CN102871720A - Memory pressurization hip lag screw system - Google Patents
Memory pressurization hip lag screw system Download PDFInfo
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- CN102871720A CN102871720A CN2012103984751A CN201210398475A CN102871720A CN 102871720 A CN102871720 A CN 102871720A CN 2012103984751 A CN2012103984751 A CN 2012103984751A CN 201210398475 A CN201210398475 A CN 201210398475A CN 102871720 A CN102871720 A CN 102871720A
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- lag screw
- hip lag
- memory
- pressurization
- pressurization hip
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Abstract
The invention belongs to the technical field of medical appliances and particularly relates to a memory pressurization hip lag screw system. The system comprises a memory pressurization hip lag screw, a hip lag screw sleeve and a lateral pressurization steel plate, wherein the memory pressurization hip lag screw is divided into a head part, a body part and a tail part, the front side of the head part is in a forky semicircular structure with screw threads, the side surface of the head part is in a spindle shape with screw threads and the head part forms an included angle being 135 to 150 degrees with the body part, the body part is in a hollow cylinder shape, and the tail part is in a cylinder shape provided with a hollow inner cavity and screw threads. The memory pressurization hip lag screw system can be used for old femur intertrochanteric fracture fixing, the rotation, pulling-out and cutting-out stress can be effectively resisted, the stability of the fracture end is enhanced, and the fracture healing is favorably realized. The memory pressurization hip lag screw system has the advantages that the operation is simple, the popularization is convenient, and the system can be implemented in any hospital.
Description
Technical field
The invention belongs to technical field of medical instruments, be specifically related to a kind of for hip, the nickel-titanium memory pressurization lag screw system that Procedure on Intertrochanteric Fracture in Aged is fixed.
Background technology
What be used for the treatment of at present intertrochanteric fracture of the femur is divided into marrow external fixation system and marrow internal fixation system.
The marrow external fixation system comprises Jewett steel plate, gusset, dynamic hip screw, dynamic condylar screw, Gorfried steel plate and near end of thighbone locking steel plate etc.Wherein most widely used is dynamic hip screw, is considered to treat the goldstandard of femoral intertrochanteric stable fracture.The marrow internal fixation system comprises Gamma nail, PFN and reconstruction nail etc.
Dynamic hip screw (dynamic hip screw, DHS) has pressurization and slip dual-use function, allows the compression of near-end comminuted fracture piece, and fracture end is drawn close automatically stablized, but early ambulant and heavy burden.Its major advantage is: screw fixation in femoral head is strong, and sliding mechanism can avoid the nail end to penetrate femoral head and acetabular bone in the sleeve.The pressure that bears a heavy burden is directly conducted to bone but not inside-fixture, keeps reduction of the fracture embedding tight, reduces disunion.Maximum shortcoming is: only have one piece of lag screw, anti-rotation, extract and cut out ability.Along with the increase of patient age, unstable fracture, osteoporosis etc. have significantly increased because of rotation, extracted and cut out the incidence rate that causes interior solid failure.
The marrow internal fixation system comprises Gamma nail, PFN and reconstruction nail etc.Marrow internal fixation system master nail is positioned at femoral bone cavitas medullaris, and than the more close heavy burden line of force of nail-plate class apparatus, thereby moment is shorter, and folding stress is less.Its distal locking nail can be used to prevent rotation and shortened deformity in addition.But it is higher that the fracture of shaft of femur of Gamma nail intra medullary nail far-end and neck screw pass capital complication.The danger that the healing of patient's intertrochanteric fracture is got except refracture behind the Gamma nail increases.PFN-1 only has 1 piece of anti-screw blade that revolves, anti-rotation, extract and cut out indifferent.PFN-2 and reconstruction nail all have 2 pieces of pulling force nails in femoral head neck, be arranged in parallel, and can produce slip, have anti-turning effort, can prevent that also the upper end screw from passing femoral head.But satisfaction is placed 2 pieces of no small screws of diameter and is not easy in narrow and small neck of femur, especially for the serious elderly patients of osteoporosis, does not allow the drift bolt that repeatedly resets, and has further increased operating difficulty.
Summary of the invention
The purpose of this invention is to provide a kind of fixedly Procedure on Intertrochanteric Fracture in Aged, can resist rotation, extract and cut out the memory pressurization hip lag screw system of stress, to overcome the limitation of existing DHS and PFNA, be beneficial to union of fracture.
The present invention adopts nickel Titanium shape memory alloy material, is made in the memory pressurization hip lag screw system of fracture fixation.Comprise memory pressurization hip lag screw, hip lag screw sleeve and side compression steel plate.Hip lag screw sleeve and side compression steel plate are without specific (special) requirements, and be identical with common DHS shape.Described memory pressurization hip lag screw comprises the head of the threaded front end bifurcated that connects successively, circular cylinder shape body and the threaded cylindrical tail portion of hollow cavity of hollow.At normal temperatures, memory pressurization hip lag screw head front is the threaded semicircular structure of bifurcated, and the side is threaded spindle, consists of 135 °～150 ° angle with body.Body is the cylindrical of hollow, and afterbody is that hollow cavity is threaded cylindrical.
The present invention in use, after intertrochanteric fracture of the femur resetted, at low temperatures the forked memory pressurization of tool hip lag screw top pull is become the plain screw shape first, to remember pressurization hip lag screw is screwed in the neck of femur again, tail end is inserted in the hip lag screw sleeve with the side compression steel plate, be screwed into the tail medicated cap and be press-fitted memory pressurization hip lag screw and side compression steel plate, os integumentale screw fixation side square steel plate, reply its original shape in the driving head portion of body temperature, can effectively resist rotation, extract and cut out stress, increase fracture end stability, be beneficial to union of fracture.
Description of drawings
Fig. 1 is that the present invention remembers pressurization hip lag screw system construction drawing.Wherein, left figure is front elevation, and right figure is side view.
Fig. 2 is that the present invention remembers the structure chart of pressurization hip lag screw under the room temperature state.Wherein, upper figure is front elevation, and figure below is side view.
Fig. 3 is that the present invention remembers pressurization hip lag screw be drawn into plain screw shape figure under low temperature state.Wherein, the left side is front elevation, and the right side is side view.
Fig. 4 is that the present invention remembers pressurization hip lag screw system for intertrochanteric fracture of the femur fixed model sketch map.
Number in the figure: 1 is the head of remembering the threaded front end bifurcated of the hip lag screw that pressurizes, and 2 is the circular cylinder shape body of remembering the hollow of the hip lag screw that pressurizes, and 3 is the threaded cylindrical tail portion of hollow cavity of remembering the hip lag screw that pressurizes; 4 are memory pressurization hip lag screw sleeve, and 5 is the side compression steel plate.The 6 threaded head front shape of front end bifurcated (under the room temperature) for memory pressurization hip lag screw, the 7 threaded head side views of front end bifurcated (under the room temperature) for memory pressurization hip lag screw, the 8 threaded head front shape of front end bifurcated (under the low temperature) for memory pressurization hip lag screw, the threaded head side view of front end bifurcated (under the low temperature) of 9 memory pressurization hip lag screws.
The specific embodiment
Now by reference to the accompanying drawings, the present invention is described in detail.The present invention remembers pressurization hip lag screw system and comprises memory pressurization hip lag screw, hip lag screw sleeve and side compression steel plate.Hip lag screw sleeve and side compression steel plate are without special, and be identical with common DHS shape.Memory pressurization hip lag screw comprises the head 1 of threaded front end bifurcated, circular cylinder shape body 2 and the threaded cylindrical tail portion 3 of hollow cavity of hollow.Native system material therefor entire body is Ultimum Ti.
During use, by existing Treatment of Intertrochanteric Fracture program, after the reduction of the fracture under the vastus lateralis ridge 2 ㎝ places squeeze into guide pin to the femoral head and cervix center, enlarge guide pin thigh lateral cortical bone hole on every side.The present invention is remembered pressurization hip lag screw place the sterilization frozen water, the threaded head 6,7 of its front end bifurcated is drawn into plain screw shape 8,9, be screwed into memory pressurization hip lag screw in along guide pin to neck of femur.The nail tail is inserted in the memory pressurization hip lag screw sleeve 4 with the side compression steel plate, makes side compression steel plate 5 be close to the thigh lateral cortical bone, is screwed into the tail medicated cap and is press-fitted memory pressurization hip lag screw and side compression steel plate.Os integumentale screw is the side compression steel plate fixedly.The present invention remembers pressurization hip lag screw and open gradually its original shape of recovery under the driving of body temperature, thereby effectively antagonism is rotated, extract and cut out stress.Increase fracture end stability, be beneficial to union of fracture.Select the memory pressurization hip lag screw of different length according to the length of neck of femur.
The present invention remembers the method for dismounting of pressurization hip lag screw system: by existing interior fixed routine, exposure side compression steel plate and the hip lag screw sleeve tail end got.The tail medicated cap of back-outing inserts the hollow guide pin along memory pressurization hip lag screw afterbody to head, injects the sterilization frozen water to head, and the head of memory pressurization hip lag screw bifurcated can be drawn into the plain screw shape gradually at low temperatures, and it is back-outed.The os integumentale screw of the fixation side of back-outing square steel plate is removed the hip lag screw sleeve with the side compression steel plate.
Embodiment 1 the present invention is used for Procedure on Intertrochanteric Fracture in Aged and fixes
The head of memory pressurization hip lag screw is forked, consists of 135 °～150 ° angles with body, and length is 20～30 ㎜, and stretching under the low temperature is the diameter of thread 12.5 ㎜ under the plain screw shape.Body is the cylindrical of hollow, length 30～50 ㎜, diameter 9 ㎜.Afterbody length is 10～20mm, and diameter 9 ㎜ are the cylinder of hollow, and are continuous with body, and intracavity is helicitic texture, is used for being screwed into fixedly tail medicated cap.After the reduction of the fracture the present invention sterilized in the frozen water, the threaded top pull of front end bifurcated is become the plain screw shape, be screwed into the present invention in along guide pin to neck of femur and remember pressurization hip lag screw.The present invention remembers pressurization hip lag screw will recover prong like gradually under body temperature drives, can effectively resist to revolve, extract and cut out turning stress.Increase fracture end stability, be beneficial to union of fracture.
Claims (6)
1. a memory pressurization hip lag screw system comprises memory pressurization hip lag screw, hip lag screw sleeve and side compression steel plate, and its material is Ultimum Ti; It is characterized in that: described memory pressurization hip lag screw comprises the head of the threaded front end bifurcated that connects successively, circular cylinder shape body and the threaded cylindrical tail portion of hollow cavity of hollow; Under the room temperature, memory pressurization hip lag screw head front is the threaded semicircular structure of bifurcated, and the side is threaded spindle, consists of 135 °～150 ° angle with body.
2. memory according to claim 1 pressurization hip lag screw system, it is characterized in that the head front of described memory pressurization hip lag screw is the threaded semicircular structure of bifurcated, the side is threaded spindle, consists of 135 °～150 ° angle with body.
3. memory according to claim 1 pressurization hip lag screw system is characterized in that the body of described memory pressurization hip lag screw is the cylindrical of hollow.
4. memory according to claim 1 pressurization hip lag screw system is characterized in that the afterbody of described memory pressurization hip lag screw is that hollow cavity is threaded cylindrical.
5. memory according to claim 1 pressurization hip lag screw system, it is characterized in that described memory pressurization hip lag screw, be under the low temperature state, its head can be drawn into the plain screw shape, can revert to threaded two semicircular structures of front end bifurcated under the driving of body temperature, each consists of 135 °～150 angles with body.
6. the using method of a memory as claimed in claim 1 pressurization hip lag screw system, after it is characterized in that intertrochanteric fracture of the femur resetted, at low temperatures the forked memory pressurization of tool hip lag screw top pull is become the plain screw shape first, to remember pressurization hip lag screw is screwed in the neck of femur again, tail end is inserted in the hip lag screw sleeve with the side compression steel plate, be screwed into the tail medicated cap and be press-fitted memory pressurization hip lag screw and side compression steel plate, os integumentale screw fixation side square steel plate, reply its original shape in the driving head portion of body temperature, thereby effectively antagonism rotation, extract and cut out stress, increase fracture end stability, be beneficial to union of fracture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103984751A CN102871720A (en) | 2012-10-19 | 2012-10-19 | Memory pressurization hip lag screw system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103984751A CN102871720A (en) | 2012-10-19 | 2012-10-19 | Memory pressurization hip lag screw system |
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| Publication Number | Publication Date |
|---|---|
| CN102871720A true CN102871720A (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103984751A Pending CN102871720A (en) | 2012-10-19 | 2012-10-19 | Memory pressurization hip lag screw system |
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| CN (1) | CN102871720A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107126250A (en) * | 2017-06-01 | 2017-09-05 | 成都贝施美医疗设备有限公司 | A kind of radial type near end of thighbone bindiny mechanism |
| CN111603234A (en) * | 2020-05-23 | 2020-09-01 | 徐州长风生物科技有限公司 | High-holding-force anti-back bone screw |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2621653A (en) * | 1949-04-29 | 1952-12-16 | Briggs Henry | Fracture reducing device |
| US3029811A (en) * | 1960-04-25 | 1962-04-17 | Ken Standard Corp | Surgical hip nail |
| US4612920A (en) * | 1984-11-06 | 1986-09-23 | Zimmer, Inc. | Compression hip screw |
| CN2098263U (en) * | 1991-05-28 | 1992-03-11 | 天津医院 | Marmem screw for curing femur or tibia fracture |
| CN201029924Y (en) * | 2007-04-30 | 2008-03-05 | 厉洪光 | Dynamic coxa nail-plate device with tail nail fixing mechanism |
| US20090281580A1 (en) * | 2006-07-05 | 2009-11-12 | Implants International Lmited | Bone screw |
-
2012
- 2012-10-19 CN CN2012103984751A patent/CN102871720A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2621653A (en) * | 1949-04-29 | 1952-12-16 | Briggs Henry | Fracture reducing device |
| US3029811A (en) * | 1960-04-25 | 1962-04-17 | Ken Standard Corp | Surgical hip nail |
| US4612920A (en) * | 1984-11-06 | 1986-09-23 | Zimmer, Inc. | Compression hip screw |
| CN2098263U (en) * | 1991-05-28 | 1992-03-11 | 天津医院 | Marmem screw for curing femur or tibia fracture |
| US20090281580A1 (en) * | 2006-07-05 | 2009-11-12 | Implants International Lmited | Bone screw |
| CN201029924Y (en) * | 2007-04-30 | 2008-03-05 | 厉洪光 | Dynamic coxa nail-plate device with tail nail fixing mechanism |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107126250A (en) * | 2017-06-01 | 2017-09-05 | 成都贝施美医疗设备有限公司 | A kind of radial type near end of thighbone bindiny mechanism |
| CN111603234A (en) * | 2020-05-23 | 2020-09-01 | 徐州长风生物科技有限公司 | High-holding-force anti-back bone screw |
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Application publication date: 20130116 |