CN2095643U - Multi-hole inner fixing screw - Google Patents
Multi-hole inner fixing screw Download PDFInfo
- Publication number
- CN2095643U CN2095643U CN 90217965 CN90217965U CN2095643U CN 2095643 U CN2095643 U CN 2095643U CN 90217965 CN90217965 CN 90217965 CN 90217965 U CN90217965 U CN 90217965U CN 2095643 U CN2095643 U CN 2095643U
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- screw
- utility
- model
- hole inner
- porous area
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- Prostheses (AREA)
Abstract
The utility model provides multi-hole inner fixing screw, belonging to the orthopedic medical instruments. The utility model is mainly used for the internal fixed treatment of breakup and slip of pedicle of vertebral arch, and can be used for replacing the existing screws which are used for fixing steel plates of the pedicle of vertebral arch. The utility model is characterized in that a porous surface is sintered on the screw rod surface of the existing screw for increasing the contact areas of the screw and the bones, and the bone tissues can uniformly extend into the micropores on the porous surface to form biological interlocking structure during the restoration of the bone tissues.
Description
This utility model belongs to orthopedic medical device, is a kind of novel internal fixation screw, is mainly used in that the spinal column pedicle of vertebral arch is burst apart and the internal fixation treatment of slippage, and can replace the known screw that is used for fixing the pedicle of vertebral arch steel plate.
The full thread screw that known internal fixation screw system makes with rustless steel or with the lag screw of a smooth shaft.
Because physicochemical properties such as the corrosion resistance of stainless steel material, ultimate tensile strength, yield strength, fatigue strength are not ideal enough; Biocompatibility is relatively poor, and the screw extended immobilization in sclerotin electrolysis can take place.And the design of known screw exists the defectives such as a certain stress position of screw.Therefore, exist clinically that screw ruptures sometimes, root is moving, so that skid off, causes nonunion, screw can not phenomenon, especially late result steady in a long-term be satisfied with inadequately with being connected of sclerotin.
The purpose of this utility model improves the internal fixation curative effect of spinal column spondyloschisis and slippage and provides a kind of new treatment means for it on Therapeutic Method in the inferior above-mentioned shortcoming that overcomes known screw.
Reaching the means of the purpose that is proposed, mainly is the screw surface sintering last layer porous area at known screw, to increase the contact area of screw and sclerotin, forms interlock biology in the micropore on the porous area of evenly growing into when making bone tissue restoration.By the interlocking effect between sclerotin and screw, the long-time stability of internal fixation and pressure distribution are effectively improved.
Secondly, on the making material of screw, select forging cobalt nickel chromium triangle molybdenum titanium alloy (hereinafter to be referred as forging cobalt alloy) for use.Known experimental data shows; forge cobalt alloy oxidation and form thin, densification, oxide indissoluble, that crystal structure is arranged (being called passivating film) of one deck on its surface rapidly in body fluid; because the protection of passivating film, this alloy has very strong decay resistance.In addition, the mechanical performances such as fatigue strength of forging cobalt alloy also obviously are better than stainless steel material.
Concrete structure of the present utility model is by shown in the accompanying drawing: Fig. 1 is screw overall structure figure; Fig. 2 is band tooth pad sketch map; Fig. 3 is screw profile figure.
Multi-hole inner fixing screw comprises: nut 1, " flat recess " 2, screw rod 3, porous area 4, pulling force screw thread 5, and band tooth pad 6.
Multi-hole inner fixing screw has following advantages:
1, porous area has increased the contact area of screw and sclerotin, generates biological interlock between screw and sclerotin, both are closely organically locked together and makes pressure distribution evenly reasonable.
2, forge physicochemical properties such as cobalt alloy corrosion resistance and fatigue strength and be better than stainless steel material.
Above-mentioned advantage can solve the shortcoming that the screw that exists with known screw ruptures sometimes, root is moving, slippage causes the sclerotin disunion reliably, can improve late result effectively.
Claims (2)
1, a kind of porous area internal fixation screw is made up of nut (1), " flat recess " (2), screw rod (3), porous area (4), pulling force screw thread (5), band tooth pad (6), it is characterized in that: at the surperficial sintering last layer porous area of screw rod (3).
2, porous area internal fixation screw according to claim 1 is characterized in that: the material of making screw is a forging cobalt nickel chromium triangle molybdenum titanium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90217965 CN2095643U (en) | 1990-08-20 | 1990-08-20 | Multi-hole inner fixing screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90217965 CN2095643U (en) | 1990-08-20 | 1990-08-20 | Multi-hole inner fixing screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2095643U true CN2095643U (en) | 1992-02-12 |
Family
ID=4896860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90217965 Withdrawn CN2095643U (en) | 1990-08-20 | 1990-08-20 | Multi-hole inner fixing screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2095643U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102429716A (en) * | 2011-12-19 | 2012-05-02 | 北京爱康宜诚医疗器材股份有限公司 | Integrated-type internal set screw for vertebral column |
| CN103202726A (en) * | 2013-05-02 | 2013-07-17 | 山东威高骨科材料有限公司 | Pedicle screw |
| CN104398327A (en) * | 2014-12-18 | 2015-03-11 | 上海晟实医疗器械科技有限公司 | Locking screw provided with porous surface and used for bone connection and fixation |
| CN104887304A (en) * | 2015-05-05 | 2015-09-09 | 苏州瑞华医院有限公司 | Absorbable screw with lateral holes |
| CN109044519A (en) * | 2018-09-14 | 2018-12-21 | 北京爱康宜诚医疗器材有限公司 | pedicle screw |
| CN109124748A (en) * | 2017-06-28 | 2019-01-04 | 北京形梦信息技术有限公司 | A kind of spongious screw |
| CN109330673A (en) * | 2018-08-06 | 2019-02-15 | 苏州玄陶商务咨询有限公司 | A kind of synthetism fixing piece, Orthopedic fixation device and preparation method thereof |
-
1990
- 1990-08-20 CN CN 90217965 patent/CN2095643U/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102429716A (en) * | 2011-12-19 | 2012-05-02 | 北京爱康宜诚医疗器材股份有限公司 | Integrated-type internal set screw for vertebral column |
| EP2796104A4 (en) * | 2011-12-19 | 2015-10-14 | Beijing Akec Medical Co Ltd | Fusion type intraspinal fixing screw |
| CN103202726A (en) * | 2013-05-02 | 2013-07-17 | 山东威高骨科材料有限公司 | Pedicle screw |
| CN104398327A (en) * | 2014-12-18 | 2015-03-11 | 上海晟实医疗器械科技有限公司 | Locking screw provided with porous surface and used for bone connection and fixation |
| CN104887304A (en) * | 2015-05-05 | 2015-09-09 | 苏州瑞华医院有限公司 | Absorbable screw with lateral holes |
| CN109124748A (en) * | 2017-06-28 | 2019-01-04 | 北京形梦信息技术有限公司 | A kind of spongious screw |
| CN109330673A (en) * | 2018-08-06 | 2019-02-15 | 苏州玄陶商务咨询有限公司 | A kind of synthetism fixing piece, Orthopedic fixation device and preparation method thereof |
| CN109044519A (en) * | 2018-09-14 | 2018-12-21 | 北京爱康宜诚医疗器材有限公司 | pedicle screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |