CN204049823U - With the locking bone screw of expansion structure - Google Patents
With the locking bone screw of expansion structure Download PDFInfo
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- CN204049823U CN204049823U CN201420501522.5U CN201420501522U CN204049823U CN 204049823 U CN204049823 U CN 204049823U CN 201420501522 U CN201420501522 U CN 201420501522U CN 204049823 U CN204049823 U CN 204049823U
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- expandable nail
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- blind hole
- nail bar
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Abstract
With a locking bone screw for expansion structure, belong to technical field of medical instruments.It is characterized in that it comprises expandable nail bar processed, follows closely with the top matched, female thread is shaped with in the blind hole of expandable nail bar or through hole, top nail is shaped with the external screw thread be meshed with female thread in the blind hole of expandable nail bar or through hole, expandable nail club head is shaped with one or more expansion slot, and top nail afterbody is shaped with groove in the blind hole or through hole that top nail can be screwed in expandable nail bar or polygonal blind hole or polygon protruding head; Expandable nail bar afterbody is shaped with the external screw thread of the tapering screwed in knochenbruch, and tail end face is shaped with the groove screwed in knochenbruch of tapering.This utility model can increase the frictional force of bone screw and spongy bone, strengthens the resisting pull out forces to skeleton, and screw is firmly connected with cortical bone and spongy bone; Screw-in simple to operation in operation, easy and taking-up.
Description
Technical field
This utility model belongs to technical field of medical instruments, is specifically related to a kind of locking bone screw with expansion structure.
Background technology
Skeleton is made up of cortical bone, spongy bone and bone marrow from outside to inside.Cortical bone feature: harder, Thickness Ratio is more broad; Spongy bone feature: more loose, Thickness Ratio is thicker.Fracture is clinical modal case, and Therapeutic Method adopts the Therapeutic Method of common internal fixtion, namely usually adopt bone screw and locking steel plate fixing with the use of knochenbruch is taken back.And existing bone screw is be connected with between cortical bone and spongy bone by screw thread on screw entirely, as publication number: 102458285A " bone screw "; Publication number: 103126761A " bone screw "; Notification number: the technical scheme that " bone screw " etc. are described.And screw thread is connected with between cortical bone and spongy bone and there is following disadvantage on screw: one is because of skeleton compositing characteristic, once screw thread and cortical bone Joint failure on screw, screw loosening is easily caused even to depart from steel plate, thus the consequence of nonunion or delayed union or malunion or second operation can be produced, this has a strong impact on patient's post-operative recovery, adds the misery of patient.Two is that its screw thread of existing bone screw is long more also can only be screwed in by doctor by hand, not only time-consuming, and causes damage easily in screw screw-in process cortical bone and spongy bone.
Summary of the invention
The purpose of this utility model is that the disadvantage existed for existing bone screw provides a kind of locking bone screw with expansion structure, and it can be connected and fixed with the cortical bone of skeleton and spongy bone well; And can effectively be fixedly connected equally when there being other implants; And being also shaped with external screw thread at the basic screwing cylindrical outer wall of above-mentioned band expansion structure, then its cortical bone with skeleton and spongy bone are connected more firm.
This utility model is achieved through the following technical solutions, a kind of locking bone screw with expansion structure, its main points are that it comprises the expandable nail bar being shaped with blind hole or cone-headed through hole, the top matched with blind hole or the through hole of expandable nail bar is followed closely, female thread is shaped with in the blind hole of expandable nail bar or through hole, top nail is shaped with the external screw thread be meshed with female thread in the blind hole of expandable nail bar or through hole, expandable nail club head is shaped with one or more expansion slot can opened by top nail head support after the blind hole or through hole screwing in expandable nail bar is followed closely on top, top nail afterbody is shaped with groove in the blind hole or through hole that top nail can be screwed in expandable nail bar or polygonal blind hole or polygon protruding head, expandable nail bar afterbody is shaped with the external screw thread of the tapering screwed in knochenbruch, and tail end face is shaped with the groove screwed in knochenbruch of tapering.
As preferably, coning, one or more described expansion slot is two expansion slots of across to described expandable nail club head.
As preferably, being shaped with female thread in the blind hole of described expandable nail bar or through hole is be shaped with female thread in the blind hole of expandable nail bar or through-hole tail, and on top, nail afterbody is shaped with the external screw thread engaged with the blind hole of expandable nail bar or through-hole tail female thread.
As preferably, described top nail head coning.
As preferably, described its cylindrical outer wall of expandable nail bar is also shaped with external screw thread.
Use of the present utility model operation is as follows: first punch at the micro-shape electric drill of fracture site, then in this hole, load onto expandable nail bar, and the groove of its tail end face of turn, screws in knochenbruch by its tapering; Again by push up bind expandable nail bar blind hole or through hole in, and the groove of its afterbody of turn or polygonal blind hole or polygon protruding head, what top was followed closely screws in the female thread of expandable nail bar, now push up the expansion slot that nail head meeting support holds expandable nail club head, thus the locking bone screw of band expansion structure is pricked securely in knochenbruch.As the fracture site of the locking bone screw of band expansion structure from healing taken out, only need contrary operation.As its cylindrical outer wall of expandable nail bar is also shaped with external screw thread, then first by hand expandable nail bar is screwed in knochenbruch, again by push up bind expandable nail bar blind hole or through hole in, and the groove of its afterbody of turn or polygonal blind hole or polygon protruding head, what top was followed closely screws in the female thread of expandable nail bar, now nail head meeting support holds the expansion slot of expandable nail club head, thus makes the locking bone screw of band expansion structure prick more firmly in knochenbruch.
From showing structure of the present utility model and use operation description above, locking bone screw with expansion structure can overcome the disadvantage that existing bone screw exists completely, increase the frictional force of bone screw and spongy bone, strengthen the resisting pull out forces to skeleton, prevent screw from exiting cortical bone, thus reduce the situation producing nonunion or delayed union or malunion or need second operation, recover healing for fracture and ligament repair brings better guarantee.In addition, it is scientific and reasonable for structure, simple to operation in operation, safety, easily screws in, easily takes out.Further, its cost is suitable with existing bone screw.
Accompanying drawing explanation
Fig. 1: the broken section structural representation of this utility model embodiment one
The left view of Fig. 2: Fig. 1
The right view of Fig. 3: Fig. 1
Fig. 4: execute example one load knochenbruch after using state figure
In Fig. 1-4,1-blind hole, 2-expandable nail bar, 3-pushes up nail, 4-female thread, 5-external screw thread, 6-expansion slot, 7-external screw thread, 8-knochenbruch, 9-groove, 10-groove
Fig. 5: this utility model embodiment two broken section structural representation
The left view of Fig. 6: Fig. 1
The right view of Fig. 7: Fig. 1
Fig. 8: execute example two load knochenbruch after using state figure
In Fig. 5-8,11-blind hole, 12-expandable nail bar, 13-pushes up nail, 14-female thread, 15-external screw thread, 16-expansion slot, 17-external screw thread, 18-knochenbruch, 19-groove, 20-groove, 21-external screw thread
Detailed description of the invention
Just Fig. 1-4, represented two embodiments in Fig. 5-8 are further described this utility model below:
Embodiment one
It comprises the expandable nail bar 2 being shaped with blind hole 1, the top matched with the blind hole 1 of expandable nail bar 2 follow closely 3, and blind hole 1 afterbody of expandable nail bar 2 is shaped with female thread 4, pushes up nail 3 afterbody and is shaped with the external screw thread 5 be meshed with the blind hole 1 afterbody female thread 4 of expandable nail bar 2; Expandable nail bar 2 head coning, and be shaped with two expansion slots 6 of the across can opened by top nail 3 head support after top nail 3 screws in the blind hole 1 of expandable nail bar 2, expandable nail bar 2 afterbody is shaped with the external screw thread 7 of the tapering screwed in knochenbruch 8, and tail end face is shaped with the criss-cross groove 9 screwed in by the external screw thread 7 of tapering in knochenbruch 8; Coning, top nail 3 afterbody is shaped with the criss-cross groove 10 that top nail 3 can be screwed in the blind hole 1 of expandable nail bar 2 to top nail 3 head.
Embodiment two
It comprises the expandable nail bar 12 being shaped with blind hole 11, the top matched with the blind hole 11 of expandable nail bar 12 follows closely 13, blind hole 11 afterbody of expandable nail bar 12 is shaped with female thread 14, and top nail 13 afterbody is shaped with the external screw thread 15 be meshed with the blind hole 11 afterbody female thread 14 of expandable nail bar 12; Expandable nail bar 12
Head coning, and be shaped with two expansion slots 16 of the across can opened by top nail 13 head support after top nail 13 screws in the blind hole 11 of expandable nail bar 12, expandable nail bar 12 is shaped with and is screwed in the external screw thread 17 of afterbody tapering in knochenbruch 18 and the external screw thread 21 of cylindrical outer wall, and tail end face is shaped with the criss-cross groove 19 screwed in knochenbruch 8; Coning, top nail 13 afterbody is shaped with the criss-cross groove 20 that blind hole 11 support that top nail 13 can be screwed in expandable nail bar 12 is split into criss-cross two expansion slots 16 to top nail 13 head.
Claims (10)
1. the locking bone screw with expansion structure, it is characterized in that it comprises the expandable nail bar being shaped with blind hole or cone-headed through hole, the top matched with blind hole or the through hole of expandable nail bar is followed closely, female thread is shaped with in the blind hole of expandable nail bar or through hole, top nail is shaped with the external screw thread be meshed with female thread in the blind hole of expandable nail bar or through hole, expandable nail club head is shaped with one or more expansion slot can opened by top nail head support after the blind hole or through hole screwing in expandable nail bar is followed closely on top, top nail afterbody is shaped with groove in the blind hole or through hole that top nail can be screwed in expandable nail bar or polygonal blind hole or polygon protruding head, expandable nail bar afterbody is shaped with the external screw thread of the tapering screwed in knochenbruch, and tail end face is shaped with the groove screwed in knochenbruch of tapering.
2. the locking bone screw of band expansion structure according to claim 1, is characterized in that described expandable nail club head coning, and one or more described expansion slot is two expansion slots of across.
3. the locking bone screw of band expansion structure according to claim 1 and 2, it is characterized in that being shaped with in the blind hole of described expandable nail bar or through hole female thread is be shaped with female thread in the blind hole of expandable nail bar or through-hole tail, and on top, nail afterbody is shaped with the external screw thread engaged with the blind hole of expandable nail bar or through-hole tail female thread.
4. the locking bone screw of band expansion structure according to claim 1 and 2, is characterized in that described top nail head coning.
5. the locking bone screw of band expansion structure according to claim 3, is characterized in that described top nail head coning.
6. the locking bone screw of band expansion structure according to claim 1 and 2, is characterized in that described its cylindrical outer wall of expandable nail bar is also shaped with external screw thread.
7. the locking bone screw of band expansion structure according to claim 3, is characterized in that described its cylindrical outer wall of expandable nail bar is also shaped with external screw thread.
8. the locking bone screw of band expansion structure according to claim 3, is characterized in that described its cylindrical outer wall of expandable nail bar is also shaped with external screw thread.
9. the locking bone screw of band expansion structure according to claim 4, is characterized in that described its cylindrical outer wall of expandable nail bar is also shaped with external screw thread.
10. the locking bone screw of band expansion structure according to claim 5, is characterized in that described its cylindrical outer wall of expandable nail bar is also shaped with external screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420501522.5U CN204049823U (en) | 2014-09-02 | 2014-09-02 | With the locking bone screw of expansion structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420501522.5U CN204049823U (en) | 2014-09-02 | 2014-09-02 | With the locking bone screw of expansion structure |
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| Publication Number | Publication Date |
|---|---|
| CN204049823U true CN204049823U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420501522.5U Active CN204049823U (en) | 2014-09-02 | 2014-09-02 | With the locking bone screw of expansion structure |
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| Country | Link |
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| CN (1) | CN204049823U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104224302A (en) * | 2014-09-02 | 2014-12-24 | 浙江科惠医疗器械有限公司 | Locking bone screw with expansionstructure |
| CN107374717A (en) * | 2017-08-11 | 2017-11-24 | 山东威高骨科材料股份有限公司 | A kind of barb-type swell fixture for injecting bone cement |
| CN112155701A (en) * | 2020-10-10 | 2021-01-01 | 江山市人民医院 | Adjustable screw for calcaneus |
| KR20210155134A (en) * | 2020-06-15 | 2021-12-22 | 충남대학교산학협력단 | Cortical screw reinforcement structure for bone fixation, cortical screw module having the same, inserting method of cortical screw module |
-
2014
- 2014-09-02 CN CN201420501522.5U patent/CN204049823U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104224302A (en) * | 2014-09-02 | 2014-12-24 | 浙江科惠医疗器械有限公司 | Locking bone screw with expansionstructure |
| CN107374717A (en) * | 2017-08-11 | 2017-11-24 | 山东威高骨科材料股份有限公司 | A kind of barb-type swell fixture for injecting bone cement |
| KR20210155134A (en) * | 2020-06-15 | 2021-12-22 | 충남대학교산학협력단 | Cortical screw reinforcement structure for bone fixation, cortical screw module having the same, inserting method of cortical screw module |
| KR102492061B1 (en) * | 2020-06-15 | 2023-01-25 | 충남대학교산학협력단 | Cortical screw reinforcement structure for bone fixation, cortical screw module having the same, inserting method of cortical screw module |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG CANWELL MEDICAL CO., LTD. Free format text: FORMER NAME: KEHUI MEDICAL EQUIPMENT CO., LTD., ZHEJIANG |
|
| CP03 | Change of name, title or address |
Address after: 321016 Zhejiang Province, Jinhua city Wucheng District Xianghua Street No. 466 Patentee after: Zhejiang Ke Hui Medical Treatment Equipment Co., Ltd Address before: 321016 Zhejiang city in Jinhua Province, Xinhua Street No. 466 Patentee before: Zhejiang Canwell Medical Co., Ltd. |