novel universal vertebral pedicle screw |
| CN203074843U (en) * | 2012-11-14 | 2013-07-24 | 天津市威曼生物材料有限公司 | Anti-wire-retreating pedicle screw |
| CN204734535U (en) * | 2015-05-25 | 2015-11-04 | 创生医疗器械（中国）有限公司 | Pedicle of vertebral arch screw is with preventing jackscrew soon |
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| 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151007 |