CN103027739A - Elastic dynamic hip screw - Google Patents
Elastic dynamic hip screw Download PDFInfo
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- CN103027739A CN103027739A CN2012104938089A CN201210493808A CN103027739A CN 103027739 A CN103027739 A CN 103027739A CN 2012104938089 A CN2012104938089 A CN 2012104938089A CN 201210493808 A CN201210493808 A CN 201210493808A CN 103027739 A CN103027739 A CN 103027739A
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- steel plate
- sleeve
- screw
- hip screw
- fracture
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Abstract
The invention discloses an elastic dynamic hip screw, which is provided with a lateral square steel plate which consists of a sleeve and a steel plate, wherein the steel plate is provided with pressurizing holes; the front part in the sleeve is sheathed with a lag screw; the rear part in the sleeve is provided with a tail pin; and the tail pin and the tail part of the lag screw are connected through threads. The elastic dynamic hip screw is characterized in that the inner wall of the sleeve is provided with a circular bead; a pressurizing spring is arranged between a nut of the tail pin and the circular bead; and the amount of compression of the pressurizing spring is 4-6mm. The elastic dynamic hip screw is simple in structure and convenient in use and can be used for promoting immediate union of fracture, and therefore, complications are avoided, and the cure rate of femoral intertrochanteric fracture is increased.
Description
Technical field
The present invention relates to a kind of elastic drive power hip screw.
Background technology
Intertrochanteric fracture of the femur (IFF) is modal a kind of in the Hip Fracture, accounts for 58.6% of Hip Fracture, multiplely is born in the old people, but increases along with social activity in recent years and the developing rapidly of urban transportation, and high-energy operation damage case increases.Fracture often shows as instability mode, the treatment difficulty, and complication rate is high.At present, many opinions adopt the internal fixation operation treatment, although the method for clinical treatment IFF is a lot, fixedly remain preferred option in traditional screw of power hip joint (DHS), it mainly is comprised of one piece of compression screw fixation and side steel plate with the sliding tray sleeve with sliding bar.From mechanics angle, screw of power hip joint can be kept preferably collodiaphyseal angle, and fixing damage is little, operating time is short, can implant with less wound, be a kind of better mode for the treatment of intertrochanteric fracture of the femur, also is to use clinically maximum internal fixation devices at present.Screw of power hip joint allows the fracture site dynamic pressurized, can stablize to greatest extent fixing fracture, effectively treat the generation of femur related complication, thereby screw of power hip joint becomes the goldstandard for the treatment of IFF.But because the anatomical features (cortex is thin, spongy bone is few) at tuberosity position, and fix self limitation (stress shielding problem) in the screw of power hip joint, do not solve the anaphase of bone fracture (3-4 is after week) because fracture end has the bone resorption about 2mm, make the lag screw play, cause the fracture end can not good involutory problem, especially instability mode intertrochanteric fracture, thus make the fracture delayed healing and can't reach desirable therapeutic effect and avoid common complication; For the more serious sufferers of osteoporosis face of fracture companion between the unstability femur, screw of power hip joint can not be controlled the excessive embedding of fracture end and press, make the nail tail excessively outstanding, also cause easily limb shortening and coxa vara, nail occuring when serious pass neck of femur, thereby makes the fracture delayed healing and can't reach desirable therapeutic effect and avoid common complication.
Summary of the invention
The present invention will provide a kind of involutory not good enough and interior fixing interior solid problem of fracture end that the interior fixedly later stage occurs that solves, a kind of elastic drive power hip screw is provided, it is simple in structure, easy to use, can promote the immediate union of fracturing, avoid the appearance of complication, improve the cure rate of intertrochanteric fracture of the femur.
The present invention is achieved in that
A kind of elastic drive power hip screw, it has a side steel plate that is made of sleeve and steel plate, steel plate is provided with the pressurization hole, the front portion is set with lag screw in sleeve, the tail nail is equipped with at the rear portion in sleeve, and described tail nail is threaded connection with the afterbody of lag screw, and its special character is: the inwall at sleeve is provided with shoulder, be placed with pressing spring between the nut of tail nail and the shoulder, the decrement of described pressing spring is 4～6mm.
Described steel plate is attenuate and narrowing down gradually from top to bottom, prevents steel plate place osteoporosis.
The pressurization hole that is positioned at the steel plate middle part is screw, to prevent the forcing screw play, to cause that taking off nail takes off plate, causes operative failure.
The inboard two edges of described steel plate longitudinally are provided with a plurality of notches, to reduce steel plate to the pressure of periosteum.
Described pressing spring external diameter and sleeve rear portion internal diameter match.
The present invention is simple in structure, easy to use, according to the flexible fastening principle traditional power hip screw (DHS) is improved, use this elastic drive power hip screw, stable and unstable intertrochanteric fracture of the femur are produced power slip effect after elastic fore is fixing, make fracture end under the effect of pressurization elastic component, an elastic fore effect be arranged all the time, the composition surface sclerotin is close contact all the time, guarantee has more compressive stress to conduct along sclerotin before the union of fracture always, and this pressurization distance is controlled in the 2-4mm scope all the time, so both guaranteed combining closely after the fracture end bone absorption, kept again simultaneously the stability of fracture fixation, fixing mortality in when greatly reducing patient's early loading avoids making operation complicated.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is A section enlarged drawing among Fig. 1;
Fig. 3 is the structural representation of Fig. 1 light plate (pressurization hole, middle part is screw).
Among the figure: side steel plate 1, sleeve 101, inner hexagonal hole 101a, shoulder 101b, circular hole 101c, notch 101d, pressurization hole 101e, pressurization hole 101e, steel plate 102, tail nail 2, pressing spring 3, lag screw 4, tapping screw thread 401.
The specific embodiment
Embodiment 1
As shown in Figure 1, the present invention has a side steel plate 1 that is made of sleeve 101 and steel plate 102, and steel plate 102 is provided with pressurization hole 101e, and sleeve 101 and steel plate 102 are integrated and described steel plate 102 bottoms attenuate and narrowing down gradually from top to bottom, to reduce stress shielding.Described steel plate 102 inboard two edges longitudinally are provided with a plurality of notch 101d.The front portion of described sleeve 101 is inner hexagonal hole 101a, the rear portion is circular hole 101c, be separated by by the shoulder 101b that is located on sleeve 101 inwalls therebetween, be set with lag screw 4 in sleeve 101 interior front portions, the front portion of described lag screw 4 is provided with tapping screw thread 401, the rear end is provided with the hollow screw, the postmedian of described lag screw 4 is the outer-hexagonal shape that is complementary with inner hexagonal hole 101a, tail nail 2 is housed at sleeve 101 interior rear portions, described tail nail 2 passes shoulder 101b and is threaded connection with the hollow screw of the afterbody of lag screw 4, between the nut of tail nail 2 and shoulder 101b, be placed with pressing spring 3, the circular hole 101c internal diameter at pressing spring 3 external diameters and sleeve 101 rear portions matches, and the decrement of described pressing spring 3 is 4～6cm.
The using method of this elastic drive power hip screw is as follows:
Conventional DHS internal fixation operation approach, finish lag screw 4 and side steel plate 1 fixing after, pressing spring 3 is placed in the sleeve 101, tighten tail nail 2 fixing by pressing spring 3 and anterior lag screw 4.
Under pressing spring 3 effects, an elastic fore effect is arranged all the time by the above fracture end that fixedly makes, and this pressurization distance is controlled in the 2-4mm scope all the time.So both guarantee combining closely behind the fracture end bone resorption, kept again the stability of fracture fixation simultaneously.
Embodiment 2
As shown in Figure 2, the pressurization hole 101e that is positioned at steel plate 102 middle parts is screw, the other the same as in Example 1.
Claims (5)
1. elastic drive power hip screw, it has a side steel plate that is made of sleeve and steel plate, steel plate is provided with the pressurization hole, the front portion is set with lag screw in sleeve, the tail nail is equipped with at the rear portion in sleeve, and described tail nail is threaded connection with the afterbody of lag screw, and it is characterized in that: the inwall at sleeve is provided with shoulder, be placed with pressing spring between the nut of tail nail and the shoulder, the decrement of described pressing spring is 4～6mm.
2. elastic drive power hip screw according to claim 1 is characterized in that: described steel plate is attenuate and narrowing down gradually from top to bottom.
3. elastic drive power hip screw according to claim 1 and 2 is characterized in that: the pressurization hole that is positioned at the steel plate middle part is screw.
4. elastic drive power hip screw according to claim 1 and 2 is characterized in that: the inboard two edges of described steel plate longitudinally are provided with a plurality of notches.
5. elastic drive power hip screw according to claim 1, it is characterized in that: described pressing spring external diameter and sleeve rear portion internal diameter match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104938089A CN103027739A (en) | 2012-11-28 | 2012-11-28 | Elastic dynamic hip screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104938089A CN103027739A (en) | 2012-11-28 | 2012-11-28 | Elastic dynamic hip screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103027739A true CN103027739A (en) | 2013-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104938089A Pending CN103027739A (en) | 2012-11-28 | 2012-11-28 | Elastic dynamic hip screw |
Country Status (1)
| Country | Link |
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| CN (1) | CN103027739A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106388923A (en) * | 2016-10-25 | 2017-02-15 | 上海市第六人民医院 | Controllable and slidable locking compression plate for femoral neck |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4621629A (en) * | 1985-08-12 | 1986-11-11 | Harrington Arthritis Research Center | Compression hip screw |
| EP0337288A1 (en) * | 1988-04-11 | 1989-10-18 | Egisto Armillei | Device for reducing and fixing fractures of the hip joint |
| CN2339168Y (en) * | 1997-09-04 | 1999-09-22 | 江西省遂川县人民医院 | Semi-plum-plossom shape bone-setting board |
| CN200998304Y (en) * | 2007-01-22 | 2008-01-02 | 王天旭 | Locking dynamic hip joint screw nail |
| CN202173467U (en) * | 2011-08-16 | 2012-03-28 | 吴建伟 | Dynamic hip screw |
| CN202288448U (en) * | 2011-10-19 | 2012-07-04 | 赵龙 | Improved anti-skidding bolt dynamic hip steel plate |
| CN202950735U (en) * | 2012-11-28 | 2013-05-29 | 曾祥一 | Elastic dynamic hip joint screw |
-
2012
- 2012-11-28 CN CN2012104938089A patent/CN103027739A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4621629A (en) * | 1985-08-12 | 1986-11-11 | Harrington Arthritis Research Center | Compression hip screw |
| EP0337288A1 (en) * | 1988-04-11 | 1989-10-18 | Egisto Armillei | Device for reducing and fixing fractures of the hip joint |
| CN2339168Y (en) * | 1997-09-04 | 1999-09-22 | 江西省遂川县人民医院 | Semi-plum-plossom shape bone-setting board |
| CN200998304Y (en) * | 2007-01-22 | 2008-01-02 | 王天旭 | Locking dynamic hip joint screw nail |
| CN202173467U (en) * | 2011-08-16 | 2012-03-28 | 吴建伟 | Dynamic hip screw |
| CN202288448U (en) * | 2011-10-19 | 2012-07-04 | 赵龙 | Improved anti-skidding bolt dynamic hip steel plate |
| CN202950735U (en) * | 2012-11-28 | 2013-05-29 | 曾祥一 | Elastic dynamic hip joint screw |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106388923A (en) * | 2016-10-25 | 2017-02-15 | 上海市第六人民医院 | Controllable and slidable locking compression plate for femoral neck |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130410 |