CN2508712Y - Medical medullary cavity internal locking intramedullary nail - Google Patents
Medical medullary cavity internal locking intramedullary nail Download PDFInfo
- Publication number
- CN2508712Y CN2508712Y CN 01258287 CN01258287U CN2508712Y CN 2508712 Y CN2508712 Y CN 2508712Y CN 01258287 CN01258287 CN 01258287 CN 01258287 U CN01258287 U CN 01258287U CN 2508712 Y CN2508712 Y CN 2508712Y
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- CN
- China
- Prior art keywords
- locking plate
- main shaft
- cast
- intramedullary nail
- utility
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- Expired - Fee Related
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Abstract
The utility model relates to a medical medullary cavity internal locking intramedullary nail which is used for curing the backbone fracture of the backbone of the long cannon bone for connecting and fixing in the orthopaedics. The utility model is characterized in that the upper and the lower ends of a pipe-shaped nail body with a radian are both opened with longitudinal holes which are provided with locking sheets arranged on a main shaft in the cavity of the pipe-shaped nail body. Compared with the prior art, the utility model not only can effectively control bending, torsion, cutting and rotating stress of the fracture end, but also can always cause and transfer the physiologic stress at the fracture end, thereby avoiding the stress cover, and reducing the complexity of the operation, and the utility model has the other advantages of convenient assembly and taking out.
Description
Technical field
This utility model has related to a kind of orthopaedics therapy long bone shaft fracture and has connected lock intramedullary nail in the pulp cavity with fixing usefulness.
Background technology
During the orthopaedics therapy long bone shaft fracture, use in steel plate screw or the medullary cavity on key surface usually and insert metal intramedullary nail.Connect and fixed purpose to reach fracture end.The more representative intramedullary pin of orthopaedics is standard intramedullary pin and intramedullary nail with lock at present, intramedullary nail with lock is to improve to form on the basis of standard intramedullary pin, be made up of cast nail body and upper and lower side pinning, it has enlarged the adaptability of intramedullary pin, has increased the stability of fracture fixation.Bend, turn round, cut the generation of revolving stress though solved fracture end, but the upper and lower side pinning all passes cortical bone, fracture end is produced stress shielding, influenced union of fracture, it is the same with traditional intramedullary pin simultaneously, the nail body only is adapted to the pulp cavity narrow merely and can not adapts to roomy portion, so can not keep fracture end in dissecting the position.Once more, pinning bears pressure, and the fracture of postoperative pinning is comparatively common.
Goal of the invention
The purpose of this utility model is that a kind of improved automatic pressurization that realizes will be provided, and can adapt to the irregular form of long bone medullary cavity, has the interior lock intramedullary nail of pulp cavity of lock function in the pulp cavity.Technical scheme
This utility model is achieved by the following technical solution: this utility model is made up of cast nail body and upper and lower end pinning, it is characterized in that the cast nail body upper/lower terminal position that has radian has the stringer hole, the stringer hole is provided with locking plate, and locking plate is installed in cast and follows closely on the endoceliac main shaft.
This utility model can also be fixed with two up-small and down-big hourglass heads respectively in described main shaft upper and lower end.Described locking plate is installed on the cervical region that cast is followed closely the hourglass head of endoceliac main shaft by a locking plate ring, and the locking plate ring can slide up and down along the cervical region short distance of hourglass head.Locking plate is selenodont, and a hook is arranged on it, and nested by the locking plate ring, and hook hole is 2/5 apart from last top, and distance top down is 3/5.Have catch ring and screw thread on the cast nail body near-end cavity wall, screw thread is connected with the screw thread of main shaft near-end.
This utility model compared with prior art has can adapt to roomy pulp cavity form of femur, increase the stability of fracture fixation, can significantly reduce the nonunion rate, can not only effectively control fracture end and bend, turn round, cut, revolve stress, and can make fracture end have physiological stress to produce and conduction all the time, thereby avoided stress shielding, reduced the complexity of operation, installed and take out advantages such as all more convenient.
Description of drawings
Fig. 1 is an overall structure sketch map of the present utility model.
Fig. 2 is a cast nail body structure sketch map of the present utility model.
Fig. 3 is that this utility model is fixed on the hourglass head structural representation on the main shaft.
Fig. 4 is a locking plate ring structure sketch map of the present utility model.
Fig. 5 is a locking plate structural representation of the present utility model.
Specific embodiments
Below in conjunction with description of drawings this utility model is described in further detail: as shown in Figure 1, this utility model is made of cast nail body 11, main shaft 4, the hourglass head 12 that has thin ball-type 5 and thick ball-type 8 and locking plate ring 6, locking plate 7 etc., in cast nail body 11 upper end inwalls screw thread 2 is arranged, there is catch ring 3 in the nail body lower end of screw thread 2 in cast nail body 11 inner chambers.Cast nail body 11 top ends have one to transfer to hole 1.As shown in Figure 2, the upper and lower end certain position of cast nail body 11 has stringer hole 13, so that locking plate 7 extended stringer holes 13.As shown in Figure 3, hard-wired hourglass head 12 is a calabash shape on main shaft 4, and two garden shape heads of hourglass head 12 are up-small and down-big, and the upper end is thin ball-type 5, and the lower end is group ball-type 8.Intermediate neck at hourglass head 12 has a groove 14, on can overlap a locking plate ring 6.As shown in Figure 4, locking plate ring 6 is a ring type, and the garden periphery has garden arc recess 15, so that locking plate 7 to be installed.As shown in Figure 5, locking plate 7 is selenodont, and a hook 16 is arranged on it, and nested by locking plate ring 6, and hook hole 17 is 2/5 apart from last top, and distance top down is 3/5.Locking plate 7 is installed on the cervical region of hourglass head 12 of the main shaft 4 of cast nail body 11 intracavity by a locking plate ring 6, locking plate ring 6 can slide up and down along the cervical region short distance of hourglass head 12.In conjunction with Fig. 1 work process of the present utility model is further described below: the upper and lower end certain position in the cast nail body 11 that has radian is opened stringer hole 13 again, and locking plate 7 is installed on the entrained locking plate ring 6 of the intracavity main shaft of cast nail body 11 by the hole, intracavity upper end, nail body upper end has catch ring 3 and screw thread 2, and screw thread 2 joins with main shaft 4 upper ends.When putting intramedullary pin behind the long bone pulp cavity, the clockwise direction main shaft 4 of upwards back-outing, then the hourglass head on the main shaft 4 12 drives locking plate rings 6 and locking plate 7 and moves to the upper end, and holds out against locking plate 7 by stringer hole 13, protrude in outside the cast nail body 11, thereby hold out against with the bone marrow inwall.Counterclockwise unscrew main shaft 4, the thin ball-type 5 of upper end hourglass head 12 then, it is loosening that the thick ball-type 8 of lower end hourglass head 12 drives locking plates 7, when main shaft 4 continuation were downward, the thin outside roof pressure locking plate 7 upper end outward flanges of ball-type outer rim contracted in the locking plate 7, and retraction cast nail body 11, be stuck in the stringer hole 13.The upper and lower end locking plate is opened the vertical face component with pulp cavity inwall sloped roof compaction forces outward, then fracture end is produced axial pressure, can promote the healing of fracturing.This utility model is changed in the marrow many places with nail one place's marrow internal fixation with lock and is fixed, preferably indication the scrambling of medullary cavity form, increased the stability of internal fixation, prevent intramedullary pin in pulp cavity get loose and fracture end between rotary moveable etc., can control effectively that fracture end is bent, turns round, revolved, shear stress, firmly fixed fracture, made fracture end have the generation and the conduction of physiological stress all the time; Secondly.Can continue in fracture end to impel union of fracture, shorten healing time, reduce the disunion rate of fracture with axial compressive force; Once more, this utility model is to lock by friction between nail body, locking plate and pulp cavity inwall, and pinning is integrated, does not need other boring, destroys cortical bone, has shortened operating time, has simplified the operation technique program; The 4th, locking plate is loaded on the lock ring, and lock ring then places between the thickness ball-type body of main shaft, locking plate open outward with in contract and controlled by main shaft, no locking plate comes off or stuck anxiety.
Claims (5)
1, lock intramedullary nail in a kind of medical pulp cavity is made up of cast nail body and upper and lower end pinning, it is characterized in that the cast nail body upper/lower terminal position that has radian has the stringer hole, and the stringer hole is provided with locking plate, and locking plate is installed in cast and follows closely on the endoceliac main shaft.
2, lock intramedullary nail in the medical pulp cavity according to claim 1 is characterized in that described main shaft upper and lower end is fixed with two up-small and down-big hourglass heads respectively.
3, lock intramedullary nail in the medical pulp cavity according to claim 2 is characterized in that described locking plate is installed on the cervical region that cast is followed closely the hourglass head of endoceliac main shaft by a locking plate ring, and the locking plate ring can slide up and down along the cervical region short distance of hourglass head.
4, lock intramedullary nail in the medical pulp cavity according to claim 3 is characterized in that described locking plate is selenodont, and a hook is arranged on it, and nested by the locking plate ring, and hook hole is apart from last top 2/5, and distance top down is 3/5.
5, lock intramedullary nail in the medical pulp cavity according to claim 1 is characterized in that having catch ring and screw thread on the cast nail body near-end intracavity, and screw thread is connected with the screw thread of main shaft near-end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01258287 CN2508712Y (en) | 2001-11-27 | 2001-11-27 | Medical medullary cavity internal locking intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01258287 CN2508712Y (en) | 2001-11-27 | 2001-11-27 | Medical medullary cavity internal locking intramedullary nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2508712Y true CN2508712Y (en) | 2002-09-04 |
Family
ID=33666890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01258287 Expired - Fee Related CN2508712Y (en) | 2001-11-27 | 2001-11-27 | Medical medullary cavity internal locking intramedullary nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2508712Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102525628A (en) * | 2012-01-04 | 2012-07-04 | 张建林 | Total internal locking type interlocking intramedullary nail |
| CN102551859A (en) * | 2012-01-04 | 2012-07-11 | 张建林 | Lock-containing intramedullary nail locked from inside to outside |
| CN103892898A (en) * | 2012-12-27 | 2014-07-02 | 比德尔曼技术有限责任两合公司 | Dynamic bone anchor |
-
2001
- 2001-11-27 CN CN 01258287 patent/CN2508712Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102525628A (en) * | 2012-01-04 | 2012-07-04 | 张建林 | Total internal locking type interlocking intramedullary nail |
| CN102551859A (en) * | 2012-01-04 | 2012-07-11 | 张建林 | Lock-containing intramedullary nail locked from inside to outside |
| CN102551859B (en) * | 2012-01-04 | 2014-02-05 | 张建林 | Lock-containing intramedullary nail locked from inside to outside |
| CN102525628B (en) * | 2012-01-04 | 2014-03-26 | 张建林 | Total internal locking type interlocking intramedullary nail |
| CN103892898A (en) * | 2012-12-27 | 2014-07-02 | 比德尔曼技术有限责任两合公司 | Dynamic bone anchor |
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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 |