全踝置换术后不同宽度两组件式假体胫骨组件对踝关节的生物力学影响

doi:10.3969/j.issn.0258-8021.2026.01.007

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Abstract The two-component total ankle prosthesis has shown favorable short-term clinical outcomes in treating patients with end-stage ankle osteoarthritis; however, its compatibility with the tibial anatomy remains a critical determinant of clinical performance. This study aimed to investigate the biomechanical effects of different tibial component widths in the two-component total ankle prosthesis on ankle joint mechanics. Based on weight-bearing foot and ankle CT imaging data, five three-dimensional (3D) finite element models of ankle joint replacement were constructed, with tibial component widths of 20, 22, 24, 26, 28 mm. Finite element analyses were conducted under various loading conditions representative of those experienced during the gait cycle. The validity of the ankle joint model was confirmed through mesh convergence analysis and by comparing stress distributions in the tibia, fibula, and talus with values reported in the literature. Results showed that increasing the tibial component width from 20 mm to 26 mm progressively reduced the peak tibial stress under gait loading, with a maximum decrease of 32.94%, thereby promoting a more uniform stress distribution. At this width, prosthesis micromotion was consistently below 50 μm, indicating optimal initial stability of the model. Increasing the tibial component width to 28 mm led to a peak stress rise of up to 36.3%, accompanied by a reduction in prosthesis stability. At a tibial component width of 26 mm, the cross-sectional area ratio at the top tangent plane of the distal tibial articular surface was 71.91%. Therefore, when selecting the width of a two-component total ankle prosthesis, it is advisable to approximate this ratio and match the corresponding prosthesis model to enhance stability and ensure favorable clinical outcomes.

Key words： the two-component total ankle prosthesis tibial component width biomechanics the gait cycle finite element analysis

Received: 15 December 2024

PACS:

R318

Corresponding Authors: ^*E-mail: pbq@buaa.edu.cn

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	Articles by authors
	Liu Jing
	Xu Yangyang
	Lu Da
	Wu Yong
	Pei Baoqing

Cite this article:

Liu Jing,Xu Yangyang,Lu Da, et al. Biomechanical Effect of Different Widths of Tibial Component on Two-Component Total AnkleProstheses Post Total Ankle Arthroplasty[J]. Chinese Journal of Biomedical Engineering, 2026, 45(1): 70-78.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2026.01.007 OR http://cjbme.csbme.org/EN/Y2026/V45/I1/70

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