CN2382379Y - Internal fixer for anti-rotary bone fracture reposition - Google Patents
Internal fixer for anti-rotary bone fracture reposition Download PDFInfo
- Publication number
- CN2382379Y CN2382379Y CN 99232424 CN99232424U CN2382379Y CN 2382379 Y CN2382379 Y CN 2382379Y CN 99232424 CN99232424 CN 99232424 CN 99232424 U CN99232424 U CN 99232424U CN 2382379 Y CN2382379 Y CN 2382379Y
- Authority
- CN
- China
- Prior art keywords
- screw rod
- connecting screw
- plagiocephaly
- utility
- model
- 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
Images
Landscapes
- Surgical Instruments (AREA)
Abstract
The utility model 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 utility model 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 utility model is stronger in axial compression resistance, side bending resistance and rotation resistance. In addition, the utility model has the good reposition effect. After the utility model is applied to the clinical operation, the operation time can be saved by more than half an hour and the utility model can be applied to the bone fracture or the dislocation of vertebral bodies of single or two thoracic vertebra and lumbar vertebra.
Description
This utility model relates to a kind of medical implant, is specifically related to a kind of anti-rotation internal fixator for setting of bone fracture.
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 504 routine pedicles complication situation after fixing, wherein follow closely the loosening rate of bar and account for 4.8%, the broken nail rate account 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, 1995,15:570:572).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.
The purpose of this utility model is that design 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 utility model realizes by following proposal.
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, the one end is a hexagon, 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, plagiocephaly hole (6) are the oval hole, and micropyle length is 1.5-2 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 is identical, and its preferred angle scope is 0-10 °.
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 is correct, the hexagonal bar of connecting screw rod is inserted among the hexagon ring of pedicle screw (plagiocephaly tapping screw), the oval foramen of the other end is inserted on another piece pedicle screw (straight peen tapping screw), tighten the hemispherical nut, can correct the rotation of fractured vertebral body, turn and strut sleeve, 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 one end is a hexagon, and the plagiocephaly tapping screw adopts hexagon to cooperate with connecting screw rod, can prevent the rotation of this screw on connecting screw rod, and strut sleeve owing to adopted, turn this sleeve, tapping screw can be strutted again, fractured vertebral body can be resetted well.
The biomechanics comparative study of anti-rotation internal fixator for setting of bone fracture and other four kinds (Dick nail, Steffee, AF, RF) pedicle inner fixers 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.
This utility model is applied to single or two breast fractures of lumbar vertebral body or dislocation.
Further describe the technical solution of the utility model below by the embodiment accompanying drawing, but this utility model is not limited to described embodiment.
Fig. 1 is an overall structure sketch map of the present utility model.
Among the figure: 1. connecting screw rod; 2. straight peen tapping screw; 3. plagiocephaly tapping screw; 4. strut sleeve; 5. spheric 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 spheric nut sketch map.
As shown in the figure: anti-rotation internal fixator for setting of bone fracture, constitute by following elements, two pieces of straight peen tapping screws, two pieces of plagiocephaly tapping screws, two of connecting rod screw rods strut two in sleeve, two on hemispherical nut, press structural representation and connect, 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, and second half is a threaded rod, cooperates to strut sleeve, can do prolongation to a certain degree or strut to satisfy resetting of dissimilar lumbar vertebra compression fractures.In addition, hexagonal connecting screw rod links to each other with the plagiocephaly tapping screw, can prevent rotation; The hole, ovum garden of connecting rod one end, its diameter is convenient to adapt to spinal fracture in various degree greater than the straight peen tapping screw, makes 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.
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 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.
2. anti-rotation internal fixator for setting of bone fracture according to claim 1 is characterized in that plagiocephaly hole (6) is the oval hole, and micropyle length is 1.5-2 times of straight peen tapping screw diameter.
3. anti-rotation internal fixator for setting of bone fracture according to claim 1 and 2 is characterized in that 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).
4. anti-rotation internal fixator for setting of bone fracture according to claim 1 is characterized in that the two plagiocephaly angle of inclination of connecting screw rod (1) and plagiocephaly tapping screw is identical, and its preferred angle scope is 0-10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99232424 CN2382379Y (en) | 1999-08-24 | 1999-08-24 | Internal fixer for anti-rotary bone fracture reposition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99232424 CN2382379Y (en) | 1999-08-24 | 1999-08-24 | Internal fixer for anti-rotary bone fracture reposition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2382379Y true CN2382379Y (en) | 2000-06-14 |
Family
ID=34021111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99232424 Expired - Fee Related CN2382379Y (en) | 1999-08-24 | 1999-08-24 | Internal fixer for anti-rotary bone fracture reposition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2382379Y (en) |
-
1999
- 1999-08-24 CN CN 99232424 patent/CN2382379Y/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6113600A (en) | Device for linking adjacent rods in spinal instrumentation | |
| US9532822B2 (en) | Pedicle screw with reverse spiral cut and methods thereof | |
| CN108186092A (en) | The Universal pedicle screw that undercut mark easily locks | |
| US20220110663A1 (en) | Bone anchor | |
| CN209301273U (en) | A kind of fixed device of orthopedic spinal | |
| CN1132556C (en) | Anti-rotation internal fixator for setting of bone fracture | |
| US9763718B2 (en) | Bone screw | |
| CN2382379Y (en) | Internal fixer for anti-rotary bone fracture reposition | |
| CN204410946U (en) | A kind of elastic vertebra dynamic pedicle screw system | |
| CN200948163Y (en) | External Fixer for the recovering of knotty vertebral column | |
| CN101380245B (en) | Assistant orthopedic tool and tool package for scoliosis orthopedy | |
| CN2534985Y (en) | General spine vertebral arch interval fixation system | |
| CN209172474U (en) | Orthopedic screw is fixed in lumbar vertebral posterior | |
| CN210330710U (en) | Universal locking bone plate structure for spinal articular process | |
| CN2661115Y (en) | Multi-angle lateral mass type vertebral arch pedicle screw for medical use | |
| CN208942334U (en) | A kind of closed bone cement pedicle screw of band guide front end | |
| CN2379105Y (en) | Scoliosis orthopedic internal fixator | |
| CN111513834A (en) | Novel nail is got to orthopedics device | |
| CN2920174Y (en) | Spinal column reduction fixing vertebral arch root pin system | |
| CN215018753U (en) | Single-plane pedicle screw | |
| CN2601635Y (en) | Screw-rod angle pedicle fixation device | |
| CN110123431A (en) | One kind is autotomyed the fixed device of screw Universal pedicle screw | |
| CN216754583U (en) | Self-tapping pressurization pedicle screw | |
| CN2137500Y (en) | Orthopedic unit with angular positive-negative thread screw | |
| CN219538464U (en) | Anticreep formula fixing device for radius bone fracture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |