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Updated: Jun 12, 2025
Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
Published on: January 24, 2018
A comparative study of INBONE II, INFINITY, and an anatomical-design prosthesis by a patient-specific wear prediction
Yanwei Zhang1, Jing Zhang2, Zhenxian Chen2
1Department of Orthopedics, Qilu Hospital, Shandong University, Jinan 250000, Shandong, China.
Background And Objectives:
Notably, aseptic loosening in total ankle replacements limits their longevity. Ankle prostheses wear is closely linked to articular surface geometry, necessitating quantitative evaluation to understand wear failure and improve design. The objective of this study is to develop a patient-specific wear model based on in vivo biomechanical environment of the ankle joint. Utilizing this model, we aim to explore and evaluate the differences in wear performance among three prostheses with distinct articular surface designs, namely the INBONE II, INFINITY, and an anatomical-design prosthesis.
Methods:
A novel wear prediction framework was developed by coupling a patient-specific lower extremity musculoskeletal multibody dynamics model with a finite element contact mechanics and wear model for total ankle replacement. The interaction between articular surface wear and ankle motions was considered. The wear performance of two commercial implants, INBONE II and INFINITY, and an anatomical-design prosthesis was evaluated.
Results:
Under ankle biomechanical conditions, as wear increased, there was a slight increase in the internal/external rotation and anterior/posterior translation motions of the ankle joint. This change also resulted in a variation in the contact stress distribution on the insert's bearing surface. The wear rate of the anatomical-design prosthesis was 7.5 % lower than that of INBONE II and 49.5 % lower than that of INFINITY. Therefore, the articular surface design of the anatomical-design ankle prosthesis contributes to reducing wear rate.
Conclusion:
This study provides a platform for investigating the wear characteristics of ankle implants with different articular surfaces and offers a theoretical basis for prosthesis selection.
