CN207286128U - Fracture of calcaneus inner fixing device - Google Patents
Fracture of calcaneus inner fixing device Download PDFInfo
- Publication number
- CN207286128U CN207286128U CN201820053638.5U CN201820053638U CN207286128U CN 207286128 U CN207286128 U CN 207286128U CN 201820053638 U CN201820053638 U CN 201820053638U CN 207286128 U CN207286128 U CN 207286128U
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- China
- Prior art keywords
- screw
- screw thread
- fixing device
- fracture
- inner fixing
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Abstract
The utility model discloses a kind of fracture of calcaneus inner fixing device, including：Screw, it sequentially includes ailhead, nail rod and nail tail from one end to the other end；The first screw thread is provided with the outer wall of the ailhead, is provided with the second screw thread on the outer wall of the nail tail, and the width of thread of first screw thread and pitch are respectively less than the width of thread and pitch of second screw thread.It is by setting both ends to be threaded, the screw-like structure of middle part non-threaded, and tuberosity of calcaneus can be made to increase with posterior articular surface distance, realize the reset and fixation to calcaneum, the surface of a wound is small, realizes Micro-operation.
Description
Technical field
The field of medical instrument technology is the utility model is related to, more particularly to a kind of fracture of calcaneus inner fixing device.
Background technology
For orthopaedic trauma doctor, the treatment of fracture of calcaneus is extremely challenging, and the covering of calcaneum surrounding soft tissue is few, with
The anatomical structure of bone is complex.Therapeutic scheme to orthopaedic trauma doctor causes difficulty.Domestic treatment fracture of calcaneus at present, it is existing
Some treatment methods are by outside classics approach or mini-invasive incision approach mostly, then lock titanium plate and fix, but pass through lock
Determine titanium plate and fix the heel portion skin tension force increase so that originally fragile, and then easily skin disunion occur so that skin is bad
Dead probability increase.And inserting due to titanium plate, can all there is larger notch, and titanium plate can produce occupation time process.Due to titanium plate
Fixed many defects, the case that also useful hollow lag screw treats fracture of calcaneus in existing treatment method, so
And although traditional hollow lag screw belongs to Micro-operation, but the design problem due to hollow lag screw in itself, pulling force
Effect can make calcaneum cripetura, and articular surface, which resets, to be lost.
Utility model content
One purpose of the utility model is to solve at least the above, and provides the advantages of at least will be described later.
The utility model also has a purpose to be to provide a kind of fracture of calcaneus inner fixing device, by setting both ends to carry spiral shell
Line, the screw-like structure of middle part non-threaded, can increase tuberosity of calcaneus and posterior articular surface distance, realize reset to calcaneum and
Fixed, the surface of a wound is small, realizes Micro-operation.
In order to realize these purposes and further advantage according to the present utility model, there is provided fixed dress in a kind of fracture of calcaneus
Put, including：
Screw, it sequentially includes ailhead, nail rod and nail tail from one end to the other end；Is provided with the outer wall of the ailhead
One screw thread, is provided with the second screw thread on the outer wall of the nail tail, and the width of thread of first screw thread and pitch are respectively less than
The width of thread and pitch of second screw thread.
Preferably, in the fracture of calcaneus inner fixing device, the pitch of first screw thread is 1-1.5mm；It is described
The pitch of second screw thread is 2-3mm.
Preferably, in the fracture of calcaneus inner fixing device, the pitch of first screw thread is the second thread pitch
1/2, and the outside diameter of first screw thread is identical with the internal diameter of the second screw thread.
Preferably, in the fracture of calcaneus inner fixing device, the end set of the ailhead is outwardly arc
Face.
Preferably, in the fracture of calcaneus inner fixing device, the screw is less than for the diameter of the cross section of ailhead
Follow closely the taper of the diameter of the cross section of tail.
Preferably, in the fracture of calcaneus inner fixing device, the screw is hollow setting.
Preferably, in the fracture of calcaneus inner fixing device, further include：
Screw tap is screwed in, it includes screwing in handle and hollow screw-in bar；Bar is vertical sets with the screw-in for the screw-in handle
Put, and the axial center for screwing in handle is fixedly connected with the end of the first end of the screw-in bar；The screw-in bar
Threeth screw thread identical with the lines of first screw thread, first side for screwing in bar are provided with the outer wall of second side
Outer wall be provided with fourth screw thread identical with the lines of second screw thread, and the 1- of the end of the second end for screwing in bar
2cm non-threadeds.
Preferably, in the fracture of calcaneus inner fixing device, the end set of the nail tail has the rotation being recessed inwardly
Enter groove, the cross section for screwing in groove is any of yi word pattern, cross, triangle, quadrangle, hexagon or star.
Preferably, in the fracture of calcaneus inner fixing device, the length of the screw is 46-54mm, the ailhead
Length be 6-8mm, it is described nail tail length be 18-22mm.
The utility model includes at least following beneficial effect：
The utility model is respectively provided with screw thread by the ailhead and nail tail for setting the inner fixing device of the fracture of calcaneus, and follows closely
The width and pitch of the screw thread of head are less than the width and pitch of the screw thread of nail tail so that are using the inner fixing device to calcaneum
When being fixed in progress, since the pitch and the width of thread of bottom are big, into the speed of calcaneum, and the pitch of ailhead and screw thread
Width is small, the speed into calcaneus joint face is slower, so that the principle produced similar to screw jack struts effect so that
The distance of tuberosity of calcaneus and posterior articular surface increases, and posterior articular surface is jacked up, so as to reset and fix calcaneum.Avoid to utilize and lock titanium
Heel portion skin tension force increase caused by plate is fixed, and then easily there is skin disunion so that cutaneous necrosis probability is increased
Drawback.It it also avoid making calcaneum cripetura using existing hollow lag screw, articular surface resets the drawbacks of losing.
The further advantage, target and feature of the utility model embody part by following explanation, and part will also pass through
Research and practice to the utility model and be understood by the person skilled in the art.
Brief description of the drawings
Fig. 1 is the structure diagram of the screw of fracture of calcaneus inner fixing device described in the utility model；
Fig. 2 is the structure diagram of the screw tap of fracture of calcaneus inner fixing device described in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to explanation
Book word can be implemented according to this.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein are not precluded from one or more
The presence or addition of a other elements or its combination.
As shown in Figure 1, the utility model provides fracture of calcaneus inner fixing device, including：Screw, it is from one end to the other end
Sequentially include ailhead 1, nail rod 2 and nail tail 3；The first screw thread 4 is provided with the outer wall of the ailhead 1, on the outer wall of the nail tail 3
Be provided with the second screw thread 5, and the width of thread of first screw thread 4 and pitch be respectively less than second screw thread 5 screw thread it is wide
Degree and pitch.
In such scheme, screw thread is respectively provided with by the ailhead and nail tail for the inner fixing device for setting the fracture of calcaneus,
And the width and pitch of the screw thread of ailhead are less than the width and pitch of the screw thread of nail tail so that are using the inner fixing device pair
Calcaneum carry out in when fixing, since the pitch and the width of thread of bottom are big, into the speed of calcaneum, and the pitch of ailhead and
The width of thread is small, the speed into calcaneus joint face is slower, so that the principle produced similar to screw jack struts effect,
So that the distance of tuberosity of calcaneus and posterior articular surface increases, posterior articular surface is jacked up, so as to reset and fix calcaneum, and utilizes soft tissue
Clamping plate acts on, and Indirect reduction calcaneum lateral wall protrudes.Heel portion skin tension force caused by using titanium plate fixation is locked is avoided to increase
Add, and then easily skin disunion occur so that the drawbacks of cutaneous necrosis probability increase.It it also avoid using existing hollow drawing
Power screw makes calcaneum cripetura, and articular surface resets the drawbacks of losing.These, it is preferred to which ailhead uses locking screw thread, nail tail uses
Cancellous threads.
In one preferred solution, the pitch of first screw thread 4 is 1-1.5mm；The pitch of second screw thread 5 is 2-
3mm。
In such scheme, found by clinical trial, by the first screw thread of the inner fixing device and the second screw thread
It is best for the interior fixed effect of calcaneum when pitch is each defined in 1-1.5mm and 2-3mm, wherein it is preferred that the first screw thread
Pitch be 1.25mm, the pitch of the second screw thread is 2.5mm.
In one preferred solution, the pitch of first screw thread 4 is the 1/2 of 5 pitch of the second screw thread, and first screw thread
4 outside diameter is identical with the internal diameter of the second screw thread 5.
In one preferred solution, the end set of the ailhead 1 is outwardly cambered surface.
In such scheme, by being outwardly cambered surface by the end set of ailhead, i.e., round end designs, non-existing skill
Self-tapping screw in art, because ailhead is relatively thin in itself, and has the guiding of seal wire so that the screw that round end is set can easily also revolve
Enter in calcaneum, and avoid the danger that inner fixing device wears out facies articularis calcanea posterior so that the inner fixing device is using more
Safety.
In one preferred solution, the screw is less than the diameter of the cross section of nail tail 3 for the diameter of the cross section of ailhead 1
Taper.
In such scheme, by setting screw as taper of the nail tail more than ailhead so that screw is more easy to enter calcaneum, and
Since nail tail is relatively large in diameter, preferably fixed effect can be played.At present, it is preferred to inner fixing device there are three kinds of specifications,
Respectively ailhead 2.5mm, nail tail 3mm；Ailhead 3.5mm, follows closely tail 4.5mm, and ailhead 5.5mm, nail tail 6.5mm.
In one preferred solution, the screw is hollow setting.
It is hollow by setting screw so that seal wire can be in the hole in the middle part of screw, and then utilizes in such scheme
Seal wire plays guiding role to screw.
As shown in Fig. 2, in a preferred solution, further include：Screw tap is screwed in, it includes screwing in handle 7 and hollow screw-in
Bar 8；The screw-in handle 7 is vertically arranged with the screw-in bar 8, and the axial center for screwing in handle 7 and the screw-in
The end of the first end of bar 8 is fixedly connected；It is provided with and first screw thread 4 on the outer wall of second side for screwing in bar 8
Identical the 3rd screw thread 9 of lines, the outer wall of first side for screwing in bar 8 is provided with the lines with second screw thread 5
The 4th identical screw thread 10, and the 1-2cm non-threadeds of the end of the second end for screwing in bar 8.
In such scheme, by the setting for screwing in screw tap so that can be with by screwing in screw tap before the screw screws in
In bone road be the screw set out respectively with the first screw thread of the screw and the screw thread of the second thread fitting so that convenient
The screw-in of the screw, improves the work efficiency of medical staff, and second screw thread of the utility model is preferably arranged to self tapping
The screw thread of formula, and then enable to the screw as soon as possible into road to the marrow, so as to further save the time of operation；And revolve
The outer wall end for entering bar is arranged to round end, not threaded, and the 3rd screw thread is the screw thread of self-tapping type so that sets spiral shell in bone road
Line passage is more convenient, and avoids the danger that facies articularis calcanea posterior is worn out in end, and use is safer, and tap out passage
Afterwards, the rotation implantation of screw is more advantageous to, osteonecrosis is reduced, increases hold；In addition, the outside diameter of the first screw thread is equal to the second spiral shell
The internal diameter of line so that the spiral shell road of the 4th screw thread tapping on the screw tap coordinated with it will not destroy the Luo Dao of the 3rd screw thread tapping.
In one preferred solution, the end set of the nail tail 3 has the screw-in groove 6 being recessed inwardly, the horizontal stroke for screwing in groove 6
Section is any of yi word pattern, cross, triangle, quadrangle, hexagon or star.
In such scheme, pass through the screw-in groove being recessed inwardly in the end set of positioning so that the inner fixing device
Inner fixing device can also be screwed in calcaneum by the instrument arbitrarily coordinated with screwing in groove so that it is more convenient to use, flexibly,
The cross section of wherein screw-in groove is not limited to one kind in yi word pattern, cross, triangle, quadrangle hexagon or star,
It can also be the arbitrary shape that other facilitate the inner fixing device to screw in.
In one preferred solution, the length of the screw is 46-54mm, and the length of the ailhead 1 is 6-8mm, the nail
The length of tail 3 is 18-22mm.
In such scheme, by limiting the length of screw, the length of ailhead and the length for following closely tail so that described interior solid
It is best to determine effect when device is fixed in being carried out to calcaneum, meanwhile, the cross-sectional diameter of inner fixing device only 6.5-2.5mm it
Between, it can be achieved that insert the purpose of the inner fixing device with small notch, belong to Micro-operation, the size of notch is only 3-6mm,
Avoid the generation of scar after patient trauma.
Although the embodiment of the utility model is disclosed as above, it is not restricted in specification and embodiment
Listed utilization, it can be applied to the field of various suitable the utility model completely, for those skilled in the art,
Other modification is easily achieved, therefore under the universal limited without departing substantially from claim and equivalency range, this reality
Specific details is not limited to new and shown here as the legend with description.
Claims (9)
- A kind of 1. fracture of calcaneus inner fixing device, it is characterised in that including：Screw, it sequentially includes ailhead, nail rod and nail tail from one end to the other end；The first spiral shell is provided with the outer wall of the ailhead Line, is provided with the second screw thread on the outer wall of the nail tail, and the width of thread of first screw thread and pitch be respectively less than it is described The width of thread and pitch of second screw thread.
- 2. fracture of calcaneus inner fixing device as claimed in claim 1, it is characterised in that the pitch of first screw thread is 1- 1.5mm；The pitch of second screw thread is 2-3mm.
- 3. fracture of calcaneus inner fixing device as claimed in claim 2, it is characterised in that the pitch of first screw thread is second The 1/2 of thread pitch, and the outside diameter of first screw thread is identical with the internal diameter of the second screw thread.
- 4. fracture of calcaneus inner fixing device as claimed in claim 1, it is characterised in that the end set of the ailhead is outside The cambered surface of protrusion.
- 5. fracture of calcaneus inner fixing device as claimed in claim 1, it is characterised in that the screw is the cross section of ailhead Diameter is less than the taper of the diameter of the cross section of nail tail.
- 6. fracture of calcaneus inner fixing device as claimed in claim 1, it is characterised in that the screw is hollow setting.
- 7. fracture of calcaneus inner fixing device as claimed in claim 6, it is characterised in that further include：Screw tap is screwed in, it includes screwing in handle and hollow screw-in bar；The screw-in handle is vertically arranged with the screw-in bar, and The axial center for screwing in handle is fixedly connected with the end of the first end of the screw-in bar；The second end for screwing in bar Threeth screw thread identical with the lines of first screw thread, the outer wall of first side for screwing in bar are provided with the outer wall of side Be provided with fourth screw thread identical with the lines of second screw thread, and the 1-2cm of the end of the second end for screwing in bar without Screw thread.
- 8. fracture of calcaneus inner fixing device as claimed in claim 6, it is characterised in that the end set of the nail tail has inwardly Concave screw-in groove, the cross section for screwing in groove is in yi word pattern, cross, triangle, quadrangle, hexagon or star It is any.
- 9. fracture of calcaneus inner fixing device as claimed in claim 1, it is characterised in that the length of the screw is 46-54mm, The length of the ailhead is 6-8mm, and the length of the nail tail is 18-22mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820053638.5U CN207286128U (en) | 2018-01-12 | 2018-01-12 | Fracture of calcaneus inner fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820053638.5U CN207286128U (en) | 2018-01-12 | 2018-01-12 | Fracture of calcaneus inner fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207286128U true CN207286128U (en) | 2018-05-01 |
Family
ID=62274365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820053638.5U Expired - Fee Related CN207286128U (en) | 2018-01-12 | 2018-01-12 | Fracture of calcaneus inner fixing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207286128U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112155701A (en) * | 2020-10-10 | 2021-01-01 | 江山市人民医院 | Adjustable screw for calcaneus |
-
2018
- 2018-01-12 CN CN201820053638.5U patent/CN207286128U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 Termination date: 20200112 |