A finite element model of human hindfoot and its application in supramalleolar osteotomy

IF 1.4 3区医学 Q4 ENGINEERING, BIOMEDICAL

Clinical Biomechanics Pub Date : 2024-05-01 DOI:10.1016/j.clinbiomech.2024.106257

Shuai Wang , Junzhe Gao , Liangpeng Lai , Xiaojing Zhang , Xiaofeng Gong , Heng Li , Yong Wu

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引用次数: 0

Abstract

Background

The majority of the ankle osteoarthritis cases are posttraumatic and affect younger patients with a longer projected life span. Hence, joint-preserving surgery, such as supramalleolar osteotomy becomes popular among young patients, especially those with asymmetric arthritis due to alignment deformities. However, there is a lack of biomechanical studies on postoperative evaluation of stress at ankle joints. We aimed to construct a verifiable finite element model of the human hindfoot, and to explore the effect of different osteotomy parameters on the treatment of varus ankle arthritis.

Methods

The bones of the hindfoot are reconstructed using normal CT tomography data from healthy volunteers, while the cartilages and ligaments are determined from the literature. The finite element calculation results are compared with the weight-bearing CT(WBCT) data to validate the model. By setting different model parameters, such as the osteotomy height (L) and the osteotomy distraction distance (h), the effects of different surgical parameters on the contact stress of the ankle joint surface are compared.

Findings

The alignment and the deformation of hindfoot bones as determined by the finite element analysis aligns closely with the data obtained from WBCT. The maximum contact stress of the ankle joint surface calculated by this model increases with the increase of the varus angle. The maximum contact stresses as a function of the L and h on of the ankle joint surface are determined.

Interpretation

The relationship between surgical parameters and stress at the ankle joint in our study could further help guiding the planning of the supramalleolar osteotomy according to the varus/valgus alignment of the patients.

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人体后足有限元模型及其在颚骨上截骨术中的应用

背景大多数踝关节骨关节炎病例都是创伤后引起的，患者年龄较轻，预期寿命较长。因此，保留关节的手术（如踝关节上截骨术）在年轻患者中很受欢迎，尤其是那些因对位畸形而患有非对称性关节炎的患者。然而，目前缺乏对踝关节术后应力评估的生物力学研究。我们旨在构建一个可验证的人体后足有限元模型，并探讨不同截骨参数对治疗曲踝关节炎的影响。将有限元计算结果与负重 CT（WBCT）数据进行比较，以验证模型。通过设置不同的模型参数，如截骨高度（L）和截骨牵引距离（h），比较了不同手术参数对踝关节表面接触应力的影响。该模型计算出的踝关节表面最大接触应力随曲张角的增大而增大。我们的研究中，手术参数与踝关节应力之间的关系有助于根据患者的内翻/外翻对位情况进一步指导踝上截骨术的规划。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Clinical Biomechanics 医学-工程：生物医学

CiteScore

3.30

自引率

5.60%

发文量

189

审稿时长

12.3 weeks

期刊介绍： Clinical Biomechanics is an international multidisciplinary journal of biomechanics with a focus on medical and clinical applications of new knowledge in the field. The science of biomechanics helps explain the causes of cell, tissue, organ and body system disorders, and supports clinicians in the diagnosis, prognosis and evaluation of treatment methods and technologies. Clinical Biomechanics aims to strengthen the links between laboratory and clinic by publishing cutting-edge biomechanics research which helps to explain the causes of injury and disease, and which provides evidence contributing to improved clinical management. A rigorous peer review system is employed and every attempt is made to process and publish top-quality papers promptly. Clinical Biomechanics explores all facets of body system, organ, tissue and cell biomechanics, with an emphasis on medical and clinical applications of the basic science aspects. The role of basic science is therefore recognized in a medical or clinical context. The readership of the journal closely reflects its multi-disciplinary contents, being a balance of scientists, engineers and clinicians. The contents are in the form of research papers, brief reports, review papers and correspondence, whilst special interest issues and supplements are published from time to time. Disciplines covered include biomechanics and mechanobiology at all scales, bioengineering and use of tissue engineering and biomaterials for clinical applications, biophysics, as well as biomechanical aspects of medical robotics, ergonomics, physical and occupational therapeutics and rehabilitation.