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Bone fixation system

A fixation system and femoral neck technology, applied in the field of bone fixation systems, can solve the problems of lack of femoral neck lower wall support and shear force, high fracture nonunion rate, high femoral head necrosis rate, etc., to facilitate fracture healing and reduce Effects of radiation damage and fewer fluoroscopy times

Pending Publication Date: 2020-03-27
王建华
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Problems solved by technology

However, for Pauwels III fractures, there are still problems of lack of support and shear force on the inferior wall of the femoral neck, such as image 3 shown
[0004] For Pauwels type III fractures, none of the internal fixation methods in the prior art can resist the shear force of the fracture end to achieve stable fixation. After surgery, the fracture fixation is not firm, the redisplacement rate is high, the fracture nonunion rate is high, and femoral head necrosis high rate problem

Method used

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Embodiment Construction

[0042] Figure 4 An exemplary embodiment of a bone fixation system according to the invention is shown. The bone fixation system according to the invention comprises: a component 1, such as a rod with a hollow structure; a shear-resistant member 2, such as a screw; and an anti-rotation member 3, such as a screw. The role of component 1 is to maintain fracture reduction and improve angulation stability during implant placement. Such as Figure 4 As shown, the component 1 is in a cylindrical shape, but it can also be in other shapes according to actual needs. The hollow structure provides a channel for the guide needle when inserted, and has a hollow channel with a diameter of about 2.5mm, such as Figure 10 shown. The part 1 has a lumen 5 extending at least a certain distance from its proximal end to its distal end. Part 1 also has channels 6 . Channel 6 communicates with chamber 5 and extends to the outer surface of component 1 . The channel 6 is configured for slidably...

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Abstract

The invention discloses a component of a bone fixation system for a femoral neck. The component has a channel for receiving an anti-rotation member and a through hole for receiving an anti-shear member, the through hole is closer to a distal end of the component than the channel, and an axis of the through hole is not in the same plane as an axis of the channel. The invention also discloses a bonefixation system comprising the component. The bone fixation system is easy to implant, provides angular stability and provides adequate support for the fractured ends.

Description

technical field [0001] The invention relates to a bone fixation system, especially a bone fixation system for femoral neck fractures, especially a bone fixation system suitable for Pauwels III femoral neck fractures. Background technique [0002] In daily life, femoral neck fractures occur frequently. Such as figure 1 As shown, femoral neck fractures are divided into three types according to the angle between the fracture end and the horizontal direction: Pauwels type I, type II and type III fractures. For patients with femoral neck fractures, surgical internal fixation is one of the main treatment methods at present. Existing internal fixation methods include cannulated screws, dynamic hip screws (Dynamic Hip Screw, DHS), nail plates, and the like. These internal fixation methods can solve Pauwels type I and type II fractures well. However, Pauwels III femoral neck fractures have become a difficult orthopedic disease due to mechanical instability. [0003] See Chinese ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/74A61B17/72A61B17/86
CPCA61B17/725A61B17/74A61B17/8625
Inventor 王建华
Owner 王建华
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