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Orthopedic elastic fixing rod

An elastic rod, orthopedic technology, applied in the direction of fixator, medical science, surgery, etc., can solve the problems of stress shielding, refracture, low elastic modulus, etc.

Inactive Publication Date: 2018-11-13
齐克海
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In orthopedic fixation, the rod structure is a commonly used structure, such as the nail-rod system of the spine, the bridging system of the trauma, the connecting rod of the external fixator, etc. It has the advantages of high structural strength, not easy to fatigue and fracture, and easy to plastic. No elasticity, easy to cause stress shielding
At the same time, it is currently believed that stress shielding due to the low elastic modulus of the fixation material is one of the main reasons for bone nonunion or low bone strength after fracture healing and prone to refracture.
Therefore, there is still a lack of an orthopedic fixation structure with sufficient structural strength and elasticity to avoid stress shielding.

Method used

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Embodiment Construction

[0008] Such as figure 1 As shown, the elastic rod is composed of a rod body (1) and a hollow butterfly structure (2) surrounded by the middle part. Because the middle part is a hollow butterfly structure (2), take the bridging system with a fixed fracture as an example. After the fracture is fixed, under the stress of gravity or muscle contraction, the two ends of the hollow butterfly structure (2) will move downward center closer. Because the middle is a hollow butterfly structure (2), it is an elastic structure in terms of structural mechanics, so it avoids stress shielding, facilitates the growth of callus at the fracture end, and at the same time enhances the bone strength after fracture healing.

[0009] figure 2 It is a schematic diagram of the elastic rod as a half-butterfly structure. The middle part is a half-butterfly hollow structure (3). The structure (3) is as elastic as the hollow structure (2). It is mainly used for double-rod fixation and other structures....

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Abstract

In order to solve the problem that a prior orthopedic fixing rod structure lacks elasticity, which easily generates stress shieling, an orthopedic fixating rod is designed. On the basis of the singlerod structure of the prior orthopedic fixing rod, a hollow, butterfly-shaped or semi-butterfly-shaped structure is designed on an elastic fixing part, so that the fixing rod has elasticity in structural mechanics, and meanwhile the structural strength of the rod is not reduced.

Description

technical field [0001] The design belongs to a kind of surgery, especially orthopedic fixation consumables. Background technique [0002] In orthopedic fixation, the rod structure is a commonly used structure, such as the nail-rod system of the spine, the bridging system of the trauma, the connecting rod of the external fixator, etc. It has the advantages of high structural strength, not easy to fatigue and fracture, and easy to plastic. No elasticity, easy to cause stress shielding. At the same time, it is currently believed that the stress shielding caused by the low elastic modulus of the fixation material is one of the main reasons for nonunion or low bone strength after fracture healing and prone to refracture. Therefore, there is still a lack of an orthopedic fixation structure with sufficient structural strength and elasticity to avoid stress shielding. Contents of the invention [0003] In order to solve the problem that the current orthopedic fixation rod struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/58
CPCA61B17/58A61B2017/564
Inventor 齐克海
Owner 齐克海
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