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Interface screw

An interface screw and blade technology, applied in the field of medical devices, can solve the problems of ligament fatigue failure, easy deformation or fracture, insufficient fixation strength and creep resistance, etc., and achieves the effect of firm screw fixation and not easy to fall off.

Pending Publication Date: 2020-09-25
GUANGZHOU SUN SHING BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fixing strength and creep resistance of the current commercially available interface screws are still insufficient.
[0003] The interface screw has the following problems: the interface screw is a hollow conical screw, and its nail head is thin, and it is easy to deform or break under the action of torsion during the screw-in process; when the interface screw is screwed in again and the knee joint reciprocates, it will cause damage to the ligament. Shearing force makes the ligament prone to fatigue failure; the degradation time of the absorbable interface screw does not coincide with the bone ingrowth time, resulting in insufficient bone density and complications after surgical rehabilitation

Method used

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  • Interface screw

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Embodiment Construction

[0018] The invention provides an interface screw, which improves the structure of the existing interface screw and adds a sheath tube with holes, so as to prevent the cutting force on the ligament when the screw is implanted.

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] Such as figure 1 As shown, the sheath consists of:

[0021] The sheath bottom 2 is located at the bottom of the sheath tube, and the sheath bottom 2 is provided with a through hole for the penetration of the ligament and the pen...

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PUM

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Abstract

The invention provides an interface screw which improves the structure of an existing interface screw and is additionally provided with a porous sheathing canal so as to prevent ligament cutting forcewhen the screw is implanted. The interface screw is characterized in that the interface screw penetrates through the sheathing canal. The sheathing canal comprises: a sheathing bottom which is located at the bottom of the sheathing canal, wherein a through hole allowing the interface screw to penetrate through is formed in the sheathing bottom; and blades which are connected to the sheath bottom.Each blade is provided with a sheath hole and anti-skid lines, the sheath hole is located in the upper end, away from the sheath bottom, of each blade, the anti-skid lines are distributed on each blade in a sawtooth shape, and the anti-skid lines incline in the direction away from the sheath bottom.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an interface screw. Background technique [0002] The interface screw is used for ACL (knee cruciate ligament) reconstruction, and plays the role of fixing the ligament during the operation. The reciprocating motion of the knee joint will make the interface screw have a continuous outward creeping tendency, so the fixation strength and creep resistance of the interface screw Particularly important. However, the fixing strength and creep resistance of the currently available interface screws are still insufficient. [0003] The interface screw has the following problems: the interface screw is a hollow conical screw, and its nail head is thin, and it is easy to deform or break under the action of torsion during the screw-in process; when the interface screw is screwed in again and the knee joint reciprocates, it will cause damage to the ligament. The shear force makes the ligament...

Claims

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Application Information

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IPC IPC(8): A61B17/86A61B90/00B29C43/16B29C43/58B29C45/78
CPCA61B17/8625A61B17/866A61B90/08B29C43/16B29C43/58B29C45/78A61B2017/8655A61B2017/00831A61B2017/0088A61B2017/00526A61B2090/08021B29C2043/5816B29C2945/76531
Inventor 金振华杨习锋曾晨光
Owner GUANGZHOU SUN SHING BIOTECH CO LTD
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