Interference screw for department of orthopaedics

An extrusion screw, orthopedic technology, applied in the field of medical devices, can solve problems such as the lack of tight fixation of the tendon, affecting the tendon-bone recovery, and the mechanical properties of the tendon graft. The effect of strong pressure and position retention ability and convenient early functional rehabilitation exercise

CN104173095AActive Publication Date: 2014-12-03GUANGDONG HONGZHI BIOTECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2014-12-03

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Abstract

The invention provides an interference screw for the department of orthopaedics. The interference screw for the department of orthopaedics comprises a head end, a threaded section and a tail end, wherein the head end, the threaded section and the tail end are fixedly connected in sequence; the outer surface of the head end and the outer surface of the tail end are smooth. The interference screw for the department of orthopaedics aims to overcome the defects in the prior art, is used for rebuilding and restoring an articular ligament, enhances connection firmness, reduces the cutting effect on muscle tendons and improves the treatment effect on the rebuilt ligament.
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Description

technical field

[0001] The invention relates to the technical field of medical instruments, in particular to an extrusion screw. Background technique

[0002] Cruciate ligament injury is one of the most common and serious sports injuries. A torn cruciate ligament can cause joint instability. Improper treatment can lead to knee joint instability, secondary articular cartilage damage, and eventually osteoarthropathy, which seriously affects the knee joint. Joint function, resulting in limited daily activities of patients, and gradually lead to a decline in self-care ability and loss of self-confidence. Extrusion screws are used for arthroscopic cruciate ligament repair to fix the tendon in the bone tunnel and ensure the healing of the tendon.

[0003] At present, the extrusion screw products used in China are generally titanium alloy screws or absorbable screws. These products mainly include:

[0004] One is the flaw of the treatment method. The treatment methods for crucia...

Examples

Embodiment Construction

[0037] like figure 1 , figure 2 , image 3 As shown in the figure, an orthopedic extruded screw includes a head end 1, a threaded section 2, and a tail end 3, and the head end 1, the threaded section 2, and the tail end 3 are fixedly connected in sequence; the head end 1 and the tail end 3 The outer surface is smooth; the end face 13 of the head end 1 and the circumferential surface 14 use a rounded corner 11 to transition, or a chamfer; the bottom of the tail end 3 is passivated to form a platform 31; the head end 1, the threaded section 2 and the The tail end 3 is integrally formed; the head end 1 is a cylindrical shape 12; the tail end 3 is a truncated cone shape 32; The radius is the same; the minimum radius of the thread segment 2 is the same as the maximum radius of the tail end 3; the thread of the thread segment 2 adopts a zigzag thread 21, and the cross section of the thread 22 of the zigzag thread is an isosceles trapezoid. The corners 23 on both sides adopt rou...