CN202069679U - Bone screw - Google Patents

Bone screw Download PDF

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Publication number
CN202069679U
CN202069679U CN2011201670445U CN201120167044U CN202069679U CN 202069679 U CN202069679 U CN 202069679U CN 2011201670445 U CN2011201670445 U CN 2011201670445U CN 201120167044 U CN201120167044 U CN 201120167044U CN 202069679 U CN202069679 U CN 202069679U
Authority
CN
China
Prior art keywords
screw
bone screw
groove
nut
bone
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
Application number
CN2011201670445U
Other languages
Chinese (zh)
Inventor
初海滨
鞠传宝
姜秀娟
殷泽刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Wendeng Osteopathy Hospital
Original Assignee
Shandong Wendeng Osteopathy Hospital
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 Shandong Wendeng Osteopathy Hospital filed Critical Shandong Wendeng Osteopathy Hospital
Priority to CN2011201670445U priority Critical patent/CN202069679U/en
Application granted granted Critical
Publication of CN202069679U publication Critical patent/CN202069679U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to the technical field of medical instruments, in particular to a bone screw, which is provided with a screw nut and a screw rod, wherein the screw rod is provided with threads. The bone screw is characterized in that the screw nut is cylindrical; the edge of the screw nut is shaped like an obtuse angle; the two sides of the end surface of the screw nut along the axis are symmetrically provided with positioning grooves; the two sides of the lower end of each positioning groove are respectively provided with a forward screwing groove and a reverse unscrewing groove; and the positioning grooves are respectively communicated with the forward screwing grooves and the reverse unscrewing grooves. In the bone screw, due to the adoption of the structure, the problems that the transferred torque is less when the bone screw is fixed, and the bone screw is easy to slide when being taken out, and is hard to take out are solved. The bone screw has the advantages that the structure is novel, the use is convenient, the transferred torque is large, the sliding is avoided, the time and the labor are saved, the surgery is fast, the operation is safe and a patient has little pain, and the like.

Description

Bone screw
Technical field
This utility model relates to technical field of medical instruments, specifically a kind of bone screw.
Background technology
The existing bone screw that is used for clinical fixedly fracture is made up of screw rod and nut, screw tip is connected with fixed by nut, screw rod is provided with screw thread, nut is hemispherical, the top is provided with interior hexagonal groove, screw thread on the screw rod has two-way drive characteristic again simultaneously, automatically move back the nail phenomenon for fear of what screw produced under the stress of physical activity, usually the orthopedist can firmly fix screw-driving, fixedly the time, easily bone screw is fixed, after patient's union of fracture, also need second operation, the bone screw that is fixed on fracture site is taken out, when taking out, because the bone screw of internal fixation is less relatively, the thickness of nut head is thinner relatively, set interior hexagonal groove is more shallow relatively less, causes turning screw with screwdriver and makes the moment of transmission less, and form skidding easily, thereby cause and get the nail failure, this is had clinically the drill bit of use the screw head of a nail is bored, take off steel plate, reuse is hollow to drill through screw, also useful flat type high-speed steel is squeezed into screw head of a nail internal rotation and is taken out, these methods are bigger to patient trauma, cause operating time to prolong, and also increased patient's misery simultaneously.
Summary of the invention
The purpose of this utility model is to solve above-mentioned the deficiencies in the prior art, provide a kind of novel structure, easy to use, carry-over moment is big, time saving and energy saving, operating time weak point, handling safety, the little bone screw of patient suffering.
The technical scheme that its technical problem that solves this utility model adopts is:
A kind of bone screw, be provided with nut and screw rod, screw rod is provided with screw thread, it is characterized in that nut is cylindrical, and the edge of nut in obtuse angle, the nut end face is provided with locating slot along the axis lateral symmetry, both sides, locating slot lower end are respectively equipped with forward and screw groove and oppositely unscrew groove, locating slot screws groove and oppositely unscrews groove with forward respectively and is connected, so that screwdriver when taking out screw the counteracting force of carrying block face and lateral locating surface through oppositely unscrewing the groove upper end screw is screwed out fast, guaranteed screw non-slip phenomenon when taking out, to reach carry-over moment big, handling safety, time saving and energy saving effect.
This utility model is owing to adopt said structure, the moment of having transmitted when having solved fixed bone screw is little, the problem of skidding easily when taking out bone screw and being difficult for taking out, have novel structure, easy to use, carry-over moment is big, non-slip, time saving and energy saving, advantage such as operation is quick, handling safety, patient suffering are little.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the cutaway view of A-A among Fig. 1.
Reference numeral: nut 1, screw rod 2, screw thread 3, locating slot 4, forward screw groove 5, oppositely unscrew groove 6.
The specific embodiment:
Below in conjunction with accompanying drawing this utility model is further specified:
As shown in drawings, a kind of bone screw, be provided with nut 1 and screw rod 2, fixedly connected with nut 1 in screw rod 2 tops, screw rod 2 is provided with screw thread 3, it is characterized in that nut 1 is cylindrical, and the edge of nut 1 in obtuse angle, nut 1 end face is provided with locating slot 4 along the axis lateral symmetry, both sides, locating slot 4 lower end are respectively equipped with forward and screw groove 5 and oppositely unscrew groove 6, locating slot 4 screws groove 5 and oppositely unscrews groove 6 with forward respectively and is connected, so that screwdriver lifts screw is screwed out fast in the location of carrying block face and lateral locating surface through oppositely unscrewing the groove upper end when taking out screw, guaranteed the phenomenon that screw can not skid when taking out, had to carry-over moment big, handling safety, time saving and energy saving effect.
This utility model is when clinical practice, this utility model need be used special-purpose bone screw screwdriver, by the special-purpose screwdriver of bone screw the awl tooth insert through locating slot 4, by with the bone screw axis being the special-purpose screwdriver of center rotation bone screw, the forward that makes the awl tooth prop up the axis both sides screws the press surface and the lateral locating surface of groove 5 lower ends, screw the very fast precession fracture site of bone screw under the retroaction of the press surface of groove lower end and lateral locating surface at the forward that screwdriver imposes on bone screw, then the special-purpose screwdriver of bone screw is shifted out through locating slot 4 places.
When needing to take out bone screw after patient's the union of fracture, the awl tooth of the special-purpose screwdriver of bone screw is inserted into through locating slot 4 and oppositely unscrews in the groove 6, imposes at screwdriver that bone screw is very fast under the counteracting force of carrying block face and lateral locating surface that oppositely unscrews the groove upper end of bone screw screws out from fracture.
This utility model is owing to adopt said structure, the moment of having transmitted when having solved fixed bone screw is little, the problem of skidding easily when taking out bone screw and being difficult for taking out has novel structure, easy to use, advantage such as carry-over moment is big, non-slip, time saving and energy saving, operating time weak point, handling safety, patient suffering are little.

Claims (1)

1. bone screw, be provided with nut and screw rod, screw rod is provided with screw thread, it is characterized in that nut is cylindrical, and the edge of nut in obtuse angle, the nut end face is provided with locating slot along the axis lateral symmetry, and both sides, locating slot lower end are respectively equipped with forward and screw groove and oppositely unscrew groove, and locating slot screws groove and oppositely unscrews groove with forward respectively and is connected.
CN2011201670445U 2011-05-24 2011-05-24 Bone screw Expired - Fee Related CN202069679U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201670445U CN202069679U (en) 2011-05-24 2011-05-24 Bone screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201670445U CN202069679U (en) 2011-05-24 2011-05-24 Bone screw

Publications (1)

Publication Number Publication Date
CN202069679U true CN202069679U (en) 2011-12-14

Family

ID=45107800

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011201670445U Expired - Fee Related CN202069679U (en) 2011-05-24 2011-05-24 Bone screw

Country Status (1)

Country Link
CN (1) CN202069679U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105147383B (en) * 2015-10-28 2016-08-31 赵德伟 A kind of porous tantalum metal hollow screw and application thereof
WO2017071335A1 (en) * 2015-10-28 2017-05-04 赵德伟 Porous tantalum metal hollow screw and applications thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105147383B (en) * 2015-10-28 2016-08-31 赵德伟 A kind of porous tantalum metal hollow screw and application thereof
WO2017071335A1 (en) * 2015-10-28 2017-05-04 赵德伟 Porous tantalum metal hollow screw and applications thereof

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Legal Events

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: 20111214

Termination date: 20120524