CN1132556C - Anti-rotation internal fixator for setting of bone fracture - Google Patents
Anti-rotation internal fixator for setting of bone fracture Download PDFInfo
- Publication number
- CN1132556C CN1132556C CN 99115100 CN99115100A CN1132556C CN 1132556 C CN1132556 C CN 1132556C CN 99115100 CN99115100 CN 99115100 CN 99115100 A CN99115100 A CN 99115100A CN 1132556 C CN1132556 C CN 1132556C
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- Prior art keywords
- screw rod
- connecting screw
- plagiocephaly
- tapping screw
- nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 208000010392 Bone Fractures Diseases 0.000 title claims abstract description 14
- 238000010079 rubber tapping Methods 0.000 claims abstract description 28
- 208000009782 Plagiocephaly Diseases 0.000 claims description 22
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract description 2
- 210000000115 thoracic cavity Anatomy 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000399 orthopedic effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 206010010214 Compression fracture Diseases 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000004491 foramen ovale Anatomy 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 206010041569 spinal fracture Diseases 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The present invention relates to an internal fixer for anti-rotary bone fracture reposition, which is composed of a connecting screw rod (1), a straight head self-tapping screw (2), an oblique head self-tapping screw (3) and a nut (5). The present invention is characterized in that the connecting screw rod (1) is a whole rod, wherein one end of the connecting screw rod (1) is hexagonal, and the other end is an oblique head. The straight head self-tapping screw (2) is inserted into in an oblique head hole (6) of the connecting screw rod (1) and is fixed by the nut (5). The oblique head self-tapping screw (3) is provided with a hexagonal hole sheathed on one hexagonal end of the connecting screw rod. A standaway sleeve barrel (4) is arranged between the two screws and is matched with the connecting screw rod by screw threads. The internal fixer has a firm structure. Compared with other internal fixers, the present invention is stronger in axial compression resistance, side bending resistance and rotation resistance. In addition, the present invention has the good reposition effect. After the present invention is applied to the clinical operation, the operation time can be saved by more than half an hour and the present invention can be applied to the bone fracture or the dislocation of vertebral bodies of single or two thoracic vertebra and lumbar vertebra.
Description
Technical field: the present invention relates to a kind of medical implant, be specifically related to a kind of anti-rotation internal fixator for setting of bone fracture.
The background technology lumbar vertebra compression fracture is used the pedicle inner fixer of short segment and is fixed, and has been advantages such as numerous orthopedists accept to become fashion, and it has, and wound is less, fixed-segment is short.But observe clinically occur resetting after the part patient operation complete, reset lose, situations such as broken nail, disconnected bar, Yang Huilin had once reported the complication situation after 504 routine pedicles are fixed, wherein follow closely the loosening rate of bar and account for 4.8%, the broken nail rate accounts for 10.6% (Chinese journal of orthopedics, 1996,16:356-359).Hiromi etc. (Spine, 1990,15:1159-1165.) report broken nail rate is 5.7%.The factor of factor, the operating technology of the existing apparatus of these complication itself occurs, also the factor of biomechanics arranged.Therefore, after the Dick nail was used, in recent years, people had also developed (Chinese surgical magazine, 1992,30:722-725 such as Steffee steel plate, RF, AF, APF and annular knurl nail in succession; China's surgical magazine, 1995,30:219-221; Chinese journal of orthopedics, 1997,17 488-489; Chinese journal of orthopedics, 1995,15 570572.But all there is defective in various degree in these products, as Dick nail and RF complex structure, and operation inconvenience, the angle after analyzing it and resetting and highly losing owing to bad the causing of power nuclear structure on the Y-axis.AF has simple in structure but do not have anti-rotational device on the Z axle.The shear stress maximum at Steffee steel plate pedicle screw and steel plate place, and art light plate cover nail is difficult for grasping.Shen Shi pedicle fixture is fixing uncertain at Z axle counter rotation device, only has the upper end to fix through three posts simultaneously in the two ends, the unbalanced stress weighing apparatus.The annular knurl nail of Ge Baofeng can increase the weight of or occur the damage of center pillar in reseting procedure, the back fixation that resets lost efficacy when buckling stress is big easily.
Summary of the invention: the objective of the invention is to design and a kind ofly can overcome prior art defective, firm, easy to operate anti-rotation internal fixator for setting of bone fracture simple in structure.
Above-mentioned purpose of the present invention realizes by following proposal.
A kind of anti-rotation internal fixator for setting of bone fracture, by connecting screw rod 1, straight peen tapping screw 2, plagiocephaly tapping screw 3, nut 5 is formed, connecting screw rod 1 is a whole bar, and the one end is a hexagon, and the other end is a plagiocephaly, straight peen tapping screw 2 inserts in the plagiocephaly hole 6 of connecting screw rod 1, and fixing with nut 5, plagiocephaly tapping screw 3 has hex hole and is enclosed within the hexagonal end of connecting screw rod, has one to strut sleeve 4 and connecting screw rod employing threaded engagement between two screws.
In the such scheme, described plagiocephaly hole 6 is the oval hole, and the oval hole length is 1.5-2 a times of straight peen tapping screw diameter.
In the such scheme, described nut 5 is the hemispherical nut, and the radius of hemispherical nut is identical with the concave size of the plagiocephaly of connecting screw rod 1, and driving fit so well prevents to become flexible.
In the such scheme, the two plagiocephaly angle of inclination of connecting screw rod 1 and plagiocephaly tapping screw 3 is identical, and its preferred angle scope is 0-10 °.
The biomechanics comparative study of anti-rotation internal fixator for setting of bone fracture and other four kinds of Dick nails, Steffee, AF, RF pedicle inner fixer shows, this inner fixer structure is strong, anti-axial compression, resistance to lateral bending, anti-rotation are all strong than other inner fixer, better reduction.Estimate to be applied to save operating time more than half an hour after clinical, have good social benefit and economic benefit.
The present invention is applied to single or two breast fractures of lumbar vertebral body or dislocation.
Further describe technical scheme of the present invention below by the embodiment accompanying drawing, but the invention is not restricted to described embodiment.
Description of drawings:
Fig. 1 is an overall structure sketch map of the present invention.1. connecting screw rods among the figure; 2. straight peen tapping screw; 3. plagiocephaly tapping screw; 4. strut sleeve; 5. hemispherical nut.
Fig. 2 connecting screw rod structural representation.
Fig. 3 straight peen tapping screw structural representation.
Fig. 4 plagiocephaly tapping screw structural representation.
Fig. 5 struts the sleeve sketch map.
Fig. 6 hemispherical nut sketch map.
The specific embodiment: as shown in the figure, anti-rotation internal fixator for setting of bone fracture, constitute 2 two pieces of straight peen tapping screws, 3 two pieces of plagiocephaly tapping screws by following elements, 1 two of connecting rod screw rods, strut 4 two in sleeve, 5 two on hemispherical nut is pressed structural representation and is connected, using 2 covers clinically is a pair, and promptly spinal column left and right sides pedicle of vertebral arch all will be fixed.Half is hexagon for a connecting screw rod 1, and second half is a threaded rod, cooperates to strut sleeve 4, can do prolongation to a certain degree or strut to satisfy resetting of dissimilar lumbar vertebra compression fractures.Elsewhere, hexagonal connecting screw rod 1 links to each other with plagiocephaly tapping screw 3, can prevent rotation; The oval foramen 6 of connecting rod one end, its diameter are convenient to adapt to spinal fracture in various degree greater than straight peen tapping screw 2, make to be inserted in more easily, and can adapt to has 30 ° of left rotation and right rotation, compresses 30 ° of spinal fractures and all can be inserted in easily.Greater than this angle, also can be inserted in smoothly by operating apparatus is auxiliary.
During operation with two pedicle screws, implant on the fracture respectively, in the pedicle of vertebral arch of hypocentrum, left-right symmetric, totally four pedicle screws, confirm through the X sheet in the art, after screw position was correct, it was among the hexagon ring of plagiocephaly tapping screw 3 that the hexagonal bar of connecting screw rod 1 is inserted pedicle screw, and it is on the straight peen tapping screw 2 that the oval foramen 6 of the other end is inserted in another piece pedicle screw, tighten hemispherical nut 5, can correct the rotation of fractured vertebral body, turn and strut sleeve 4, can strut the vertebral body of compression, therefore, simple to operate, really fixing, back loss angle and rotation can not occur resetting.The present invention is because connecting screw rod 1 one ends are hexagon, plagiocephaly tapping screw 3 adopts hexagon to cooperate with connecting screw rod 1, can prevent the rotation of this screw on connecting screw rod 1, and strut sleeve 4 owing to adopted, turn this sleeve, tapping screw can be strutted again, fractured vertebral body can be resetted well.
Claims (4)
1. anti-rotation internal fixator for setting of bone fracture, by connecting screw rod (1), straight peen tapping screw (2), plagiocephaly tapping screw (3), nut (5) is formed, it is characterized in that connecting screw rod (1) is a whole bar, the one end is a hexagon, the other end is a plagiocephaly, straight peen self-tapping screw nail (2) inserts in the plagiocephaly hole (6) of connecting screw rod (1), and fixing with nut (5), plagiocephaly self-tapping screw nail (3) has hex hole and is enclosed within the hexagonal end of connecting screw rod, has one to strut sleeve (4) and connecting screw rod employing threaded engagement between two screws.
2. anti-rotation internal fixator for setting of bone fracture according to claim 1 is characterized in that described plagiocephaly hole (6) is the oval hole, and described oval hole length is 1.5-2 a times of straight peen tapping screw diameter.
3. anti-rotation internal fixator for setting of bone fracture according to claim 1 is characterized in that described nut (5) is the hemispherical nut, and the radius of hemispherical nut (5) is identical with the concave size of the plagiocephaly of connecting screw rod (1).
4. anti-rotation fracture reduction fixator according to claim 1, it is identical to it is characterized in that described connecting screw rod (1) and plagiocephaly self-tapping screw are followed closely the two plagiocephaly angle of inclination, 0-10 ° of its range of tilt angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99115100 CN1132556C (en) | 1999-08-24 | 1999-08-24 | Anti-rotation internal fixator for setting of bone fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99115100 CN1132556C (en) | 1999-08-24 | 1999-08-24 | Anti-rotation internal fixator for setting of bone fracture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1254545A CN1254545A (en) | 2000-05-31 |
| CN1132556C true CN1132556C (en) | 2003-12-31 |
Family
ID=5278116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99115100 Expired - Fee Related CN1132556C (en) | 1999-08-24 | 1999-08-24 | Anti-rotation internal fixator for setting of bone fracture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1132556C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2823095B1 (en) * | 2001-04-06 | 2004-02-06 | Ldr Medical | RACHIS OSTEOSYNTHESIS DEVICE AND PLACEMENT METHOD |
| KR100379194B1 (en) * | 2001-10-31 | 2003-04-08 | U & I Co Ltd | Apparatus for fixing bone |
| CN105326546A (en) * | 2014-08-11 | 2016-02-17 | 天津康立尔生物科技有限公司 | Pedicle screw system |
-
1999
- 1999-08-24 CN CN 99115100 patent/CN1132556C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1254545A (en) | 2000-05-31 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AR01 | Abandonment of patent right to avoid double patenting |
According to article 9 of the patent law and article 13 of the detailed rules for the implementation of the patent law: 99115100.3 of the invention patents in this issue as a notice of authorization, and at the same time corresponding to the 99232424.6 utility model patent to be given up, and in the 19 volume of the 53 issue of the new type of communique on the patent right to abandon the announcement. |
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| 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 |