CN201046155Y - Mixed internal fixation system for microthorax thorax pediculus arcus vertebralis screw stick - Google Patents
Mixed internal fixation system for microthorax thorax pediculus arcus vertebralis screw stick Download PDFInfo
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- CN201046155Y CN201046155Y CNU2007200662036U CN200720066203U CN201046155Y CN 201046155 Y CN201046155 Y CN 201046155Y CN U2007200662036 U CNU2007200662036 U CN U2007200662036U CN 200720066203 U CN200720066203 U CN 200720066203U CN 201046155 Y CN201046155 Y CN 201046155Y
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- screw
- diameter
- pedicle screw
- lateral mass
- internal fixation
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Abstract
The utility model discloses a vertebral pedicle screw-rod mix internal fixation system of cervicothoracic junction, comprising a thoracic pedicle screw, a cervical lateral mass screw and a fixed rod, which is characterized in that: both the length and the diameter of the cervical lateral mass screw are less than that of the thoracic pedicle screw, the diameter of one end of the fixed rod is less than that of the other end; the end with less diameter of the fixed rod is fixedly connected with the tail of the cervical lateral mass screw; the larger end of the fixed bar diameter is fixedly connected with the thoracic pedicle screw. A smooth transition interval is arranged between the unequal diameters of the fixed rod that can prevent stress concentration and reduce the fracture rate. The utility model adopts unequal size and fixed mechanism to perfectly adapt to the spinal anatomic structure and physiological characteristics of the cervicothoracic junction, enables the posterior fusion of the cervicothoracic junction to achieve more effective stabilization, and creates better condition for postoperative boning fusion, and improves safety and convenience of operation simultaneously.
Description
Technical field
This utility model relates to medical instruments field, particularly neck breast section posterior approach internal fixation system.
Background technology
The pedicle screw rod internal fixation system that neck breast section way of escape postoperative uses, be applied at present clinical have a variety of, but all lack pedicle screw bar system at the special anatomical features design of neck breast section, this system will bring a lot of inconvenience for the operation fitting operation, the more important thing is the biomechanical characterization that does not meet neck breast section, cause internal fixation loosening, the fracture probability increases.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of can adapt to section anatomy of spine of neck breast and biomechanical characterization, easy for installation, firmly reach the low pedicle screw rod internal fixation system of the loosening incidence rate of the disconnected rod of broken nail.
In order to solve the problems of the technologies described above, this utility model adopts following technical scheme: a kind of neck breast section pedicle screw rod mixes internal fixation system, comprise thoracic pedicle screw, cervical lateral mass screw and hold-down bars, the length of cervical lateral mass screw and diameter are all less than thoracic pedicle screw, and the diameter of described hold-down bars one end is less than the diameter of the other end; The less end of described hold-down bars diameter is fixedlyed connected with the afterbody of cervical lateral mass screw, and the end that the hold-down bars diameter is bigger is fixedlyed connected with thoracic pedicle screw.
Be mild changeover portion between described hold-down bars is not isometrical.
Design concept of the present utility model is that the nail tail titanium rod groove diameter of neck breast section mesothorax end pedicle screw is big than cervical lateral mass screw nail tail titanium rod groove, and this sections fixed bar is not for isometrical, and the breast end is thick than the neck end.Thereby realize that the operation fitting operation is convenient, relatively meet the biomechanical characterization of neck breast section, it is loosening to reduce internal fixation, the fracture incidence rate.
Based on above design, this utility model adopts following technical scheme: a kind of neck breast section pedicle screw and lateral mass screw rod mix inner fixing device, but the distolateral screw of pedicle screw, neck and the not isometrical fixed bar that comprise the breast end, a kind of preferred version as technique scheme: described breast end pedicle screw, the nail tail is movable or be not dynamically connected with the nail bar, nail tail fixed bar groove is big than distolateral screw fixed bar of neck groove, breast end pedicle screw nail bar is long thick than the neck end, relatively is fit to the dissection and the physiological feature of neck thoracic vertebra transition stage.Described hold-down bars is for isometrical, and the neck end carefully relatively is fit to neck breast section pedicle nail difference characteristic than the breast end, and hold-down bars has between mild transition region between not isometrical, can prevent stress concentration, reduces the fracture incidence rate.
This utility model adopts not equidimension fixed mechanism, the anatomy of spine structure and the physiological feature that adapt to neck breast section preferably, make the way of escape fusion of neck breast section reach more effectively and can stablize, create better condition, improve the safety convenience of operating in the art simultaneously for the fusion of postoperative bone.
Description of drawings
Fig. 1 is the overall structure figure that a kind of neck breast section pedicle screw rod of the present utility model mixes internal fixation system.
Fig. 2 is the three-dimensional structure diagram that a kind of neck breast section pedicle screw rod of the present utility model mixes internal fixation system.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
Fig. 1, neck breast section pedicle screw and lateral mass screw rod shown in Figure 2 mix inner fixing device, comprise thoracic pedicle screw 1, cervical lateral mass screw 2 and not isometrical hold-down bars 3.The length of cervical lateral mass screw 2 and diameter are all less than thoracic pedicle screw 1, and the diameter of hold-down bars 3 one ends is less than the diameter of the other end; The less end of hold-down bars 3 diameters is fixedlyed connected by nail tail fastening system with cervical lateral mass screw 2, and the end that hold-down bars 3 diameters are bigger is fixedlyed connected by nail tail fastening system with thoracic pedicle screw 1.
Mounting means of the present utility model is as follows: thoracic pedicle screw 1 is implanted thoracic vertebra, and cervical lateral mass screw 2 is implanted cervical lateral mass, and according in the screw nail tail size pilot nail tail, nut is screwed into locked separately with not isometrical hold-down bars 3.
Its operation principle: neck thoracic vertebral pedicle anatomical structure, position difference are bigger, the fixed biomechanics of way of escape pedicle nail bar system is required also to there are differences, therefore the dimensional requirement of screw differs, equally the hold-down bars requirement of strength is differed, therefore design this cover system, can satisfy the fixed biomechanics requirement of the neck breast section way of escape, again can convenient operation technique, reduce the risk of operation.
Claims (2)
1. a neck breast section pedicle screw rod mixes internal fixation system, comprise thoracic pedicle screw, cervical lateral mass screw and hold-down bars, it is characterized in that: the length of cervical lateral mass screw and diameter are all less than thoracic pedicle screw, and the diameter of described hold-down bars one end is less than the diameter of the other end; The less end of described hold-down bars diameter is fixedlyed connected with the afterbody of cervical lateral mass screw, and the end that the hold-down bars diameter is bigger is fixedlyed connected with thoracic pedicle screw.
2. neck breast section pedicle screw rod according to claim 1 mixes internal fixation system, it is characterized in that: be mild changeover portion between described hold-down bars is not isometrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200662036U CN201046155Y (en) | 2007-01-10 | 2007-01-10 | Mixed internal fixation system for microthorax thorax pediculus arcus vertebralis screw stick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200662036U CN201046155Y (en) | 2007-01-10 | 2007-01-10 | Mixed internal fixation system for microthorax thorax pediculus arcus vertebralis screw stick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201046155Y true CN201046155Y (en) | 2008-04-16 |
Family
ID=39298729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200662036U Expired - Fee Related CN201046155Y (en) | 2007-01-10 | 2007-01-10 | Mixed internal fixation system for microthorax thorax pediculus arcus vertebralis screw stick |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201046155Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102772241A (en) * | 2011-05-11 | 2012-11-14 | 上海鼎桥生物科技有限公司 | Minimally invasive internal fixation fusion system for anterior spinal column |
| CN110101447A (en) * | 2019-05-22 | 2019-08-09 | 西安市红会医院 | A kind of special fixing device meeting cervical spine chest section anatomy and biomethanics |
-
2007
- 2007-01-10 CN CNU2007200662036U patent/CN201046155Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102772241A (en) * | 2011-05-11 | 2012-11-14 | 上海鼎桥生物科技有限公司 | Minimally invasive internal fixation fusion system for anterior spinal column |
| CN110101447A (en) * | 2019-05-22 | 2019-08-09 | 西安市红会医院 | A kind of special fixing device meeting cervical spine chest section anatomy and biomethanics |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080416 Termination date: 20100210 |