CN201684012U - Limited dynamic hip screw - Google Patents
Limited dynamic hip screw Download PDFInfo
- Publication number
- CN201684012U CN201684012U CN2010202202503U CN201020220250U CN201684012U CN 201684012 U CN201684012 U CN 201684012U CN 2010202202503 U CN2010202202503 U CN 2010202202503U CN 201020220250 U CN201020220250 U CN 201020220250U CN 201684012 U CN201684012 U CN 201684012U
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- screw
- tail
- locking
- power
- fracture
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Abstract
The utility model provides a limited dynamic hip screw, which mainly consists of a dynamic screw, a gooseneck steel plate sleeve, a tail screw and a locking tail cap. A sliding cavity is arranged between the tail screw and the locking tail cap, the length of a cavity body of the sliding cavity between the tail screw and the locking tail cap ranges from 0.3 millimeter to 0.5 millimeter, the locking tail cap is provided with outer screw thread, the rear end of the gooseneck steel plate sleeve is provided with inner screw thread, and the inner and outer screw threads are screwed and locked. On the basis of keeping double pressurizing of dynamic power sliding pressurizing and static power pressurizing in the prior art, the sliding cavity effectively limits possible complications such as main screw backing-out, tail screw loosening, femoral neck shrinkage, fracture displacement and the like which are caused by unlimited outward movement of the dynamic screw and the tail screw, not only is favorable for stabilizing hip joint fracture internal fixation, but also can promote fracture healing, increases cure rate, and shortens treatment cycle.
Description
Technical field
This utility model relates to the medical apparatus and instruments for the treatment of fracture, particularly a kind of limited screw of power hip joint for the treatment of Hip Fracture.
Background technology
According to incompletely statistics, Hip Fracture and included fracture of femoral neck and intertrochanteric fracture of the femur case load in these years are tangible ascendant trend.Wherein intertrochanteric fracture of the femur mostly occurs again the crowd at advanced age.Clinical research shows that the cure rate of operative treatment is far above the cure rate of expectant treatment.For many years, the success of operative treatment have benefited from a kind of be referred to as screw of power hip joint (dynamic hip screw, DHS).This screw is the combination type screw, mainly is made of power screw, geese-head steel plates sleeve and tail nail.Because it has structurally realized the dual pressurization of power and static(al), makes the fracture site fixation reliable, helps the healing of fracture site and patient's early ambulant.Thereby screw of power hip joint is still generally acknowledge in the industry a kind of easy to use for a long time, the reliable medical apparatus and instruments of fracture internal fixation.But, senile intertrochanteric fracture of the femur often is a comminuted fracture, broken ends of fractured bone complex shape, the femur square is lost support again, unstable fracture with the fixing old femoral intertrochanteric of screw of power hip joint, its unconfined dynamic property pressurization can make near-end bone piece and power screw outwards, continue downwards) the displacement pressurization, old in addition hip is often with osteoporosis, easily cause main nail to move back nail, the tail nail becomes flexible, neck of femur cripetura and fracture redisplacement or cutting penetrate the first-class complication of femur, and cause the treatment failure.At this situation, the utility model Granted publication number is the patent of CN200998304Y, has proposed a kind of " locking screw of power hip joint ".Its structure to described screw of power hip joint is improved, make " being processed with the internal and external threads that cooperatively interacts on the excircle of the nail tail of tail nail with on the geese-head steel plates sleeve rear end inner headed face ", though this locking device can effectively prevent the generation of above-mentioned complication, but also there is certain weak point in it, show that mainly this device easily makes the limb stress concentration cause broken nail in the nail-plate junction, disconnected plate phenomenon, the great advantage of motive power hip screw is to reach tangible promotion union of fracture effect by the power pressurization in addition, and this device go motorization, then changed its action principle, also eliminated it and promoted the initial design concept of union of fracture.
Summary of the invention
The utility model proposes a kind of limited screw of power hip joint, purpose is by the structure of existing hip screw is improved, to realize the power and the dual pressurization of static(al) of degree of having, make the fracture site fixation reliable, be not prone to and move back nail or cutting penetrates capital failure therapeutic effect.
Technical solution of the present utility model:
This utility model is the combination type screw, comprises power screw, geese-head steel plates sleeve, the tail nail of prior art " screw of power hip joint ".Different is that it also is provided with locking tail medicated cap, is provided with between described tail nail and the locking tail medicated cap and slides the chamber.The cavity length that slides the chamber between described tail nail and the locking tail medicated cap is between the 0.3-0.5 millimeter; Described locking tail medicated cap is provided with the external screw thread screw thread, and the geese-head steel plates sleeve rear end is provided with the female thread screw thread, the locking that spins of internal and external screw thread screw thread.
The beneficial effects of the utility model
This utility model has designed locking tail medicated cap, has reached to have reserved between tail nail and locking tail medicated cap and slide the chamber, be on the basis of the dual pressurization principle that keeps prior art power slip pressurization and static(al) pressurization, and then restricted power screw and tail nail is unconfined effectively again outer moves that the main nail that institute may cause moves back nail, tail is followed closely and become flexible the generation of complication such as neck of femur cripetura and fracture redisplacement; Both help the stable of hip fracture internal fixation, and can promote the healing of fracturing again, thereby improve cure rate, shortened treatment cycle.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment
As shown in the figure,
This utility model is referred to as limited screw of power hip joint mainly to be made up of power screw 1, geese-head steel plates sleeve 2, tail nail 3 and locking tail medicated cap 4, is provided with between tail nail and the locking tail medicated cap and slides chamber 5; Described locking tail medicated cap is provided with the external screw thread screw thread, and the geese-head steel plates sleeve rear end is provided with the female thread screw thread, the locking that spins of internal and external screw thread screw thread.The described cavity length that slides the chamber is between the 0.3-0.5 millimeter, and optimum length is 0.4 millimeter.This utility model institute materials used is two kinds of medical stainless steel and titanium alloys; The diameter of power screw and length, the telescopic internal diameter of geese-head steel plates, and the specification of gooseneck boom gooseneck angle all same as the prior art.
Below in conjunction with accompanying drawing, the use of summary explanation this utility model:
Limited screw of power hip joint is used in the reduction of the fracture, by holing to the diaphysis tapping, being screwed into power screw 1, and with the jacket casing of geese-head steel plates on the stayed mast of power screw, the tail nail and the sleeve of geese-head steel plates are tightened, make fracture site tightly involutory, the pressurization of realization firm static, the locking tail medicated cap of screwing at last.Certainly above use operation must be practiced what they preach by veteran operative doctor.This utility model is on reservation power screw effectively slides the fixed basis of pressurizeing, again by locking the barrier effect of tail medicated cap, controlled effectively because after the too early activity of patient's limbs or the heavy burden, the fracture near-end continued to be outside one's consideration to move and causes main nail to move back complication appearance such as nail and fracture redisplacement, can reach the goal of the invention of expection.
Claims (4)
1. limited screw of power hip joint comprises power screw, geese-head steel plates sleeve, tail nail, it is characterized in that: it also is provided with locking tail medicated cap; And be provided with between described tail nail and the locking tail medicated cap and slide the chamber.
2. limited screw of power hip joint according to claim 1 is characterized in that: the cavity length that slides the chamber between described tail nail and the locking tail medicated cap is between the 0.3-0.5 millimeter.
3. limited screw of power hip joint according to claim 1 and 2 is characterized in that: the cavity length the best that slides the chamber is 0.4 millimeter.
4. limited screw of power hip joint according to claim 1 is characterized in that: described locking tail medicated cap is provided with the external screw thread screw thread, and the geese-head steel plates sleeve rear end is provided with the female thread screw thread, the locking that spins of internal and external screw thread screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202202503U CN201684012U (en) | 2010-06-03 | 2010-06-03 | Limited dynamic hip screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202202503U CN201684012U (en) | 2010-06-03 | 2010-06-03 | Limited dynamic hip screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201684012U true CN201684012U (en) | 2010-12-29 |
Family
ID=43372303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202202503U Expired - Fee Related CN201684012U (en) | 2010-06-03 | 2010-06-03 | Limited dynamic hip screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201684012U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105596069A (en) * | 2016-02-17 | 2016-05-25 | 陆海波 | Internal fixing device for treating femoral neck fracture |
| CN112155701A (en) * | 2020-10-10 | 2021-01-01 | 江山市人民医院 | Adjustable screw for calcaneus |
| CN112790849A (en) * | 2020-12-30 | 2021-05-14 | 南方医科大学 | Two-way pressurization limit for a distance slip screw of thighbone neck and screwdriver |
-
2010
- 2010-06-03 CN CN2010202202503U patent/CN201684012U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105596069A (en) * | 2016-02-17 | 2016-05-25 | 陆海波 | Internal fixing device for treating femoral neck fracture |
| CN105596069B (en) * | 2016-02-17 | 2019-07-26 | 陆海波 | A kind of inner fixing device for treating fracture of neck of femur |
| CN112155701A (en) * | 2020-10-10 | 2021-01-01 | 江山市人民医院 | Adjustable screw for calcaneus |
| CN112155701B (en) * | 2020-10-10 | 2023-03-28 | 江山市人民医院 | Adjustable screw for calcaneus |
| CN112790849A (en) * | 2020-12-30 | 2021-05-14 | 南方医科大学 | Two-way pressurization limit for a distance slip screw of thighbone neck and screwdriver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20110603 |