CN202086564U - Primary and secondary combined screw - Google Patents
Primary and secondary combined screw Download PDFInfo
- Publication number
- CN202086564U CN202086564U CN2011201097858U CN201120109785U CN202086564U CN 202086564 U CN202086564 U CN 202086564U CN 2011201097858 U CN2011201097858 U CN 2011201097858U CN 201120109785 U CN201120109785 U CN 201120109785U CN 202086564 U CN202086564 U CN 202086564U
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- screw
- primary
- sub
- female
- female screw
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- Expired - Fee Related
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Abstract
The utility model discloses a primary and secondary combined screw, which comprises a hollow primary screw body (1) and a secondary screw body (2). Threads are disposed on both the inner side and the outer side of the primary screw (1), the secondary screw (2) can be screwed into the primary screw (1) and is inserted into the primary screw (1), the direction of threads of the secondary screw (2) is identical to that of the external threads of the primary screw (1), and the primary screw (1) and the secondary screw (2) are made of stainless steel or titanium alloy. The primary and secondary combined screw has the advantages that the primary and secondary combined screw is high in fixation strength, low in interference to bone scale and not easy to cause cracking of fracture fragment, and backing out of the primary and secondary combined screw is avoided.
Description
Technical field
This utility model relates to a kind of Screw for the treatment of fracture.
Background technology
Often run into the avulsion fracture of related ligament or joint capsule and the fracture around the bone in children dirt clinically.The avulsion fracture characteristics: sclerite is little, and is thin, and subsidiary have vital tissues such as joint capsule or ligament, and pulling force is big, and the easy explosion of sclerite fixedly the time, fixing difficulty.Bone in children dirt surrounding fracture characteristics: fracture end is close or involve the bone dirt, and thick inside-fixture rapid wear injury of the bone dirt causes anormogenesis.At present, treat clinically avulsion fracture and bone in children the dirt surrounding fracture inside-fixture commonly used have: screw, Kirschner wire and steel wire etc.Yet plain screw is bigger because of its diameter, easily causes the sclerite explosion and fixing failure when fixing avulsion fracture; When bone fixation dirt surrounding fracture, rapid wear injury of the bone dirt causes local bone dirt abnormal development.The fixing above two kinds of fracture of Kirschner wire often cause fixing failure, the Kirschner wire tail end that withdraws to stimulate local soft tissue even sting out skin causing infection outward because of its easy withdraw of the needle and constant intensity are low.Steel wire often is shifted because of constant intensity causes fracture end inadequately again.Split cruelly in order to overcome existing inside-fixture easy damaged or to cause sclerite, constant intensity is low, withdraws from, and stimulates soft tissue and causes problems such as infection and pain, is necessary to seek a kind of novel fixture.
Summary of the invention
At the shortcoming of the screw of existing treatment fracture, this utility model provides a kind of novel Screw.
To achieve these goals, the measure taked of this utility model:
A kind of Screw, described Screw comprise all threaded female screw in the interior outside of hollow and can be screwed into the sub-screw of female screw that sub-screw is inserted in female screw;
The tail end of described female screw is provided with and can makes things convenient for female nail to insert the interior interior hexagonal groove of bone;
The external screw thread direction of the screw thread of described sub-screw and female screw is consistent;
The material of described female screw and sub-screw can absorb plastics or magnesium alloy absorbable metal for poly-Acetic acid, hydroxy-, bimol. cyclic ester, polylactide, polyamide, poly-dioxanes, self-reinforcing polylactic acid;
The material of described female screw and sub-screw is the poly-Acetic acid, hydroxy-, bimol. cyclic ester of self-reinforcing.
The beneficial effects of the utility model: constant intensity is big, does not move back nail, and bone dirt is disturbed little and is difficult for causing the sclerite explosion, is beneficial to and applies.
Description of drawings
Fig. 1, structural representation of the present utility model;
Fig. 2, the vertical view of Fig. 1;
Fig. 3, the profile of female screw.
The specific embodiment
A kind of Screw, described Screw comprise all threaded female screw 1 in the interior outside of hollow and can be screwed into the sub-screw 2 of female screw 1 that sub-screw 2 is inserted in female screw 1.During use, at first reseting fracture is used the Kirschner wire boring close with sub-screw diameter, as the telltale mark that screw is screwed into, extracts Kirschner wire; Remove little sclerite and be screwed into sub-screw 2 in its locating hole, the insertion Kirschner wire in the locating hole of fracture groove is screwed into female screw 1 to its afterbody and imbeds below the fracture rooved face as guide pin, extract Kirschner wire; The sub-screw 2 that has little sclerite is screwed in female screw 1.Can be used the pad of various patterns with further increase constant intensity at sub-screw 2 tail ends.In Fig. 2, hexagonal groove can make things convenient for female nail 1 to insert in the bone in the tail end of female screw has.Sub-screw 2 is screwed in the female screw female thread that matches, and the external screw thread direction of the screw thread of sub-screw and female screw is consistent, so female nail can not become flexible when being screwed into the son nail.The material selection rustless steel of described female screw 1 and sub-screw 2 or titanium alloy gather Acetic acid, hydroxy-, bimol. cyclic ester (polyglycolic acid, P GA), polylactide (polylactic acid, PLA), polyamide, poly-Acetic acid, hydroxy-, bimol. cyclic ester (SR-P GA) of poly-dioxanes and self-reinforcing and self-reinforcing PLA (SR-PLLA) etc. can absorb plastics, reach absorbable metal such as magnesium alloy etc.The beneficial effects of the utility model: constant intensity is big, does not move back nail, and bone dirt is disturbed little and is difficult for causing the sclerite explosion.
Those skilled in the art's simple change and replacement all are within the protection domain of the present utility model in this area.
Claims (5)
1. a Screw is characterized in that, described Screw comprises all threaded female screw in the interior outside of hollow (1) and can be screwed into the sub-screw (2) of female screw (1) that sub-screw (2) is inserted in female screw (1).
2. Screw according to claim 1 is characterized in that, the tail end of described female screw (1) is provided with and can makes things convenient for female nail (1) to insert the interior interior hexagonal groove of bone.
3. Screw according to claim 1 and 2 is characterized in that, the screw thread of described sub-screw (2) is consistent with the external screw thread direction of female screw (1).
4. Screw according to claim 3 is characterized in that, the material of described female screw (1) and sub-screw (2) can absorb plastics or magnesium alloy absorbable metal for poly-Acetic acid, hydroxy-, bimol. cyclic ester, polylactide, polyamide, poly-dioxanes, self-reinforcing polylactic acid.
5. Screw according to claim 4 is characterized in that, the material of described female screw (1) and sub-screw (2) is the poly-Acetic acid, hydroxy-, bimol. cyclic ester of self-reinforcing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201097858U CN202086564U (en) | 2010-11-24 | 2011-03-30 | Primary and secondary combined screw |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020632803.6 | 2010-11-24 | ||
| CN201020632803 | 2010-11-24 | ||
| CN2011201097858U CN202086564U (en) | 2010-11-24 | 2011-03-30 | Primary and secondary combined screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202086564U true CN202086564U (en) | 2011-12-28 |
Family
ID=45361665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201097858U Expired - Fee Related CN202086564U (en) | 2010-11-24 | 2011-03-30 | Primary and secondary combined screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202086564U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836000A (en) * | 2012-08-17 | 2012-12-26 | 苏州瑞华医院有限公司 | Novel toothed screw pad assembly for cure of avulsion fracture |
| CN103263697A (en) * | 2013-06-08 | 2013-08-28 | 吉林金源北方科技发展有限公司 | All-biological controllable and degradable bone nail and using method thereof |
-
2011
- 2011-03-30 CN CN2011201097858U patent/CN202086564U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836000A (en) * | 2012-08-17 | 2012-12-26 | 苏州瑞华医院有限公司 | Novel toothed screw pad assembly for cure of avulsion fracture |
| CN102836000B (en) * | 2012-08-17 | 2013-08-21 | 苏州瑞华医院有限公司 | Novel toothed screw pad assembly for cure of avulsion fracture |
| CN103263697A (en) * | 2013-06-08 | 2013-08-28 | 吉林金源北方科技发展有限公司 | All-biological controllable and degradable bone nail and using method thereof |
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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: 20111228 Termination date: 20160330 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |