CN204931833U - A kind of low incisura self-taped type stops screw - Google Patents
A kind of low incisura self-taped type stops screw Download PDFInfo
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- CN204931833U CN204931833U CN201520693051.7U CN201520693051U CN204931833U CN 204931833 U CN204931833 U CN 204931833U CN 201520693051 U CN201520693051 U CN 201520693051U CN 204931833 U CN204931833 U CN 204931833U
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Abstract
This utility model relates to technical field of medical instruments, especially a kind of low incisura self-taped type stops screw, comprise and stop screw cap and stop shank of screw, stop that the free end of shank of screw is formed with conical stop head of screw, stop that screw cap is conical, stop that screw cap has the end face bottom surface identical with stopping shank of screw external diameter with a diameter, end face diameter and basal diameter are than being 5-8:4, and the distance between end face and bottom surface is 2mm-4mm.The low incisura self-taped type of the one that this utility model provides stops screw, can insert along 2.0mm-2.5mm guide pin, stop that screw cap is designed to taper shape, the incisura formed after the implantation is lower, decrease soft tissue excitation, and effectively prevent the fracture after Intramedullary nailing to be again shifted, structure is simple, convenient operation; This product is that low incisura self-taped type stops screw, can accurately locate along guide pin according to clinical operation demand and insert, play vital effect to stop.
Description
Technical field
This utility model relates to technical field of medical instruments, and especially a kind of low incisura self-taped type stops screw.
Background technology
Intramedullary pin technology is surgical operation therapy one method, along with clinical practice and new clinical problem occur, Intramedullary nailing technology is always in constantly innovation and improvement, due to the limitation of intramedullary pin locking screw quantity, cause the appearance of the problems such as the loss of the fixing rear reduction of the fracture, when at present clinically Intramedullary nailing using for the shaft fracture near metaphysis, often need additionally to stop that screw is to increase stability; The stop screw used now is the inter-locking screw of common os integumentale screw or intramedullary pin, and the former needs first to hole, can be screwed into after tapping; The latter costly, and also needs prior boring; Owing to being mini-invasive incision when implanting and stop screw, in addition above operation is not owing to having good guiding device, change hole when often causing be screwed into screw as the position that the soft tissues such as femur are abundant and hold direction difficulty, moreover the head of a nail incisura of above two kinds of screws is all higher, soft tissue excitation may be caused, stimulate or tissue such as compressing tendon, ligament etc.
Utility model content
The technical problems to be solved in the utility model is: in order to fundamentally solve Intramedullary nailing retrodisplacement, the problem that fixation failure is higher with stop screw cap incisura, this utility model provides a kind of low incisura self-taped type and stops screw, stop that screw cap is designed to taper shape, the incisura formed after the implantation is lower, decreases soft tissue excitation, can precisely, easily insert, convenient and simple for operation, be conducive to postoperative wound healing.
This utility model solves the technical scheme that its technical problem adopts: a kind of low incisura self-taped type stops screw, comprise and stop screw cap and stop shank of screw, stop that shank of screw sidewall is formed with screw thread, stop that the free end of shank of screw is formed with conical stop head of screw, described stop screw cap is conical, described stop screw cap has the end face bottom surface identical with stopping shank of screw external diameter with a diameter, described end face diameter and basal diameter are than being 5-8:4, and the distance between described end face and bottom surface is 2.0mm-4.0mm.
In order to avoid stopping that the edge of screw cap forms cutting to surface of bone, the one-body molded cylinder having 1.0mm that a diameter is identical with end face diameter high on described stop screw cap end face.
As preferably, described stop head of screw comprises some groups and is distributed on and stops chip area around head of screw and cutting edge.
Particularly, described stop head of screw comprises three groups of chip areas and cutting edge.
Particularly, described cutting edge is being crossed the straight line of the projection formation on the section stopping screw axis and is stopping that the angle α of screw axis is 6-15 °.
Particularly, the diameter of described stop shank of screw is 3.5mm-4.5mm.
Particularly, described stop screw cap center has the apparatus mouth being convenient to rotate stop screw.
Particularly, described apparatus mouth is interior hexagonal counterbore, cross recess or flat recess.
As preferably, described stop screw is that hollow stops screw.What low incisura stopped screw has cavity, can insert, can form good guide effect, according to clinical operation demand, can locate and insert, playing vital effect to stop along 2.0mm-2.5mm guide pin.
As preferably, described thread depth is 0.3mm-1.0mm.Screw can be made to be screwed into easily.
The beneficial effects of the utility model are: the low incisura self-taped type of the one that this utility model provides stops screw, and stop that screw cap is designed to taper shape, the incisura formed after the implantation is lower, decreases soft tissue excitation, and facilitates operation.This product be low incisura self-taped type stop screw, can insert easily along the Kirschner wire pierced in advance with guide effect, can according to operation demand, accurately locate and insert, both facilitate, accurately in turn simplify stop screw insert step.For the unstable fracture after Interlocking intramedullary fixation, according to 2 or 3 fixation principle, between intramedullary pin and cortical bone, add 1-2 piece stop screw, the skew of intramedullary pin in pulp cavity can be corrected, strengthen the lateral stability of intramedullary pin-bone, will be unfavorable for that the shear stress of union of fracture is converted into the axial stress being conducive to union of fracture.Or before inserting intramedullary pin, first insert stop nail, control the nail road of intramedullary pin.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, this utility model is further illustrated.
Fig. 1 is the structural representation that a kind of low incisura self-taped type of the present utility model stops screw;
Fig. 2 is the partial sectional view that a kind of low incisura self-taped type of the present utility model stops screw.
In figure: 1. stop screw cap, 2. stop shank of screw, 3. stop head of screw, 4. cylinder, 11. end faces, 12. bottom surfaces, 13. apparatus mouths, 31. chip areas, 32. cutting edges.
Detailed description of the invention
By reference to the accompanying drawings this utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with this utility model.
As shown in Figure 1 and Figure 2, a kind of low incisura self-taped type stops screw, comprise and stop screw cap 1 and stop shank of screw 2, stop that the free end of shank of screw 2 is formed with conical stop head of screw 3, stop that screw cap 1 is conical, stop that screw cap 1 has an end face 11 bottom surface 12 identical with stopping shank of screw 2 external diameter with a diameter, end face 11 diameter and bottom surface 12 diameter are than being 5-8:4, and the distance between end face 11 and bottom surface 12 is 2.0mm-4mm.
As preferably, stop that the diameter of shank of screw 2 is 3.5mm-4.5mm.
In a kind of detailed description of the invention, stop that screw is that hollow stops screw.Good guide effect can be formed, according to clinical operation demand, can locate and insert, vital effect is played to stop.
In a kind of detailed description of the invention, stop that head of screw 3 comprises some groups and is distributed on and stops chip area 31 around head of screw 3 and cutting edge 32.Chip area 31, when stopping in screw placement bone, is conducive to discharging bone bits.
In this embodiment, stop that head of screw 3 comprises three groups of chip areas 31 and cutting edge 32.
In a kind of detailed description of the invention, cutting edge 32 is 6 °-15 ° at the angle of the straight line and stop screw axis of crossing the projection formation on the section stopping screw axis.In this concrete enforcement, the straight line that the projection of cutting edge 32 on the section crossing stop screw axis is formed is 8 ° with the angle of stop screw axis.
In a kind of detailed description of the invention, stop that screw cap 1 center has and be convenient to rotate the apparatus mouth 13 stopping screw.Wherein apparatus mouth 13 is interior hexagonal counterbore, cross recess or flat recess, also can be other non-standard apparatus mouths 13, and can be the counterbore of the rule such as pentagon, triangle, also can be special-shaped counterbore.
In a kind of detailed description of the invention, stop the one-body molded cylinder 4 having 1.0mm that a diameter is identical with end face 11 diameter high on screw cap 1 end face 11.Can effectively avoid stopping that the edge of screw cap 1 forms cutting to surface of bone.
In a kind of detailed description of the invention, thread depth is 0.3mm-1.0mm, and screw can be made to be screwed into easily.In this specific embodiment, thread depth is 0.5mm.
When needing to use stop screw, after measuring length, hole along the Kirschner wire hollow boring bit of inserting in advance, the low incisura hollow self tapping being directly screwed into appropriate length stops screw, significantly simplify the step that this kind of screw is inserted, facilitate the use stopping screw, the low incisura design of this screw cap decreases the probability of soft tissue excitation and damage.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content in description, must determine its technical scope according to right.
Claims (10)
1. one kind low incisura self-taped type stops screw, comprise and stop screw cap and stop shank of screw, stop that shank of screw sidewall is formed with screw thread, stop that the free end of shank of screw is formed with conical stop head of screw, it is characterized in that: described stop screw cap is for conical, described stop screw cap has the end face bottom surface identical with stopping shank of screw external diameter with a diameter, and described end face diameter and basal diameter are than being 5-8:4, and the distance between described end face and bottom surface is 2.0mm-4.0mm.
2. the low incisura self-taped type of one according to claim 1 stops screw, it is characterized in that: the one-body molded cylinder having 1.0mm that a diameter is identical with end face diameter high on described stop screw cap end face.
3. the low incisura self-taped type of one according to claim 1 stops screw, it is characterized in that: described stop head of screw comprises some groups and is distributed on and stops chip area around head of screw and cutting edge.
4. the low incisura self-taped type of one according to claim 3 stops screw, it is characterized in that: described stop head of screw comprises three groups of chip areas and cutting edge.
5. the low incisura self-taped type of one according to claim 3 stops screw, it is characterized in that: described cutting edge is being crossed the straight line of the projection formation on the section stopping screw axis and stopping that the angle α between screw is 6-15 °.
6. the low incisura self-taped type of one according to claim 5 stops screw, it is characterized in that: the diameter of described stop shank of screw is 3.5mm-4.5mm.
7. the low incisura self-taped type of one according to claim 1 stops screw, it is characterized in that: described stop screw cap center has to be convenient to rotate the apparatus mouth stopping screw.
8. the low incisura self-taped type of one according to claim 7 stops screw, it is characterized in that: described apparatus mouth is interior hexagonal counterbore, cross recess or flat recess.
9. the low incisura self-taped type of the one according to any one of claim 1-8 stops screw, it is characterized in that: described stop screw is that hollow stops screw, and the internal diameter of hollow is 2.0mm-2.5mm, can be screwed into along the Kirschner wire of respective diameters.
10. the low incisura self-taped type of one according to claim 1 stops screw, it is characterized in that: described thread depth is 0.3mm-1.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520693051.7U CN204931833U (en) | 2015-09-08 | 2015-09-08 | A kind of low incisura self-taped type stops screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520693051.7U CN204931833U (en) | 2015-09-08 | 2015-09-08 | A kind of low incisura self-taped type stops screw |
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| Publication Number | Publication Date |
|---|---|
| CN204931833U true CN204931833U (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520693051.7U Active CN204931833U (en) | 2015-09-08 | 2015-09-08 | A kind of low incisura self-taped type stops screw |
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| CN (1) | CN204931833U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109480986A (en) * | 2018-12-05 | 2019-03-19 | 常州市康辉医疗器械有限公司 | A kind of intramedullary nail pinning of undercut mark |
| CN109480987A (en) * | 2018-12-05 | 2019-03-19 | 常州市康辉医疗器械有限公司 | A kind of Intramedullary nailing tail cap of bion undercut mark |
-
2015
- 2015-09-08 CN CN201520693051.7U patent/CN204931833U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109480986A (en) * | 2018-12-05 | 2019-03-19 | 常州市康辉医疗器械有限公司 | A kind of intramedullary nail pinning of undercut mark |
| CN109480987A (en) * | 2018-12-05 | 2019-03-19 | 常州市康辉医疗器械有限公司 | A kind of Intramedullary nailing tail cap of bion undercut mark |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160510 Address after: 210029 Nanjing, Gulou District, Jiangsu, No. 300 Guangzhou Road Patentee after: No.1 Attached Hospital, Nanjing Medical Univ. Address before: 213164 West Lake Road, Wujin high tech Zone, Jiangsu, China, No. 9, No. Patentee before: Changzhou Waston Medical Appliance Co., Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Changzhou Waston Medical Appliance Co., Ltd. Assignor: The First Affiliated Hospital of Nanjing Medical University Contract record no.: 2016320000224 Denomination of utility model: Low notch self tapping type blocks screw Granted publication date: 20160106 License type: Exclusive License Record date: 20161208 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |