CN205988317U - Intramedullary nail with lock circle shoulder pole type high screw thread spongy bone pinning - Google Patents
Intramedullary nail with lock circle shoulder pole type high screw thread spongy bone pinning Download PDFInfo
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- CN205988317U CN205988317U CN201620676609.5U CN201620676609U CN205988317U CN 205988317 U CN205988317 U CN 205988317U CN 201620676609 U CN201620676609 U CN 201620676609U CN 205988317 U CN205988317 U CN 205988317U
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- screw thread
- pinning
- pole type
- shoulder pole
- spongy bone
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Abstract
A kind of intramedullary nail with lock circle shoulder pole type high screw thread spongy bone pinning, belongs to medical apparatus and instruments, its rivet nut is provided with cancellous threads, and cancellous threads height is 0.2 2.5mm, and the cancellous threads silk bottom of rivet nut is circle shoulder pole type.The utility model has the advantages that：The high screw thread design of spongy bone pinning is so as to have lock function, angle stability is higher and main nail between；High screw thread spongy bone pinning opposite end fracture encircles extruding fixation；Circle shoulder pole type design, makes the stress of pinning disperse, fatigue resistance strengthens.
Description
Technical field
This utility model belongs to a kind of medical apparatus and instruments, particularly to a kind of intramedullary nail with lock circle shoulder pole type high screw thread spongiosa
Bone pinning.
Background technology
At present, intramedullary nail with lock mostly is polished rod non-threaded pinning with pinning, or low thread pinning.There is following defect in it：
1st, poor to sclerotin hold, especially poor to the hold or fixing intensity of Grafting Cancellous Bone Bolt folded block；2nd, because non-threaded or screw thread are low, early
There is preferably strong fixation phase, and late period, its strong fixation can lead to the stress shielding of intramedullary nail with lock, and causes union of fracture to delay
Slowly, or the complications such as disunion, that is, there is no transformation for stress function；3rd, because the main nail proximal diameter of tibia marrow nail is fixing
, its pinning bore dia is also fixing, and such as pinning has screw thread, and the fatigue resistance of pinning can substantially reduce, and leads to pinning to break
Split.
Utility model content
The purpose of this utility model is to overcome above-mentioned defect, provides a kind of intramedullary nail with lock to justify the high screw thread of shoulder pole type
Spongy bone pinning, the high screw thread design of spongy bone pinning is so as to have lock function, angle stability is higher and main nail between；High spiral shell
Stricture of vagina spongy bone pinning opposite end fracture encircles extruding fixation；Circle shoulder pole type design, makes the stress of pinning disperse, fatigue resistance
Strengthen.
The purpose of this utility model is achieved through the following technical solutions：A kind of intramedullary nail with lock circle high spiral shell of shoulder pole type
Stricture of vagina spongy bone pinning, it include rivet nut and the head of a nail it is characterised in that：Described rivet nut is provided with cancellous threads, cancellous threads
It is highly 0.2 2.5mm, the cancellous threads silk bottom of rivet nut is circle shoulder pole type.
Pitch 1.0 4.0mm of described cancellous threads.
Described silk bottom diameter 2.0 6.0mm, rivet nut external diameter 4.5-6.5mm.
Advantage of the present utility model and beneficial effect are：
1st, the silk bottom of pinning is circle shoulder pole type, so that pinning stress is disperseed, fatigue resistance strengthens.
2nd, cancellous threads pinning, has equally preferably strong fixation in early days, and late period crushes to sclerotin because of its high screw thread,
Make screw thread local bone absorption, and then so that pinning is automatically changed to Dynamic fixation from firm static fixation, thus reaching locking marrow
The stress transfer of interior nail gives the skeleton gradually healing, and promotes union of fracture, reduces the complications that nonunion iso-stress is blocked, that is,
Achieve the automatic changing function of stress.
3rd, the high screw thread spongy bone pinning pulling force certain to bone fracture block, therefore rises and encircles fixation.
4th, pinning selects cancellous bone screw, high screw thread design, makes tight fit between pinning and main nail, has real meaning
Lock function, that is, angle stability is higher.
5th, circle shoulder pole type high screw thread spongy bone pinning, it can be in the case of the diameter limiting pinning, and pinning still has one
Determine intensity, there is locking, the automatic changing function of stress and the good resisting fatigue of the hold to spongy bone, main nail and pinning again
Property.
Brief description
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the right view of Fig. 1.
Wherein：1- rivet nut, the 2- head of a nail, 3- cancellous threads, 4- silk bottom.
Specific embodiment
Embodiment：As illustrated, a kind of intramedullary nail with lock circle shoulder pole type high screw thread spongy bone pinning, it includes rivet nut 1
With the head of a nail 2, described rivet nut 1 is provided with cancellous threads 3, and cancellous threads 3 height is 0.2 2.5mm, pitch 1.0
4.0mm, the cancellous threads silk bottom 4 of rivet nut 1 is circle shoulder pole type, silk bottom diameter 2.0 6.0mm, rivet nut external diameter 4.5-6.5mm.
Claims (3)
1. a kind of intramedullary nail with lock circle shoulder pole type high screw thread spongy bone pinning, it include rivet nut and the head of a nail it is characterised in that：Institute
State rivet nut and be provided with cancellous threads, cancellous threads height is 0.2 2.5mm, the cancellous threads silk bottom of rivet nut is round flat
Load shape.
2. a kind of intramedullary nail with lock according to claim 1 with circle shoulder pole type high screw thread spongy bone pinning it is characterised in that：
Pitch 1.0 4.0mm of described cancellous threads.
3. a kind of intramedullary nail with lock according to claim 1 with circle shoulder pole type high screw thread spongy bone pinning it is characterised in that：
Described silk bottom diameter 2.0 6.0mm, rivet nut external diameter 4.5-6.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620676609.5U CN205988317U (en) | 2016-06-30 | 2016-06-30 | Intramedullary nail with lock circle shoulder pole type high screw thread spongy bone pinning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620676609.5U CN205988317U (en) | 2016-06-30 | 2016-06-30 | Intramedullary nail with lock circle shoulder pole type high screw thread spongy bone pinning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205988317U true CN205988317U (en) | 2017-03-01 |
Family
ID=58102051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620676609.5U Active CN205988317U (en) | 2016-06-30 | 2016-06-30 | Intramedullary nail with lock circle shoulder pole type high screw thread spongy bone pinning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205988317U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108652725A (en) * | 2018-05-23 | 2018-10-16 | 江苏艾为康医疗器械科技有限公司 | Elastic pinning for cross locking marrow nail |
-
2016
- 2016-06-30 CN CN201620676609.5U patent/CN205988317U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108652725A (en) * | 2018-05-23 | 2018-10-16 | 江苏艾为康医疗器械科技有限公司 | Elastic pinning for cross locking marrow nail |
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