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首页> 外文期刊>International journal for numerical methods in biomedical engineering >Influence of parameter deviation on the closeness of the tibial limb and external fixator based on a novel collision detection algorithm
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Influence of parameter deviation on the closeness of the tibial limb and external fixator based on a novel collision detection algorithm

机译：参数偏差对基于新型碰撞检测算法的胫骨肢和外固定器近距离的影响

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摘要

The Ortho-SUV frame (OSF) is a hexapod external fixator widely applied in orthopedics deformity correction. The possibility of collision between OSF's struts and the soft tissue is an essential but overlooked issue. To avoid the issue, a novel collision detection algorithm is established based on a cone-cylinder model of the tibial limb-strut interaction for detecting the closeness of the tibial limb and external fixator. The algorithm is constructed using the vector analysis based on the model of the minimum distance between the truncated cone generatrix and the cylinder axis. The motion simulation is performed on the overall alignment through the Solidworks-motion module to verify the feasibility of the algorithm. Subsequently, the installation parameter deviations of the bone-fixator system are described to investigate the influence of orientation and position deviation on the closeness of the tibial limb and external fixator through the numerical method. The investigation results show that the orientation deviation gamma (around the z-axis), the position deviation tau(1) and tau(2) (along the x and y-axes, respectively) have greater sensitivity to closeness and the influence of multiple deviations on the closeness has the property of superposition. The proposed algorithm can assist clinicians to strictly design and appraise frame configurations prior to their application to avoid the collision between the external fixator and the limbs during the correction. It has great application significance in the development of computer-aided correction software.
机译：Ortho-SUV框架（OSF）是骨架外部固定器，广泛应用于骨科畸形校正。 OSF的支柱和软组织之间的可能性是一个必不可少的但忽视的问题。为避免该问题，基于胫骨肢 - 支柱相互作用的锥缸模型建立了一种新的碰撞检测算法，用于检测胫骨肢和外固定器的近距离。基于截头锥形圆锥轴和汽缸轴线之间的最小距离模型，使用载体分析构造算法。通过SolidWorks-Motion-Motion模块的总对准执行运动模拟，以验证算法的可行性。随后，描述了骨固定器系统的安装参数偏差来研究方向和位置偏差在胫骨肢和外固定器的近距离通过数值方法的影响。调查结果表明，取向偏差伽马（Z轴周围），位置偏差Tau（1）和Tau（2）（分别沿X和Y轴）对接近度和倍数的影响有更多的敏感性接近的偏差具有叠加的性质。该算法可以帮助临床医生在应用之前严格设计和评估框架配置，以避免在校正期间外固定器和肢体之间的碰撞。它对计算机辅助校正软件的开发具有很大的应用意义。

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