CN205994559U - A kind of hollow screw for bone surgery - Google Patents
A kind of hollow screw for bone surgery Download PDFInfo
- Publication number
- CN205994559U CN205994559U CN201620398674.6U CN201620398674U CN205994559U CN 205994559 U CN205994559 U CN 205994559U CN 201620398674 U CN201620398674 U CN 201620398674U CN 205994559 U CN205994559 U CN 205994559U
- Authority
- CN
- China
- Prior art keywords
- screw thread
- tail
- nail
- pitch
- hollow screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Surgical Instruments (AREA)
Abstract
This utility model is related to technical field of medical instruments, especially a kind of hollow screw for bone surgery, including ailhead, nail rod and nail tail, ailhead and nail tail are connected as one by nail rod, ailhead is provided with end screw thread, nail tail is provided with tail screw thread, the pitch of end screw thread is more than the pitch of tail screw thread, it is easy to be screwed into, and because pitch is different during being screwed into, make vertebral body and the limited pressurization of vertebral plate, oblique self tapping groove is all had on end screw thread and tail screw thread, from work(groove oblique cut end screw thread and tail screw thread, self tapping groove is easy to hollow screw and is rotated and imbed in sclerotin, the end face of nail tail is provided with flat recess, flat recess is selected into instrument for cooperation and is selected in sclerotin.
Description
Technical field
This utility model is related to technical field of medical instruments, especially a kind of hollow screw for bone surgery.
Background technology
Hollow screw of the prior art is primarily adapted for use in during bone surgery and does Fracture internal fixaiion use, at 20 years of the past
In, gradually faced by vast in the descending micro-wound percutaneous hollow screw technique for fixing treatment Sacroiliac joint injury of X-ray examination navigation
Bed doctor accepts.With the development of anatomy and image technology, iatrogenic nerve, blood vessel injury substantially reduce.But there is money
Material display, treats Sacroiliac joint injury in the descending micro-wound percutaneous hollow screw of X-ray examination navigation, can reach 84% anatomical reduction
Or approximate anatomical reduction, but still there is 44% hollow screw to put rate by mistake.The sky of the unilateral Sacroiliac joint injury of existing frequently-used treatment
Heart screw is to insert S1 vertebral body, and across center line, to obtain its stability.Existing hollow screw is more difficult when screwing in, rotation
There is fixing unstable problem after entering.
Utility model content
The purpose of this utility model is the defect overcoming prior art to exist, and provides a kind of hollow spiral shell for bone surgery
Nail, screws in quick and stable connection.
This utility model solves its technical problem and be employed technical scheme comprise that：
Hollow screw for bone surgery of the present utility model includes ailhead, nail rod and nail tail, described ailhead and nail tail
Connected as one by nail rod, described ailhead is provided with end screw thread, described nail tail is provided with tail screw thread, the pitch of described end screw thread is more than tail
Oblique self tapping groove is all had on the pitch of screw thread, described end screw thread and tail screw thread, the end face of described nail tail is provided with flat recess,
Have through hole in described hollow screw, be provided with guide pin in described through hole, one end of described guide pin is insertion end, described insertion
The outer peripheral face at end is provided with external screw thread, and the other end of described guide pin is pinching end, and the outer peripheral face of described pinching end is provided with
Friction protrusion.
The pinching end of guide pin described in the utility model includes revolving by clamping throw clamping, described clamping throw
Adaptor and two groups of handles being fixed on swivel joint, are provided with the holder clamping described pinching end, institute between two groups of handles
State swivel joint and be provided with the lobe with the cooperation of described flat recess.
The pitch of end described in the utility model screw thread is 1.75mm, and the pitch of described tail screw thread is 1.25mm,.
A diameter of 2.2mm of the through hole in hollow screw described in the utility model.
Nail rod described in the utility model is titanium alloy nail rod.
Hollow screw beneficial effect for bone surgery of the present utility model is：Of the present utility model for bone surgery
Hollow screw include ailhead, nail rod and nail tail, ailhead and nail tail are connected as one by nail rod, and ailhead is provided with end screw thread, follows closely tail
It is provided with tail screw thread, the pitch of end screw thread is more than the pitch of tail screw thread, is easy to be screwed into, and because pitch is different during being screwed into,
Make vertebral body and the limited pressurization of vertebral plate, end screw thread and tail screw thread all have oblique self tapping groove, from work(groove oblique cut end screw thread
With tail screw thread, self tapping groove is easy to hollow screw and rotates and imbed in sclerotin, and the end face of nail tail is provided with flat recess, and flat recess is used for
Cooperation is selected into instrument and is selected in sclerotin.
Brief description
With reference to the accompanying drawings and examples this utility model is further illustrated.
Fig. 1 is the hollow screw schematic diagram that this utility model is used for bone surgery；
Fig. 2 is clamping throw structural representation of the present utility model.
Specific embodiment
In order that technical problem, technical scheme and beneficial effect that this utility model is solved become more apparent, below
In conjunction with drawings and Examples, this utility model is further elaborated.It should be appreciated that described herein be embodied as
Example only in order to explain this utility model, is not used to limit this utility model.
Of the present utility model description in it is to be understood that term " radially ", " axial ", " on ", D score, " top ",
The orientation of instruction such as " bottom ", " interior ", " outward " or position relationship are based on orientation shown in the drawings or position relationship, merely to just
In description this utility model and simplification description, rather than the device of instruction or hint indication or element must have specific side
Position, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.In description of the present utility model
In, unless otherwise stated, " multiple " are meant that two or more.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " setting ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly
Connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary.For the ordinary skill in the art,
Concrete meaning in this utility model for the above-mentioned term can be understood as the case may be.
As shown in Figure 1-2, the hollow screw for bone surgery of the present embodiment includes ailhead 1, nail rod 2 and nail tail 3, nail
1 and nail tail 3 connected as one by nail rod 2, ailhead 1 is provided with end screw thread, and nail tail 3 is provided with tail screw thread, and the pitch of end screw thread is more than
The pitch of tail screw thread, is easy to be screwed into, and because pitch is different during being screwed into, makes vertebral body and the limited pressurization of vertebral plate, holds screw thread
With oblique self tapping groove is all had on tail screw thread, from work(groove oblique cut end screw thread and tail screw thread, self tapping groove is easy to hollow screw
Rotate and imbed in sclerotin, the end face of nail tail 3 is provided with flat recess, and flat recess is selected into instrument for cooperation and is selected in sclerotin.
In order to realize being accurately positioned, in hollow screw, have through hole, in through hole, be provided with guide pin 4, before screwing in hollow screw
Guide pin 4 can first be squeezed into and carry out pre-determined bit, screw in hollow screw then along guide pin 4, so that hollow screw is more held
Easily enter sclerotin.
Sutura in order to allow fracture to cause can preferably combine, and one end of guide pin 4 is insertion end, insertion end
Outer peripheral face is provided with external screw thread, when hollow screw screw in after, can clamp and lift guide pin 4 so that detached sutura more
Stick on conjunction.The other end of guide pin 4 is pinching end, and the outer peripheral face of pinching end is provided with friction protrusion, is so easy to clamping and leads
To pin 4 and lift.
The present embodiment also improves a kind of clamping throw 5, and the pinching end of guide pin 4 is clamped by clamping throw 5, folder
Hold throw 5 and include swivel joint 51 and two groups of handles 52 being fixed on swivel joint 51, be provided between two groups of handles 52
The holder of clamping pinching end, swivel joint 51 is provided with the lobe with flat recess cooperation, is pressed from both sides with holder first during use
The pinching end handling guide pin 4 is then locked, and rotation pressure is directed to pin 4 and heads in sclerotin, then using clamping throw 5
Lobe hold out against flat recess, drive hollow screw to rotate and simultaneously screw in along guide pin 4.
Preferably, the pitch of end screw thread is 1.75mm, and the pitch of tail screw thread is 1.25mm, the through hole in hollow screw straight
Footpath is 2.2mm, and nail rod 2 is titanium alloy nail rod.
Above-mentioned is enlightenment according to desirable embodiment of the present utility model, by above-mentioned description, relevant staff
Various change and modification can be carried out in the range of without departing from this utility model technological thought completely.This practicality
Content that new technical scope is not limited in description is it is necessary to determine it according to right technical
Scope.
Claims (4)
1. a kind of hollow screw for bone surgery it is characterised in that：Including ailhead, nail rod and nail tail, described ailhead and nail
Tail is connected as one by nail rod, and described ailhead is provided with end screw thread, and described nail tail is provided with tail screw thread, and the pitch of described end screw thread is more than
Oblique self tapping groove is all had on the pitch of tail screw thread, described end screw thread and tail screw thread, the end face of described nail tail is provided with a word
Groove, has through hole in described hollow screw, is provided with guide pin, one end of described guide pin is insertion end, described in described through hole
The outer peripheral face of insertion end is provided with external screw thread, and the other end of described guide pin is pinching end, on the outer peripheral face of described pinching end
It is provided with friction protrusion；The pinching end of described guide pin is included rotation and is connect by clamping throw clamping, described clamping throw
Head and two groups of handles being fixed on swivel joint, are provided with the holder clamping described pinching end, described rotation between two groups of handles
Adaptor is provided with the lobe with the cooperation of described flat recess.
2. the hollow screw for bone surgery according to claim 1 it is characterised in that：The pitch of described end screw thread is
1.75mm, the pitch of described tail screw thread is 1.25mm.
3. the hollow screw for bone surgery according to claim 2 it is characterised in that：Logical in described hollow screw
A diameter of 2.2mm in hole.
4. the hollow screw for bone surgery according to claim 3 it is characterised in that：Described nail rod is followed closely for titanium alloy
Bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620398674.6U CN205994559U (en) | 2016-05-05 | 2016-05-05 | A kind of hollow screw for bone surgery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620398674.6U CN205994559U (en) | 2016-05-05 | 2016-05-05 | A kind of hollow screw for bone surgery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205994559U true CN205994559U (en) | 2017-03-08 |
Family
ID=58204334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620398674.6U Expired - Fee Related CN205994559U (en) | 2016-05-05 | 2016-05-05 | A kind of hollow screw for bone surgery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205994559U (en) |
-
2016
- 2016-05-05 CN CN201620398674.6U patent/CN205994559U/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: 20170308 Termination date: 20190505 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhang Zilin Document name: Notification of Termination of Patent Right |
|
| DD01 | Delivery of document by public notice |