CN2209507Y - Expansion pressure bone bolt - Google Patents
Expansion pressure bone bolt Download PDFInfo
- Publication number
- CN2209507Y CN2209507Y CN 94248531 CN94248531U CN2209507Y CN 2209507 Y CN2209507 Y CN 2209507Y CN 94248531 CN94248531 CN 94248531 CN 94248531 U CN94248531 U CN 94248531U CN 2209507 Y CN2209507 Y CN 2209507Y
- Authority
- CN
- China
- Prior art keywords
- sleeve pipe
- fracture
- casing tube
- bone bolt
- push rod
- 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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- Prostheses (AREA)
Abstract
The utility model relates to an expansion pressurization bone bolt for fixing femoral neck fracture, which is composed of a casing tube, a post rod, fixing nuts, etc., wherein, one end of the casing tube is provided with a supporting piece; the inner wall of the end part of the supporting piece is provided with a convexity. The other end of the casing tube is provided with external threads; a pressurization nut is connected to the external threads. The post rod is positioned in the casing tube; one end of the post rod is provided with a supporting head which is positioned at the supporting piece end in the casing tube. The fixing nuts are double thread nuts. The utility model has strong rotation resistance, separation resistance and shearing resistance capability, and is good for early healing of fracture. Because the top force expansion structure is taken, the expansion pressurization bone bolt not only is easy to take out but also has no any damage to spongy bones after the fracture is healed.
Description
This utility model relates to a kind of expansion pressurization bone bolt for the treatment of internal fixation the bone bolt, particularly a kind of fixed fracture of femoral neck of fracture.
Usually, the fixture that adopts in the compromise of treatment femoral neck bone mostly is three flanged nail greatly, three pins and AO pulling force compression screw etc., this class fixture has fixing not firm defective in varying degrees, postoperative often skids off inside-fixture because of lower limb outward turning or interior receipts, fracture end separates, dislocation, cause operative failure, and must not no longer do other compensating operation, utility model patent communique 4 volumes once disclosed a kind of notification number No. 21 and are: 87211219 patent its objective is in order to overcome above shortcoming, provide a kind of and can make the fracture end fixation, the expansion type nail that is difficult for skidding off, this nail adopts the pulling force expansion structure, mainly by bolt, nut, sleeve pipe three parts constitute, in the time of fixedly, be by the outside tensile bolt of the nut of swivel bolt afterbody, sleeve pipe top nail slit bamboo or chopped wood strutted, realize its purpose by round platform inclined-plane, bolt top.Owing to be to utilize the bolt top sleeve pipe top nail slit bamboo or chopped wood to be strutted greater than the round platform of sleeve pipe Zhou Jing, make and extract comparatively difficulty, when particularly extracting, need bolt is done beating and rotate 60 ° nail slit bamboo or chopped wood loxosis groove is thrown off slightly, take out nail, this also certainly will cause bolt top spongy bone compressive damage, and prognosis is not good.
The purpose of this utility model is to provide a kind of expansion pressurization bone bolt of fixation for treatment fracture of femoral neck, it is not only simple in structure, easy to operate, have stronger anti-rotation, the anti-separation and shearing resistance, make its fixing-stable firmly be difficult for deviating from, and help fracture heals in early days, simultaneously, after the union of fracture, be easy to take out, and spongy bone is not had any damage.
Its concrete solution is: be made of parts such as sleeve pipe, push rod, hold-down nut, pressurizing nuts, adopt top power expansion structure, sleeve pipe one end is processed into the support sheet that is at least 3 vertically, and this support sheet end inwall is provided with projection, is the inclined-plane with protruding transition face in the sleeve pipe, and support sheet end periphery is provided with groove, support sheet outer surface is processed with annular knurl, with the frictional force of increase with bone, the sleeve pipe other end is provided with external screw thread, is connected with pressurizing nut on it.Push rod is positioned at sleeve pipe, and push rod one end is a fastener, is positioned at sleeve pipe internal stay sheet end, and the push rod other end is provided with screw thread, and in order to be connected and fixed nut, hold-down nut is two screw nuts, and two screw nuts also are fixed on the casing threads end simultaneously.Two screw nuts are provided with groove so that sleeve pipe is extracted.During use,, utilize fastener will overlap the tube stay sheet and strut, tighten pressurizing nut and can realize its fixedly purpose by the rotation push rod.
In conjunction with the accompanying drawings this utility model is described in detail below by embodiment:
Fig. 1 is the structural representation under this utility model duty.
Fig. 2 is this utility model sleeve structure sketch map.
Fig. 3 is this utility model A-A profile.
In the present embodiment, push rod (5) is positioned at sleeve pipe (1), sleeve pipe (1) one end is processed with external screw thread, be connected with pad (2) and pressurizing nut (3) on it, the other end is cut to its casing wall 4 vertically as the support sheet, and this end sleeve pipe internal stay sheet end is a △ shape projection, this end sleeve pipe is outside equipped with groove, support sheet outer surface is processed with annular knurl, and push rod (5) one ends are processed with external screw thread, and the other end is fastener (6).Sleeve pipe (1) and push rod (5) are provided with a threaded end and are connected with hold-down nut (4).
During clinical operation, make " L " otch of the tuberosity part outside, appear fracture and enter the spigot position, involutory the resetting of will fracturing, 2-3cm squeezes at the place three Kirschner wires under tuberosity, wherein position the best is selected in the film making location, holes with core drill, then extract this Kirschner wire reaming, the expansion pressurization bone bolt that length is suitable is put into the bone hole, to internal rotation push rod (5), will overlap the tube stay sheet by fastener (6) and strut, in the embedding spongy bone, then, tighten pressurizing nut (3) again, extract remaining two Kirschner wires and get final product.After the union of fracture, when needing the taking-up of expansion pressurization bone bolt, can make fastener break away from support sheet top △ shape boss earlier to the external rotation push rod, cover tube stay sheet can close up taking-up just can.
This utility model is simple in structure, easy to operate, meets biological requirement, because this expansion pressurization bone bolt head can embed in the bone after expanding, afterbody can pressurize again, formed axially to squeeze and made a concerted effort, made fracture end involutory tightr, thereby have stronger anti-rotation, the anti-separation and shearing resistance, the healing early that helps fracturing is again owing to adopting top power expansion structure, so after the union of fracture, not only be easy to take out, and spongy bone is not had any damage.
Through 4 routine dryness corpse, this bone bolt of 8 femoral hip prosthesis fracture of cervical vertebras fixation test has strong tension and anti-rotation performance; 4 routine fresh cadaver fracture of femoral neck internal fixation tests are stretched outward turning in the wrong, interior receipts 80-150 respectively surplus time repeatedly, and the fracture fixation end is all firm reliable; 20 routine clinic trial show, fixation, and postoperative needn't be gone traction braking, can sit up in postoperative 3-4 days, can hold up the activity of turning in 20 days with descending, and this utility model of probationary certificate is real to be a kind of inside-fixture of ideal fracture of femoral neck.
Claims (3)
1, a kind of expansion pressurization bone bolt, mainly constitute by sleeve pipe, push rod, it is characterized in that sleeve pipe (1) one end is provided with the support sheet, support sheet end inwall is provided with projection, and the sleeve pipe other end is provided with external screw thread, be connected with pressurizing nut (3) on it, push rod (5) is positioned at sleeve pipe, and push rod one end is fastener (6), is positioned at sleeve pipe internal stay sheet end, hold-down nut (4) is two screw nuts, is used for fixing sleeve pipe (1) and connects push rod (5).
2, expansion pressurization bone bolt according to claim 1 is characterized in that hold-down nut (4) is provided with groove.
3, expansion pressurization bone bolt according to claim 1 is characterized in that the periphery that supports sheet is provided with groove, and support sheet outer surface is processed with annular knurl.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94248531 CN2209507Y (en) | 1994-12-21 | 1994-12-21 | Expansion pressure bone bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94248531 CN2209507Y (en) | 1994-12-21 | 1994-12-21 | Expansion pressure bone bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2209507Y true CN2209507Y (en) | 1995-10-11 |
Family
ID=33853429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94248531 Expired - Fee Related CN2209507Y (en) | 1994-12-21 | 1994-12-21 | Expansion pressure bone bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2209507Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107260278A (en) * | 2017-07-27 | 2017-10-20 | 公安县二人民医院 | A kind of Pubic symphysis diastasis bone bolt internal fixation device |
-
1994
- 1994-12-21 CN CN 94248531 patent/CN2209507Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107260278A (en) * | 2017-07-27 | 2017-10-20 | 公安县二人民医院 | A kind of Pubic symphysis diastasis bone bolt internal fixation device |
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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 |