CN202497229U - Anti-loose hollow compression screw used for fracture internal fixation - Google Patents
Anti-loose hollow compression screw used for fracture internal fixation Download PDFInfo
- Publication number
- CN202497229U CN202497229U CN2012200793616U CN201220079361U CN202497229U CN 202497229 U CN202497229 U CN 202497229U CN 2012200793616 U CN2012200793616 U CN 2012200793616U CN 201220079361 U CN201220079361 U CN 201220079361U CN 202497229 U CN202497229 U CN 202497229U
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- fracture
- compression screw
- hollow compression
- screw
- internal fixation
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Abstract
The utility model relates to the technical field of medical devices, and discloses an anti-loose hollow compression screw used for fracture internal fixation. The hollow compression screw is characterized in that the hollow compression screw is composed of a head portion (1), a body portion (2) and a tail portion (3), the tail portion is bulged, an inner hexagonal groove (3.1) is arranged on the end surface of the tail portion, a tail hole (3.2) is arranged on the side surface of the tail portion for one or more steel wires used for fixation being threaded through so as to bind the hollow compression screw to fracture blocks. The tail hole is arranged on the hollow compression screw of the utility model, so the hollow compression screw is bound to the fracture blocks through the steel wires for fracture tension side steel wire winding fixation and can be used to provide persistent dynamic compression in the process of postoperative functional exercises, so the loose phenomenon or the nail removal phenomenon will not appears on the hollow compression screw, so fracture portions can be effectively fixed, so that the fracture internal fixation puzzle which is not solved clinically for a long time is solved.
Description
Technical field
This utility model relates to technical field of medical instruments, is a kind of anti-loosening hollow forcing screw of the internal fixation that is used to fracture.
Background technology
Clinically, the fracture for positions such as patella, olecroanon, medial and lateral malleolus, greater tubercles of humerus adopts Kirschner wire steel wire tension band technique for fixing usually; It is made up of Kirschner wire and steel wire; Fix piercing two Kirschner wires after the reduction of the fracture, the syringe needle of two Kirschner wires all passes cortex, two backshank bendings respectively; To be exposed to again and be the figure of eight with steel wire between two outer syringe needles of cortical bone and two backshanks and twine, and make the locking of fracture tension side and add press fit.This technology is simple and practical, and be widely used clinically, but exist following not enough: 1) Kirschner wire itself is smooth, can't implement initial press to fracture site, and occurs the withdraw of the needle phenomenon during postoperative function exercise easily; 2) syringe needle, backshank expose cortical bone, can cause that not only the local soft tissue irritable inflammation causes pain, and postoperative often makes skin bulge, influence attractive in appearance and subjective feeling.Given this, the someone adopts hollow half-thread screw to replace Kirschner wire, with the reduction of the fracture with the Kirschner wire positioning and fixing after, through hollow half-thread screw inner chamber with the Kirschner wire be lead screw threads gone into the fractures position after, take out Kirschner wire again.This hollow half-thread screw is made up of head, body and afterbody, the diameter of its inner chamber and the thickness of Kirschner wire coupling, and screw head is provided with tapping screw thread; The smooth screw thread of not establishing of body; The bulging of screw afterbody, end face is provided with interior hexagonal groove, so that screw in screw with the hex(agonal)screw cutter.Adopt the fracture advantage of internal fixation of hollow half-thread screw to be: 1) because the afterbody of screw is thick than head; When tightening the head end screw thread its pulling force is arranged backward; Produce the automatic pressurization between sclerite, help making up of slit and resetting of fracture site: 2) the screw afterbody need not to pass cortical bone, needn't twine by the reuse steel wire; Thereby surgical site is comparatively attractive in appearance, and patient's subjective feeling is good.
But hollow half-thread screw carries out behind the internal fixation along with still there is the defective of becoming flexible or move back nail easily in movable passing with the time fracture site.
Summary of the invention
The purpose of this utility model provides a kind ofly both can carry out initial press to sclerite and fix, and can prevent screw loosening again or move back the anti-loosening hollow forcing screw of fracture internal fixation that the nail phenomenon takes place.
This utility model is the improvement to above-mentioned hollow half-thread screw and Kirschner wire steel wire tension band technique for fixing.The hollow forcing screw of this utility model is made up of head, body and afterbody; Head is provided with tapping screw thread; The smooth screw thread of not establishing of body, the end face of afterbody is provided with interior hexagonal groove, it is characterized in that the afterbody side is provided with a uropore; This uropore ovalize or other shapes are used to pass one or more and fix with steel wire to be bundled in sclerite.
During the bone fixation folded block screw is screwed into to the big bone direction by the ossiculum piece, guarantees that the screw thread of screw head is all crossed fracture line, produce initial press.During use, squeeze into one or more Kirschner wire after by routine sclerite being resetted, through X line perspective confirm fracture fixation reset good after; Earlier on cortical bone, make a call to a shallow bore hole along Kirschner wire, select the hollow forcing screw of respective model to be screwed in the bone then, should observe fracture line when being screwed into screw along Kirschner wire with hollow boring bit; After confirming that the initial press effect resets the fracture face to make into fracture line up; Extracting the Kirschner wire of hollow forcing screw inner chamber out, is the boundary with the fracture line, cross drilling on the sclerite of screw head one side; End with steel wire passes this hole then; The other end that passes again behind the uropore of screw afterbody with steel wire is fastened, and wipes out unnecessary steel wire, with twining the recess of part bending below the screw afterbody.As required, can pass one or more steel wire in the same uropore.Usually, use 2～3 pieces of screws can accomplish fracture fixation after patella, olecroanon, fracture of medial malleolus reset, external malleolus etc. are located fracture and are used 1 piece of screw to get final product.
The hollow forcing screw of this utility model is owing to be provided with uropore; In sclerite, the tension side steel wire of fracturing is fastened through steel wire bundle, and postoperative function can provide lasting power pressurization when taking exercise; Therefore; Hollow forcing screw can not occur loosening again or move back the nail phenomenon, effectively fixing fracture site, thus solved a fracture internal fixation difficult problem that does not have solution clinically for a long time.
Description of drawings
Fig. 1 is the hollow forcing screw side-looking structural representation of this utility model.
Fig. 2 is the hollow forcing screw tail end face structural representation of this utility model.
The specific embodiment
Combine accompanying drawing that this utility model is described in detail at present.
The hollow forcing screw of this utility model is made up of head 1, body 2 and afterbody 3, and head 1 is provided with tapping screw thread; Body 2 between head 1 and afterbody 3, the smooth screw thread of not establishing; Afterbody 3 bulgings, end face are provided with interior hexagonal groove 3.1, and the side of afterbody 3 is provided with a uropore 3.2, and uropore 3.2 ovalizes or other shapes are used to pass one or more steel wire to be bundled in sclerite.
This utility model can be processed the different specifications model according to the difference of using the position.
Claims (2)
1. the anti-loosening hollow forcing screw of fracture internal fixation is made up of head (1), body (2) and afterbody (3), and head (1) is provided with tapping screw thread; Body (2) is positioned between head (1) and the afterbody (3), the smooth screw thread of not establishing; Afterbody (3) bulging, end face is provided with interior hexagonal groove (3.1), it is characterized in that the side of afterbody (3) is provided with a uropore (3.2).
2. by the anti-loosening hollow forcing screw of the described fracture internal fixation of claim 1, it is characterized in that uropore (3.2) ovalize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200793616U CN202497229U (en) | 2012-03-05 | 2012-03-05 | Anti-loose hollow compression screw used for fracture internal fixation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200793616U CN202497229U (en) | 2012-03-05 | 2012-03-05 | Anti-loose hollow compression screw used for fracture internal fixation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202497229U true CN202497229U (en) | 2012-10-24 |
Family
ID=47033863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200793616U Expired - Fee Related CN202497229U (en) | 2012-03-05 | 2012-03-05 | Anti-loose hollow compression screw used for fracture internal fixation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202497229U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102579125A (en) * | 2012-03-05 | 2012-07-18 | 中国人民解放军第二军医大学 | Fracture internal-fixation anti-looseness hollow compression screw |
-
2012
- 2012-03-05 CN CN2012200793616U patent/CN202497229U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102579125A (en) * | 2012-03-05 | 2012-07-18 | 中国人民解放军第二军医大学 | Fracture internal-fixation anti-looseness hollow compression screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20150305 |
|
| EXPY | Termination of patent right or utility model |