CN204971551U - Hollow compression screw in hole is let out to double helix - Google Patents
Hollow compression screw in hole is let out to double helix Download PDFInfo
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- CN204971551U CN204971551U CN201520605940.3U CN201520605940U CN204971551U CN 204971551 U CN204971551 U CN 204971551U CN 201520605940 U CN201520605940 U CN 201520605940U CN 204971551 U CN204971551 U CN 204971551U
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- screw
- hole
- double helix
- relief hole
- shank
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Abstract
The utility model discloses a hollow compression screw in hole is let out to double helix, including screwhead, shank of screw, spiral shell screw tail, screw core hole, double helix pressure release hole, pin fin pressure release hole, screw tail pressure release hole, screw core hole link up in screwhead, shank of screw, spiral shell screw tail, spiral shell screw tail portion is equipped with interior hexagonal hole, the screwhead is equipped with the self tapping mouth, the screwhead is equipped with flat mouthful coarse -pitch thread, be equipped with double helix pressure release hole in the middle of the shank of screw, spiral shell screw tail is equipped with screw tail pressure release hole, the screwhead is provided with pin fin pressure release hole, originally, the novel human bone wound fracture that is applicable to holds the connection to fix, installs the back and effectively releases interior pressure, structure fastening stably, realizes simultaneously pressurizeing in last nail, need not to oppose, and it is convenient to perform the operation, just easily lifts off, has reduced patient's misery widely.
Description
Technical field
This utility model relates to a kind of orthopedic medical device technical equipment art apparatus field, and particularly a kind of Double helix lets out hole cannulated compression screw.
Background technology
In recent years, along with social progress, the continuous expansion of traffic and building trade, relate to industry personnel Annual occurence rate of fracturing in rising trend, and be effective Therapeutic Method by surgical operation, the object of operation is normal sequence and curvature, height and the mobility of again recovering fracture, maintains original stability, and improves pressurized function of nervous system.Along with all kinds of new operation is theoretical and the improvement of technique for fixing, clinical operation method also constantly improves, and adopts screw internal fixation treatment fracture to be the most effective Therapeutic Method.
Medical hollow compressive threaded nail is generally used in orthopaedics internal fixation operation, by using pressurization principle, hollow lag screw is adopted directly to fix fracture, engage the broken ends of fractured bone or the osteotomy end of fracture, fixed effect is certain, in prior art, screw nail bar, ailhead, nail tail all participate in fixing fracture site, intrinsic pressure side effect is there is in screw thread pressurised form in operation, it is unfavorable that intrinsic pressure larger recovery of tearing open bone surpasses with the misery alleviating sufferer, materially increases the time of union of fracture and the misery of patient.
Utility model content
For solving the problems of the technologies described above, this utility model provides a kind of Double helix and lets out hole cannulated compression screw, for deficiency of the prior art, adopt the relief hole that double helical bore distribution is set on nail bar, also relief hole is arranged to ailhead and nail tail simultaneously, thus effectively reduce the side effect of intra-osteal pressure, thus make the reduction of the fracture thorough, shorten healing time, decrease patient suffering, improve success rate of operation.
For achieving the above object, the technical solution of the utility model is as follows: a kind of Double helix lets out hole cannulated compression screw, comprise head of screw, shank of screw, screw tail, self tapping mouth, flat mouth coarse-pitch thread, screw core bore, Double helix relief hole, reducing fine thread, spherical caudal knot, inner hexagonal hole, ailhead relief hole, nail tail relief hole, it is characterized in that:
Described Double helix is let out hole cannulated compression screw and is made up of head of screw, shank of screw, screw tail, and described head of screw, shank of screw, screw tail are by the processing and manufacturing of metal bar one; Described Double helix is let out hole cannulated compression screw axial centre and is provided with screw core bore, and described screw core bore runs through described head of screw, shank of screw, screw tail, and described screw core bore afterbody is provided with inner hexagonal hole; Described head of screw tip is provided with self tapping mouth, and described head of screw periphery is provided with flat mouth coarse-pitch thread, and described flat mouth coarse-pitch thread is provided with multiple ailhead relief hole; Described head of screw is connected with described shank of screw, and be provided with Double helix relief hole in the middle of described shank of screw, described Double helix relief hole is single hole, is arranged on described shank of screw, and communicates with screw core bore between described Double helix relief hole in bifilar helix mode; Described shank of screw and described screw WEILIAN connect, and described screw tail periphery is provided with reducing fine thread and spherical caudal knot, and described reducing fine thread is provided with nail tail relief hole, described nail tail relief hole is through hole; Described reducing fine thread diameter increases gradually, and is connected with described spherical caudal knot, and described spherical caudal knot is spherical, and coordinates ball-type pad to be fixed, and effectively can prevent from using exertin and the excessive pressurization that produces.
Described ailhead relief hole is through hole, and be interspersed in 120 degree of angles between described ailhead relief hole setting.
Described Double helix relief hole at least arranges 6, and the angular range between adjacent Double helix relief hole is 15 degree of-120 degree.
Described ailhead relief hole is at least provided with 4, and described nail tail relief hole is at least provided with 2.
Pass through technique scheme, the beneficial effect of technical solutions of the utility model is: adopt the Double helix relief hole arranging double helical bore distribution on nail bar, also relief hole is arranged to ailhead and nail tail simultaneously, thus effectively reduce the side effect of intra-osteal pressure, thus make the reduction of the fracture thorough, shorten healing time, decrease patient suffering, improve success rate of operation; The hollow design of described screw core bore, is conducive to guide pin guiding and implants, and when screw afterbody touches bone block, described spherical caudal knot design effectively stops Overexertion, and when sphere fully contacts with bone block, pressurized operation terminates, facilitating operation, fast.
Accompanying drawing explanation
In order to be illustrated more clearly in this utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 lets out hole cannulated compression screw structural representation for a kind of Double helix disclosed in this utility model embodiment.
Numeral and the corresponding component title represented by letter in figure:
1. head of screw 2. shank of screw 3. screw tail 4. self tapping mouth
5. flat mouth coarse-pitch thread 6. screw core bore 7. Double helix relief hole 8. reducing fine thread
9. spherical caudal knot 10. inner hexagonal hole 11. ailhead relief hole 12. follows closely tail relief hole
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, be clearly and completely described the technical scheme in this utility model embodiment, obviously, described embodiment is only this utility model part embodiment, instead of whole embodiments.Based on the embodiment in this utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of this utility model protection.
According to Fig. 1, this utility model provides a kind of Double helix and lets out hole cannulated compression screw, comprises head of screw 1, shank of screw 2, screw tail 3, self tapping mouth 4, flat mouth coarse-pitch thread 5, screw core bore 6, Double helix relief hole 7, reducing fine thread 8, spherical caudal knot 9, inner hexagonal hole 10, ailhead relief hole 11, nail tail relief hole 12.
Described Double helix is let out hole cannulated compression screw and is made up of head of screw 1, shank of screw 2, screw tail 3, and described head of screw 1, shank of screw 2, screw tail 3 are by the processing and manufacturing of metal bar one; Described Double helix is let out hole cannulated compression screw axial centre and is provided with screw core bore 6, and described screw core bore 6 runs through described head of screw 1, shank of screw 2, screw tail 3, and described screw core bore 6 afterbody is provided with inner hexagonal hole 10; Described head of screw 1 tip is provided with self tapping mouth 4, and described head of screw 1 periphery is provided with flat mouth coarse-pitch thread 5, and described flat mouth coarse-pitch thread 5 is provided with multiple ailhead relief hole 11; Described head of screw 1 is connected with described shank of screw 2, Double helix relief hole 7 is provided with in the middle of described shank of screw 2, described Double helix relief hole 7 is single hole, is arranged on described shank of screw 2, and communicates with screw core bore 6 between described Double helix relief hole 7 in bifilar helix mode; Described shank of screw 2 is connected with described screw tail 3, and described screw tail 3 periphery is provided with reducing fine thread 8 and spherical caudal knot 9, and described reducing fine thread 8 is provided with nail tail relief hole 12, described nail tail relief hole 12 is through hole; Described reducing fine thread 8 diameter increases gradually, and is connected with described spherical caudal knot 9, and described spherical caudal knot 9 is spherical, and coordinates ball-type pad to be fixed, and effectively can prevent from using exertin and the excessive pressurization that produces.
Described ailhead relief hole 11 is through hole, and be interspersed in 120 degree of angles between described ailhead relief hole 11 setting.
Described Double helix relief hole 7 arranges 24, and the angle between adjacent Double helix relief hole 7 is 30 degree.
Described ailhead relief hole 11 is provided with 6, and described nail tail relief hole 12 is provided with 2.
Described Double helix lets out hole cannulated compression screw, hollow screw core bore 6, two screw thread reducing, relief hole 7 and spherical caudal knot 9 design, effectively prevent from using exertin and the excessive pressurization that produces, the synchronzed press to fractured bones block can be realized, thus fractured bones block is better resetted; Hollow design, can be screwed in by guide pin guiding, screwing in of the present utility model while, utilize the relief hole of head and tailing screw flight, automatically realize the intrinsic pressure release of fracture site, make bone block active homing; When this utility model afterbody touches bone block, the spherical designs of afterbody effectively stops Overexertion, and when sphere fully contacts with bone block, pressurized operation terminates, facilitating operation, fast, decreases the misery of patient.
By above-mentioned specific embodiment, the beneficial effects of the utility model are: adopt the relief hole arranging double helical bore distribution on nail bar, also relief hole is arranged to ailhead and nail tail simultaneously, thus effectively reduce the side effect of intra-osteal pressure, thus make the reduction of the fracture thorough, shorten healing time, decrease patient suffering, improve success rate of operation; The hollow design of described screw core bore, is conducive to guide pin guiding and implants, and when screw afterbody touches bone block, described spherical caudal knot design effectively stops Overexertion, and when sphere fully contacts with bone block, pressurized operation terminates, facilitating operation, fast.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses this utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, this utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (4)
1. a Double helix lets out hole cannulated compression screw, it is characterized in that, comprise head of screw, shank of screw, screw tail, self tapping mouth, flat mouth coarse-pitch thread, screw core bore, Double helix relief hole, reducing fine thread, spherical caudal knot, inner hexagonal hole, ailhead relief hole, nail tail relief hole; Described Double helix is let out hole cannulated compression screw and is made up of head of screw, shank of screw, screw tail, and described head of screw, shank of screw, screw tail are by the processing and manufacturing of metal bar one; Described Double helix is let out hole cannulated compression screw axial centre and is provided with screw core bore, and described screw core bore runs through described head of screw, shank of screw, screw tail, and described screw core bore afterbody is provided with inner hexagonal hole; Described head of screw tip is provided with self tapping mouth, and described head of screw periphery is provided with flat mouth coarse-pitch thread, and described flat mouth coarse-pitch thread is provided with multiple ailhead relief hole; Described head of screw is connected with described shank of screw, and be provided with Double helix relief hole in the middle of described shank of screw, described Double helix relief hole is single hole, is arranged on described shank of screw, and communicates with screw core bore between described Double helix relief hole in bifilar helix mode; Described shank of screw and described screw WEILIAN connect, and described screw tail periphery is provided with reducing fine thread and spherical caudal knot, and described reducing fine thread is provided with nail tail relief hole, described nail tail relief hole is through hole; Described reducing fine thread diameter increases gradually, and is connected with described spherical caudal knot, and described spherical caudal knot is spherical, and coordinates ball-type pad to be fixed, and effectively can prevent from using exertin and the excessive pressurization that produces.
2. a kind of Double helix according to claim 1 lets out hole cannulated compression screw, it is characterized in that, described ailhead relief hole is through hole, and be interspersed in 120 degree of angles between described ailhead relief hole setting.
3. a kind of Double helix according to claim 1 lets out hole cannulated compression screw, it is characterized in that, described Double helix relief hole at least arranges 6, and the angular range between adjacent Double helix relief hole is 15 degree-120 degree.
4. a kind of Double helix according to claim 1 lets out hole cannulated compression screw, it is characterized in that, described ailhead relief hole is at least provided with 4, and described nail tail relief hole is at least provided with 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520605940.3U CN204971551U (en) | 2015-08-12 | 2015-08-12 | Hollow compression screw in hole is let out to double helix |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520605940.3U CN204971551U (en) | 2015-08-12 | 2015-08-12 | Hollow compression screw in hole is let out to double helix |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204971551U true CN204971551U (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520605940.3U Active CN204971551U (en) | 2015-08-12 | 2015-08-12 | Hollow compression screw in hole is let out to double helix |
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| Country | Link |
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| CN (1) | CN204971551U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106730072A (en) * | 2017-03-15 | 2017-05-31 | 四川大学 | Pressure release nail in bone |
| CN108703796A (en) * | 2018-06-08 | 2018-10-26 | 创美得医疗器械（天津）有限公司 | Explosion-proof compressive hollow screw without a head |
-
2015
- 2015-08-12 CN CN201520605940.3U patent/CN204971551U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106730072A (en) * | 2017-03-15 | 2017-05-31 | 四川大学 | Pressure release nail in bone |
| CN106730072B (en) * | 2017-03-15 | 2023-08-11 | 四川大学 | Pressure relief nail in bone |
| CN108703796A (en) * | 2018-06-08 | 2018-10-26 | 创美得医疗器械（天津）有限公司 | Explosion-proof compressive hollow screw without a head |
| WO2019242300A1 (en) * | 2018-06-08 | 2019-12-26 | 创美得医疗器械（天津）有限公司 | Anti-burst headless compression hollow screw |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |