CN202086565U - Slideable hollow self-tapping forcing screw - Google Patents

Slideable hollow self-tapping forcing screw Download PDF

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Publication number
CN202086565U
CN202086565U CN 201120149659 CN201120149659U CN202086565U CN 202086565 U CN202086565 U CN 202086565U CN 201120149659 CN201120149659 CN 201120149659 CN 201120149659 U CN201120149659 U CN 201120149659U CN 202086565 U CN202086565 U CN 202086565U
Authority
CN
China
Prior art keywords
screw
bar
nail
loop bar
hollow
Prior art date
Application number
CN 201120149659
Other languages
Chinese (zh)
Inventor
杨春喜
蔡郑东
李少华
刘杰
Original Assignee
上海市第十人民医院
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 上海市第十人民医院 filed Critical 上海市第十人民医院
Priority to CN 201120149659 priority Critical patent/CN202086565U/en
Application granted granted Critical
Publication of CN202086565U publication Critical patent/CN202086565U/en

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Abstract

The utility model relates to a slideable hollow self-tapping forcing screw. The screw is composed of a sleeve bar and a nailing bar, wherein the sleeve bar is a hollow metallic bar; the nailing bar is composed of an inner nailing cap, a slide bar and a threaded nailing bar; the slide bar is installed in the pore path of the sleeve bar and can slide in the same. In comparison with a common hollow forcing screw sold on the market, the slideable hollow self-tapping forcing screw not only achieves the purpose of forcing a bone fracture end during a screwing progress, but also forms secondary forcing effect by slide of the screw when a tension band is fixed; the screw is slidingly flexible, so that the sharp end of the screw does not cut a steel cable when the tension band of the steel cable is forced, as a result, danger of breakage of the steel cable and danger of bending of the screw are reduced.

Description

A kind of slip pressurizing self-tapping hollow screw

Technical field

This utility model relates to a kind of medical apparatus and instruments, specifically, is a kind of slip pressurizing self-tapping hollow screw.

Background technology

Patella is a sesamoid bone maximum in the human body, also is a kneed ingredient.Patella fracture is comparatively common, good being sent out in the middle age, account for human fracture's 1-2%, wherein transecting type and vertical shape fracture accounts for branch apoplexy due to endogenous wind 2/3, Therapeutic Method is a lot of at present, operative treatment is widely accepted, and ring like steel wire, Magnuson steel wire, tension band wire, AO tension band wire and improvement tension band wire internal fixation etc. are arranged, and adopting hollow forcing screw and tension band wire and D is the most frequently used method.But adopt this method to make the screw horizontal direction force, often bending easily, and the sharp keen tip of screw can produce dissection to wirerope, makes the wirerope fracture easily.

Chinese patent application CN2848150Y discloses a kind of internal fixation hollow nail for patella fracture, this utility model relates to the fixedly internal fixation hollow nail for patella fracture of usefulness of a kind of transverse fracture, establish the head of a nail at hollow nail body one end, the other end is established thread segment, it is characterized in that: the two ends tube wall homonymy at the nail body is provided with groove vertically, have in the fracture site pressurization, help the advantage of union of fracture.But yet there are no report about the slip pressurizing self-tapping hollow screw.

Summary of the invention

The purpose of this utility model is that a kind of slip pressurizing self-tapping hollow screw is provided.

For achieving the above object, the technical scheme that this utility model is taked is: a kind of slip pressurizing self-tapping hollow screw, described screw is made up of loop bar and nail bar, described loop bar is the metallic rod of a hollow, described nail bar is made up of the interior head of a nail, sliding bar and drive screw bar, sliding bar is installed in the loop bar duct, can slide in the loop bar duct.

Described drive screw bar is connected with sliding bar, and the drive screw bar is provided with the self-taped type screw thread.

Described nail bar runs through a nail bar duct along its axle center.

One end of described loop bar is provided with the loop bar head of a nail, and intermediary hollow channel is the loop bar duct, and the other end is provided with the loop bar internal ring, and the loop bar internal ring is the annular projection of the inwall of loop bar to loop bar duct direction.

The head of a nail is arranged on an end of sliding bar in described, and interior head of a nail periphery is provided with projection, and projection cooperates with the loop bar internal ring, and sliding bar can not skidded off from the loop bar duct.

The total length of described slip pressurizing self-tapping hollow screw is 20-60mm.

Described nail bar channel diameter 1.25-2.5mm.

Described cover shank diameter 5.0-7.0mm, the diameter of loop bar internal ring is 4.0-5.0mm.

Described drive screw shank diameter is 3.0-4.0mm, reach 15-17mm, diameter of thread 4.0-5.0mm.

Head of a nail depression in the head of a nail is provided with in described, described interior head of a nail groove can be hexagon, octagonal, quadrangle, triangle, in-line, cross, quincunx groove.

This utility model advantage is:

1, this utility model is compared with the common hollow forcing screw of selling in the market, not only reaches the purpose of fracture site pressurization in screw screw-in process, and can form the effect that secondary pressurizes at tension band because of screw slides fixedly the time;

2, make that the sharp keen tip of screw can not produce dissection to wirerope when row wirerope tension band was fixed pressurization because screw is slidably flexible, reduced the risk of wirerope fracture and the risk of screw bending.

Description of drawings

Accompanying drawing 1 is the cross-sectional view of a kind of pressurizing self-tapping hollow screw that slides of the present utility model.

Accompanying drawing 2 is right views of accompanying drawing 1.

The specific embodiment

Below in conjunction with embodiment and with reference to accompanying drawing this utility model is further described.

The Reference numeral and the ingredient that relate in the accompanying drawing are as follows:

1. loop bar 2. is followed closely bars

11. the loop bar head of a nail 12. loop bar internal ring

13. the head of a nail in the loop bar duct 21.

22. sliding bar 23. drive screw bars

24. head of a nail groove in the nail bar duct 211.

Please refer to accompanying drawing 1, accompanying drawing 1 is the cross-sectional view of a kind of pressurizing self-tapping hollow screw that slides of the present utility model.Described slip pressurizing self-tapping hollow screw is made up of loop bar 1 and nail bar 2.Described loop bar 1 is the metallic rod of a hollow, and an end of loop bar 1 is provided with the loop bar head of a nail 11, and intermediary hollow channel is loop bar duct 11, and the other end is provided with loop bar internal ring 12, and loop bar internal ring 12 is the annular projection of the inwall of loop bar 1 to loop bar duct 11 directions.Loop bar 1 diameter 5.0-7.0mm, the diameter of loop bar internal ring 12 is 4.0-5.0mm.Described nail bar 2 is made up of the interior head of a nail 21, sliding bar 22 and drive screw bar 23, runs through a nail bar duct 24 along the axle center of nail bar 2, described nail bar duct 24 diameter 1.25-2.5mm.Described sliding bar 22 is installed in the loop bar duct 11 of loop bar 1, can slide in loop bar duct 11, and screw of the present utility model can be extended and shorten.The interior head of a nail 21 is arranged on an end of sliding bar 22, and the interior head of a nail 21 peripheries are provided with projection, and projection cooperates with loop bar internal ring 12, and sliding bar 22 can not skidded off from loop bar duct 11.Described drive screw bar 23 is connected with sliding bar 22, and drive screw bar 23 is provided with the self-taped type screw thread.Described drive screw bar 23 diameters are 3.0-4.0mm, reach 15-17mm, diameter of thread 4.0-5.0mm.The total length scope of described slip pressurizing self-tapping hollow screw is 20-60mm.

Need to prove head of a nail depression 211 in the described interior head of a nail 21 is provided with.Please refer to accompanying drawing 2, accompanying drawing 2 is right views of accompanying drawing 1.Head of a nail groove 211 can be hexagon, octagonal, quadrangle, triangle, in-line, cross, quincunx groove in described, and instrument easy to use screws screw of the present utility model.

The using method of slip pressurizing self-tapping hollow screw of the present utility model:

At the Patella fracture open reduction of going ahead of the rest, screw in the hollow screw guide pin perpendicular to the Patella fracture line, C arm machine perspective position is good, and the slip pressurizing self-tapping hollow screw of appropriate length is selected in depth measurement, uses corresponding instrument to screw the pressurized fracture broken ends of fractured bone.Take out the guiding Kirschner wire, penetrate the tension band wirerope, the row tension band is fixed.

Slip pressurizing self-tapping hollow screw of the present utility model is compared with the common hollow forcing screw of selling in the market, not only in screw screw-in process, reach the purpose of fracture site pressurization, and can form the effect that secondary pressurizes because of screw slides fixedly the time at tension band.Simultaneously, make that the sharp keen tip of screw can not produce dissection to wirerope when row wirerope tension band was fixed pressurization because screw is slidably flexible, reduced the risk of wirerope fracture and the risk of screw bending, we claim slidably flexible screw to have the effect of evading.

The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from this utility model principle; can also make some improvement and replenish, these improvement and replenish and also should be considered as protection domain of the present utility model.

Claims (10)

1. a slip pressurizing self-tapping hollow screw is characterized in that, described screw is made up of loop bar and nail bar, described loop bar is the metallic rod of a hollow, described nail bar is made up of the interior head of a nail, sliding bar and drive screw bar, and sliding bar is installed in the loop bar duct, can slide in the loop bar duct.
2. screw according to claim 1 is characterized in that, described drive screw bar is connected with sliding bar, and the drive screw bar is provided with the self-taped type screw thread.
3. screw according to claim 1 is characterized in that, described nail bar runs through a nail bar duct along its axle center.
4. screw according to claim 1 is characterized in that, an end of described loop bar is provided with the loop bar head of a nail, and intermediary hollow channel is the loop bar duct, and the other end is provided with the loop bar internal ring, and the loop bar internal ring is the annular projection of the inwall of loop bar to loop bar duct direction.
5. screw according to claim 1 is characterized in that, the described interior head of a nail is arranged on an end of sliding bar, and interior head of a nail periphery is provided with projection, and projection cooperates with the loop bar internal ring, and sliding bar can not skidded off from the loop bar duct.
6. screw according to claim 1 is characterized in that, the total length of described slip pressurizing self-tapping hollow screw is 20-60mm.
7. screw according to claim 1 is characterized in that, described nail bar channel diameter 1.25-2.5mm.
8. screw according to claim 1 is characterized in that, described cover shank diameter 5.0-7.0mm, and the diameter of loop bar internal ring is 4.0-5.0mm.
9. screw according to claim 1 is characterized in that, described drive screw shank diameter is 3.0-4.0mm, reach 15-17mm, diameter of thread 4.0-5.0mm.
10. screw according to claim 1 is characterized in that, head of a nail depression in the described interior head of a nail is provided with, and described interior head of a nail groove can be hexagon, octagonal, quadrangle, triangle, in-line, cross, quincunx groove.
CN 201120149659 2011-05-12 2011-05-12 Slideable hollow self-tapping forcing screw CN202086565U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201120149659 CN202086565U (en) 2011-05-12 2011-05-12 Slideable hollow self-tapping forcing screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201120149659 CN202086565U (en) 2011-05-12 2011-05-12 Slideable hollow self-tapping forcing screw

Publications (1)

Publication Number Publication Date
CN202086565U true CN202086565U (en) 2011-12-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201120149659 CN202086565U (en) 2011-05-12 2011-05-12 Slideable hollow self-tapping forcing screw

Country Status (1)

Country Link
CN (1) CN202086565U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102657552A (en) * 2012-06-05 2012-09-12 叶立民 Inhaul cable pressurizing cylinder sleeve and pressurization fixing device for patellar fracture
CN102871721A (en) * 2012-10-26 2013-01-16 王永红 Sacrum female and male hollow pressurizing screw
CN104469649A (en) * 2013-09-25 2015-03-25 索尼公司 Packaging part and method of microphone and electronic equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102657552A (en) * 2012-06-05 2012-09-12 叶立民 Inhaul cable pressurizing cylinder sleeve and pressurization fixing device for patellar fracture
CN102871721A (en) * 2012-10-26 2013-01-16 王永红 Sacrum female and male hollow pressurizing screw
CN104469649A (en) * 2013-09-25 2015-03-25 索尼公司 Packaging part and method of microphone and electronic equipment

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111228

Termination date: 20140512