CN2243865Y - Internal fixing screw for fracture of neck of femur - Google Patents
Internal fixing screw for fracture of neck of femur Download PDFInfo
- Publication number
- CN2243865Y CN2243865Y CN 95206775 CN95206775U CN2243865Y CN 2243865 Y CN2243865 Y CN 2243865Y CN 95206775 CN95206775 CN 95206775 CN 95206775 U CN95206775 U CN 95206775U CN 2243865 Y CN2243865 Y CN 2243865Y
- Authority
- CN
- China
- Prior art keywords
- screw
- fracture
- shank
- sliding sleeve
- raceway
- 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
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Abstract
The utility model relates to an internal fixing screw for fracture of the neck of the femur. The utility model is used for the pressurization and the internal fixation of the broken end of the fracture when the fracture of the neck of the femur is reset. The internal fixing screw for fracture of the neck of the femur is composed of a screw rod and a sliding sleeve, and a locking mechanism which controls the screw rod to move only in the insertion direction is arranged between the screw rod and the sliding sleeve. When screws are arranged at both ends of the fracture of the neck of the femur, two end surfaces of the fracture can not only be ensured to be mutually pressed under the action of the contraction force of the muscles and part of the loading when the collapse is absorbed after pressing, but also be ensured to be locked when the fracture position is pulled away by other external force.
Description
This utility model relates to a kind of fracture of femoral neck and make the employed a kind of screw of fracture site pressurization internal fixation after resetting.
The internal fixation mode has (1) three wing nail internal fixation after the fracture of femoral neck reduction para-position, (2) differential forcing screw internal fixation, (3) many or single forcing screw internal fixation, (4) many root fractures formula forcing screw internal fixation, (5) many screw needles intersection internal fixation (or not intersecting), (6) three wing nail gooseneck steel plate internal fixation, also have many fish scale nails (or not having stricture of vagina) intersection or the internal fixation that do not intersect, sliding tray pressurization nail or the like, above all fixtures up to now, pressurize or do not pressurize no matter be, its pressure process all be once apply in the internal fixation operation (fracture site face normal direction pressurization is that short fracture end stablize the reliable means of para-position and healing) of finishing concerning the blood circulation difference difficult heal fracture of femoral neck, pressurization is even more important.
All fracture of femoral neck internal fixation methods install at present, and its effect mainly is that (1) keeps the fracture para-position to the line good state, absorbs, blocks the extraneous active force that destroys fracture stabilization.(2) the fracture face being implemented the normal direction pressurization provides stress stimulation to promote knitting.Because neck of femur blood operation approach and source are few, part, fracture back often is in ischemic state, the relatively large absorption of subsiding of inevitable generation, and the stress that disposable pressurization produced, strain disappears after the absorption of subsiding takes place thereupon, even sliding tray forcing screw, three wing nail also is a muscular strength, gravity has pressure in the time of will fracturing the face pressing, myodyamia effect opposite or extraneous when producing pulling force the fracture surface pressure disappear, produce to separate and become flexible, the healing condition is undesirable, and some staple such as differential pressurization nail, intersect nail after fracture end absorbs, still be supported between fracture two broken ends of fractured bone, it is more difficult to make the separation of fracture face disengage healing.
This utility model is at above-mentioned deficiency, proposes a kind of new internal fixation nail that pressurizes automatically, make the fracture face subside utilize after absorbing muscular strength, gravity and dynamically the effect of pressurization nail remain that involutory to contact pressurization stable, thereby create optimum condition for healing.
The technical solution of the utility model is such:
Form this utility model by shank of screw, sliding sleeve, the shank of screw head is a screw thread, and shaft is inserted in the sliding sleeve, and establishes control shank of screw and a sliding sleeve between shaft and the sliding sleeve and can only make the locking mechanism that direction of insertion is moved.
Locking mechanism is made up of spring, steel ball, and locking mechanism is located in the oblique raceway on the sliding sleeve inwall, or is located in the shank of screw oblique raceway on one's body.This raceway is located on the longitudinal section of sliding sleeve or shank of screw, and become 8-10 ° of angles with axis, spring, steel ball are located in the raceway successively, in case shank of screw is inserted in the sliding sleeve, just occur a wedge between the two, shank of screw can only move along direction of insertion, when raceway is located on the sliding sleeve, establish central through hole on the shank of screw, pass for guid needle.
Between shank of screw and sliding sleeve, rotate, the cross sectional shape of shaft and sliding sleeving hole can be designed to polygon.
In addition, the raceway bore guarantees that less than diameter of the steel ball steel ball can be by rolling out in the raceway.
Use principle of the present utility model is such:
The two ends of will fracturing are folded, and bore three pieces of guid needles to the femoral head direction routinely under femoral greater trochanter, and choosing wherein one piece of the most desirable person in position is stayed the Yu Liangmei femoral head that fixes as guid needle, and the threaded rod centre bore is put guid needle.Withstand shank of screw afterbody breach with the telescopic bottle opener of band guiding and screw in shank of screw to the tram to the femoral head roof pressure.The locking steel ball is located at the form on the screw rod in this way, then withdraw from shank of screw and guiding nail again, displacement screws in the locking screw rod, then unidirectional sliding latch sleeve pipe is inserted in shank of screw, push the shank of screw that is locked to the femoral head direction, blade plate slot and sliding sleeve afterbody stage portion are pegged graft, kowtow and hit femoral trochanteric and compress the far and near end of fracture, under femoral bone tuberosity, vertically install blade plate and get final product.
Technical characterstic of the present utility model and result of use:
(1) compact conformation is reliable, and is easy to use, automatization.
(2) since in the shank of screw or in the unidirectional sliding latch sleeve pipe the oblique raceway of steel ball stage clip and rolling surface have the direction of insertion slip, the effect of pull-out direction locking, thereby can guarantee that the fracture both ends of the surface are laminated under muscular contraction force and the effect of part negative G in the absorption back that subsides, this pressing is dynamically constantly to carry out automatically to the whole period that knitting ends after operation is finished, the strain that original pressure causes when muscular strength compression disappears is being kept by the locking action memory of device, locking then when other external force cause fractures and are pulled away from.And the fracture face subside absorb after, the slit of generation will be once more by pressing under the muscular strength compression.
Accompanying drawing and description of drawings:
Accompanying drawing is a structural representation of the present utility model, and 1 is shank of screw, the 2nd among the figure, sliding sleeve, the 3rd, locking steelball, the 4th, spring, the 5th, oblique raceway, the 6th, centre bore.
In conjunction with the accompanying drawings this utility model is done further narration:
One end of shank of screw is a screw thread, and shaft is smooth, and sliding sleeve 2 is a matched in clearance with shank of screw 1, and locking steelball 3 produces a wedge between shank of screw 1 and sliding sleeve 2 under the effect of spring 4, makes shank of screw 1 can only do the direction of insertion motion in sliding sleeve 2.
Claims (5)
1, a kind of fracture of femoral neck internal fixation screw is characterized in that it is made up of shank of screw, sliding sleeve, and the shank of screw head is a screw thread, and shaft is inserted in the sliding sleeve, and establishes the locking mechanism that a control shank of screw and sliding sleeve can only be made move toward one another between shaft and the sliding sleeve.
2, a kind of fracture of femoral neck internal fixation screw of narrating according to claim 1, it is characterized in that locking mechanism is made up of spring, steel ball, on the inwall of sliding sleeve, establish a raceway, this raceway is located on the longitudinal section of sliding sleeve, and become 8-10 ° of angles with the sliding sleeve axis, spring, steel ball are located in this raceway successively, establish central through hole on the shank of screw.
3, a kind of fracture of femoral neck internal fixation screw of narrating according to claim 1, it is characterized in that locking mechanism is made up of spring, steel ball, smooth shaft at shank of screw is established a raceway on one's body, this raceway is located on the longitudinal section of shank of screw, and becoming 8-10 ° of angles with the shank of screw axis, spring, steel ball are located in this raceway successively.
4, a kind of fracture of femoral neck internal fixation screw of being narrated according to claim 1 or 4 is characterized in that the raceway bore less than diameter of the steel ball, makes the steel ball can be by running out of in the raceway.
5, a kind of fracture of femoral neck internal fixation screw of narrating according to claim 1, the cross section that it is characterized in that shank of screw shaft and sliding sleeving hole is a polygon, the sliding sleeve afterbody is established step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95206775 CN2243865Y (en) | 1995-03-27 | 1995-03-27 | Internal fixing screw for fracture of neck of femur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95206775 CN2243865Y (en) | 1995-03-27 | 1995-03-27 | Internal fixing screw for fracture of neck of femur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2243865Y true CN2243865Y (en) | 1997-01-01 |
Family
ID=33858595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95206775 Expired - Fee Related CN2243865Y (en) | 1995-03-27 | 1995-03-27 | Internal fixing screw for fracture of neck of femur |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2243865Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101803943A (en) * | 2010-04-23 | 2010-08-18 | 刘志春 | Combined type clavicular intramedullary pin |
| CN103096839A (en) * | 2010-06-03 | 2013-05-08 | 史密夫和内修有限公司 | Orthopaedic implants |
| CN113069197A (en) * | 2021-04-12 | 2021-07-06 | 宋鹏 | Bone block lifting and fixing device and installation method |
-
1995
- 1995-03-27 CN CN 95206775 patent/CN2243865Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101803943A (en) * | 2010-04-23 | 2010-08-18 | 刘志春 | Combined type clavicular intramedullary pin |
| CN103096839A (en) * | 2010-06-03 | 2013-05-08 | 史密夫和内修有限公司 | Orthopaedic implants |
| CN107582129A (en) * | 2010-06-03 | 2018-01-16 | 史密夫和内修有限公司 | Orthopaedics implant |
| CN113069197A (en) * | 2021-04-12 | 2021-07-06 | 宋鹏 | Bone block lifting and fixing device and installation method |
| CN113069197B (en) * | 2021-04-12 | 2024-04-19 | 宋鹏 | Bone block lifting and fixing device and installation method |
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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 |