CN2383486Y - Power pressing screw - Google Patents
Power pressing screw Download PDFInfo
- Publication number
- CN2383486Y CN2383486Y CN 99228953 CN99228953U CN2383486Y CN 2383486 Y CN2383486 Y CN 2383486Y CN 99228953 CN99228953 CN 99228953 CN 99228953 U CN99228953 U CN 99228953U CN 2383486 Y CN2383486 Y CN 2383486Y
- Authority
- CN
- China
- Prior art keywords
- screw
- cortex
- threaded sleeve
- hollow
- tapping
- 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 a power pressing screw, which relates to a fracture internal fixer with the double action of power and static performance pressure. The utility model is particularly suitable for treating the fracture of the neck of a femur. The utility model has a structure which is composed of a hollow self-tapping tension screw, a cortex threaded sleeve pipe and a pressurization screw bolt. The cortex threaded sleeve pipe is sheathed on the polished rod part of the hollow self-tapping tension screw. The pressurization screw bolt is screwed in the inner threads of the tail end of a hollow self-tapping pressurization screw. The hollow self-tapping tension screw forms a hollow circular pipe shape. The head end of the hollow self-tapping tension screw is provided with spongy bone pressurization threads and is self-tapping threads. The inner hole of the tail part of the hollow self-tapping tension screw is provided with inner threads. The cortex threaded sleeve pipe forms a hollow circular pipe shape. The exterior of the cortex threaded sleeve pipe is provided with threads and the tail end of the cortex threaded sleeve pipe is provided with a groove forming the shape of the Chinese character 'yi'.
Description
What this utility model power forcing screw related to is a kind of bone fracture internal fixing device with dynamic property and firm static pressurization dual function, is specially adapted to treat fracture of femoral neck.
The internal fixation kind of fracture of femoral neck is more, but pluses and minuses are respectively arranged, as three wing nail, Pugh nail, Richards nail, hollow double end forcing screw etc., the big complicated operation of some operation wound, generally curative effect is not satisfied, the disunion rate and late period the femur head necrosis rate still higher, fracture of femoral neck is used the fixing fracture of many pieces of screws at present, no matter be single head screw or dowel screw, all have screw loosening, the first-class problem of most advanced and sophisticated break-through femur.
The purpose of this utility model is the weak point that exists at the fracture of femoral neck holder, a kind of power forcing screw is provided, has hollow self tapping lag screw, the cortex threaded sleeve, pressurization bolt has the firm static pressurization twice in operation, postoperative favourable again during with physical activity the pressurization of being used as power property of gravity produce the enough compressive stress that stimulate union of fracture, reasonable in design, light and handy, easy to operate have an ability of bearing a heavy burden preferably.
The power forcing screw takes following scheme to realize: power forcing screw structure is made of hollow self tapping lag screw, cortex threaded sleeve, pressurization bolt, it is tubular that hollow self tapping lag screw is the hollow garden, head end has spongy bone pressurization screw thread, the pressurization end of thread is a tapping screw thread, energy self tapping, afterbody endoporus have female thread and pressurization bolt to coincide.The cortex threaded sleeve is enclosed within hollow self tapping lag screw polished rod position, and pressurization bolt is screwed in the female thread of hollow self tapping forcing screw tail end.It is tubular that the cortex threaded sleeve is the hollow garden, matches with hollow self tapping lag screw in the hole, and there is screw thread cortex threaded sleeve outside, and cortex threaded sleeve tail end has " one " word groove.
The power forcing screw is reasonable in design, simple in structure, light and handy, easy to operate have an ability of bearing a heavy burden preferably, in the operation of power forcing screw the firm static pressurization is arranged twice, favourable again being used as power property of the action of gravity pressurization during with physical activity of postoperative has the enough compressive stress of the union of fracture of stimulation, and power forcing screw compressive property is good, bearing capacity is strong, stress-shielding effect is little, and the broken ends of fractured bone has the power pressurization, has certain anti-twisting property.
The utility model is described in further detail below with reference to accompanying drawing.
Fig. 1 is a power forcing screw structural representation.
Fig. 2 is a hollow self tapping lag screw sketch map in this utility model.
Fig. 3 is a cortex threaded sleeve sketch map in this utility model.
Form by hollow self tapping lag screw 1, cortex threaded sleeve 2, pressurization bolt 3 with reference to accompanying drawing power forcing screw structure, it is tubular that hollow self tapping lag screw 1 is the hollow garden, head end has spongy bone pressurization screw thread 4, the pressurization screw thread is a tapping screw thread, the afterbody endoporus has female thread 5, and hollow self tapping lag screw 1 tail end has " one " word groove.Cortex threaded sleeve 2 is sleeved on hollow self tapping lag screw 1 polished rod position, pressurization bolt 3 is screwed in and clamps cortex threaded sleeve 2 in the afterbody inner hole thread of hollow self tapping lag screw, there is screw thread 7 cortex threaded sleeve 2 outsides, cortex threaded sleeve tail end has " one " word groove 8, pressurization bolt 3 tail ends are interior hexagon, and total length has screw thread.
Claims (3)
1, a kind of power forcing screw, it is characterized in that structure is made of hollow self tapping lag screw, cortex threaded sleeve, pressurization bolt, the cortex threaded sleeve is sleeved on hollow self tapping lag screw polished rod position, and pressurization bolt is screwed in the female thread of hollow self tapping forcing screw tail end.
2, power forcing screw according to claim 1, it is tubular to it is characterized in that hollow self tapping lag screw is the hollow garden, and it is tapping screw thread that head end has spongy bone pressurization screw thread, and the afterbody endoporus has female thread.
3, power forcing screw according to claim 1, it is tubular to it is characterized in that the cortex threaded sleeve is the hollow garden, and there is screw thread the outside, and tail end has " one " word groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228953 CN2383486Y (en) | 1999-07-23 | 1999-07-23 | Power pressing screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228953 CN2383486Y (en) | 1999-07-23 | 1999-07-23 | Power pressing screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2383486Y true CN2383486Y (en) | 2000-06-21 |
Family
ID=34018253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99228953 Expired - Fee Related CN2383486Y (en) | 1999-07-23 | 1999-07-23 | Power pressing screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2383486Y (en) |
-
1999
- 1999-07-23 CN CN 99228953 patent/CN2383486Y/en not_active Expired - Fee Related
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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 |