Fixed-angle-rotation-center-parallel external fixator for malformation correction of shinbone

Abstract

The invention relates to a fixed-angle-rotation-center-parallel external fixator for malformation correction of a shinbone. The external fixator comprises a proximal cycle, a distal cycle, a front branched chain and a rear branched chain, wherein the rear branched chain is composed of two side bars, a C-shaped ring and a short branched chain. The upper part of the short branched chain is connectedwith the C-shaped ring to form a first revolving pair, and the C-shaped ring is connected with the two side bars to form a second revolving pair. During the malformation correction, axes of rotationof the first and second revolving pairs are converged to an angle center of rotation of a malformed bone, and then, a center of rotation of the external fixator and the angle center of rotation of themalformed bone can be superposed, so that doctors can conveniently observe clinical conditions of the current malformation correction in real time, and radiation intake resulting from X-ray film photographing is reduced. According to the external fixator, rotating deformity of two degrees of freedom of the malformed bone can be corrected, shortened malformation along a bone axis direction can also be corrected, and then, the malformed bone can be subjected to two-rotation-one-moving spatial 3-degree-of-freedom malformation correction.

Description

technical field [0001] The invention relates to an orthopedic parallel external fixator, in particular to a fixed-angle rotation center parallel external fixator for tibial deformity correction. Background technique [0002] External fixator is widely used in orthopedic surgery based on distraction osteogenesis technology. It is a minimally invasive tool with small trauma and wide indications. It provides stable and elastic fixation in the process of limb fracture reduction and deformity correction. Currently, the most commonly used external fixators for the correction of tibial deformities are Iraqi external fixators and Taylor external fixators. Among them, the Iraqi external fixator has many components, and each correction requires clinicians to configure corresponding configurations according to different indications. Clinicians need to have rich clinical experience. In practical applications, there are many components and the structure is more complicated. The Taylor e...

AI Technical Summary

Problems solved by technology

Among them, there are many components of the Iraqi external fixator, and each correction requires clinicians to configure corresponding configurations according to different indications. Clinicians need to have rich clinical experience. In practical applications, there are many components and the structure is more complicated.

The Taylor external fixator has 6 degrees of freedom in space and can correct any three-dimensional deformity, but it has a large structure and many branches, and the process of solving the correction prescription for the adjustment of the rod is more complicated

At the same time, in the actual tibial deformity, not all deformities require the ability of the external fixator to correct the deformity with 6 degrees of freedom. If the degree of freedom of the external fixator exceeds the real degree of freedom required for deformity correction, this will lead to external The fixer has redundant degrees of freedom, and this redundant degree of freedom leads to a complex path optimization process, which in turn produces a complex adjustment process

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