CN204744372U - Take locking pedicle of vertebral arch screw that takes off of memory alloy core - Google Patents
Take locking pedicle of vertebral arch screw that takes off of memory alloy core Download PDFInfo
- Publication number
- CN204744372U CN204744372U CN201520476923.4U CN201520476923U CN204744372U CN 204744372 U CN204744372 U CN 204744372U CN 201520476923 U CN201520476923 U CN 201520476923U CN 204744372 U CN204744372 U CN 204744372U
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- rod
- tail end
- hole
- memory alloy
- core
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Abstract
The utility model discloses a take locking pedicle of vertebral arch screw that takes off of memory alloy core, including the core of following closely the body and making by memory alloy, follow closely the internal screw thread through -hole that is provided with, the core includes the body of rod and sets up two platellites at body of rod head end, the inside hexagonal hole that is provided with of body of rod tail end, body of rod tail end still be provided with with screw thread through -hole complex external screw thread, be hook -likely behind the platellite recovering shape memory. The take locking pedicle of vertebral arch screw that takes off of memory alloy core of this structure, not only convenient to use in the use, can avoid not hard up moreover, has guaranteed fixed effect.
Description
Technical field
This utility model relates to medical instruments field, is specifically related to a kind of anti-loose pedicle screw with memorial alloy core body.
Background technology
Along with Chinese population senescence, the gerontal case of the fracture dislocation that wound causes and lumbar spondylolisthesis gets more and more, and many gerontal patients need operative treatment.Because of osteoporosis, traditional pedicle screw is fixing insecure after settling, and easily occurs that screw is extracted loosening, causes fixation failure, operative failure in reseting procedure.In addition, use the fixing some patients of conventional pedicle screws to need row overhaul technology because of the state of an illness, then will take out former screw and again settle pedicle screw, because of the destruction in Yuan Ding road, inadequate to pedicle screw hold, equally easily cause fixation failure.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of anti-loose pedicle screw with memorial alloy core body, not only easy to use, and in use, can avoid loosening, and ensures fixed effect.
This utility model is solved the problem by following technological means: a kind of anti-loose pedicle screw with memorial alloy core body, the core body comprising rivet nut and be made up of memorial alloy, tapped through hole is provided with in described rivet nut, described core body comprises the body of rod and is arranged on two pieces of plates of body of rod head end, described body of rod tail end inside is provided with hexagon ring, body of rod tail end is also provided with the external screw thread coordinated with tapped through hole, and described plates are hook-shaped after recovering shape memory.
Further, the screwed hole extended vertically is provided with in the described body of rod, the body of rod comprises the body of rod and the lower body of rod, described upper body of rod tail end inside is provided with hexagon ring, upper body of rod tail end is also provided with the external screw thread coordinated with tapped through hole, upper body of rod head end and described lower body of rod tail end are socketed, lower body of rod head end is provided with two pieces of plates, described screwed hole tail end is communicated with hexagon ring, screwed hole head end extends in the lower body of rod, and the described upper body of rod is undertaken being connected locking by the lock-screw be screwed in screwed hole with the lower body of rod.
Further, described core body is made up of ti-ni shape memory alloy.
The beneficial effects of the utility model: the anti-loose pedicle screw of band memorial alloy core body of the present utility model, the core body comprising rivet nut and be made up of memorial alloy, tapped through hole is provided with in described rivet nut, described core body comprises the body of rod and is arranged on two pieces of plates of body of rod head end, described body of rod tail end inside is provided with hexagon ring, body of rod tail end is also provided with the external screw thread coordinated with tapped through hole, and described plates are hook-shaped after recovering shape memory.The anti-loose pedicle screw of the band memorial alloy core body of this structure, not only easy to use, and in use, can avoid loosening, ensure that fixed effect.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, this utility model is further described.
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below with reference to accompanying drawing, this utility model is described in detail, as shown in Figure 1: a kind of anti-loose pedicle screw with memorial alloy core body, the core body comprising rivet nut 1 and be made up of memorial alloy, described memorial alloy is ti-ni shape memory alloy, tapped through hole 3 is provided with in described rivet nut, described core body comprises the body of rod and is arranged on two pieces of plates 22 of body of rod head end, described two pieces of plates are oppositely arranged, described body of rod tail end inside is provided with hexagon ring 5, body of rod tail end is also provided with the external screw thread coordinated with tapped through hole, described plates are hook-shaped after recovering shape memory.When using this screw, first rivet nut is inserted vertebral body by pedicle of vertebral arch, (now two pieces of plates in the form of sheets subsequently at low ambient temperatures, do not recover shape memory, be convenient to walk in tapped through hole), by the inner hexagon spanner mated with hexagon ring, progressively core body is screwed in tapped through hole, expose outside rivet nut until two pieces of plates complete.Along with the rising of temperature, two pieces of plates recover shape memory, become hook-shaped, snap in vertebral cancellous bone, can avoid loosening, ensure that the fixed effect of this pedicle screw.In addition, rivet nut and core body all can be screwed in patient body by spanner, easy to use.
As the further improvement of technique scheme, the screwed hole 4 extended vertically is provided with in the described body of rod, the body of rod comprises the body of rod 211 and the lower body of rod 212, described upper body of rod tail end inside is provided with hexagon ring, upper body of rod tail end is also provided with the external screw thread coordinated with tapped through hole, upper body of rod head end and described lower body of rod tail end are socketed, lower body of rod head end is provided with two pieces of plates, described screwed hole tail end is communicated with hexagon ring, screwed hole head end extends in the lower body of rod, and the described upper body of rod is undertaken being connected locking by the lock-screw 6 be screwed in screwed hole with the lower body of rod.When pathological changes is recovered to need to exit this screw, screwdriver is inserted by the hexagon ring of tail end, unclamp lock-screw, the body of rod can be separated with the lower body of rod, rivet nut exits together with the upper body of rod subsequently, the lower body of rod and plates are by nail road (described nail road is the passage of inserting rivet nut) refrigeration, use apparatus to enter nail road and clamp the lower body of rod, because of plates deliquescing at reduced temperature, contract next time in external force, exit together with the lower body of rod, be convenient to operation like this and remove this screw, further increase the convenience that this screw uses.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail this utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (3)
1. the anti-loose pedicle screw with memorial alloy core body, it is characterized in that: the core body comprising rivet nut (1) and be made up of memorial alloy, tapped through hole (3) is provided with in described rivet nut, described core body comprises the body of rod and is arranged on two pieces of plates (22) of body of rod head end, described body of rod tail end inside is provided with hexagon ring (5), body of rod tail end is also provided with the external screw thread coordinated with tapped through hole, and described plates are hook-shaped after recovering shape memory.
2. the anti-loose pedicle screw of band memorial alloy core body according to claim 1, it is characterized in that: in the described body of rod, be provided with the screwed hole (4) extended vertically, the body of rod comprises the body of rod (211) and the lower body of rod (212), described upper body of rod tail end inside is provided with hexagon ring, upper body of rod tail end is also provided with the external screw thread coordinated with tapped through hole, upper body of rod head end and described lower body of rod tail end are socketed, lower body of rod head end is provided with two pieces of plates, described screwed hole tail end is communicated with hexagon ring, screwed hole head end extends in the lower body of rod, the described upper body of rod is undertaken being connected locking by the lock-screw (6) be screwed in screwed hole with the lower body of rod.
3. the anti-loose pedicle screw of the band memorial alloy core body according to claim 1-2 any one, is characterized in that: described core body is made up of ti-ni shape memory alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520476923.4U CN204744372U (en) | 2015-07-03 | 2015-07-03 | Take locking pedicle of vertebral arch screw that takes off of memory alloy core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520476923.4U CN204744372U (en) | 2015-07-03 | 2015-07-03 | Take locking pedicle of vertebral arch screw that takes off of memory alloy core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204744372U true CN204744372U (en) | 2015-11-11 |
Family
ID=54459137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520476923.4U Expired - Fee Related CN204744372U (en) | 2015-07-03 | 2015-07-03 | Take locking pedicle of vertebral arch screw that takes off of memory alloy core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204744372U (en) |
-
2015
- 2015-07-03 CN CN201520476923.4U patent/CN204744372U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20160703 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |