Articular geometry can affect joint kinematics, contact mechanics, and implant-bone micromotion in total ankle arthroplasty

Zhang, Yanwei; Chen, Zhenxian; Zhao, Dahang; Yu, Jian; Ma, Xin; Jin, Zhongmin

Affiliations

¹State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, China

²Key Laboratory of Road Construction Technology and Equipment (Ministry of Education), School of Mechanical Engineering, Chang'an University, Xi'an, China

³Department of Orthopaedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China

⁴Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China

⁵Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, China

⁶Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, UK

Abstract and keywords

Implant loosening and bearing surface wear remain the most common failure problems of total ankle arthroplasty (TAA). One of the main factors leading to these problems is the nonphysiologic design of articular surfaces. The goals of this study were to reveal the effects of the anatomical medial-lateral borders height differences, coronal and sagittal radii on the joint kinematics, contact mechanics, and implant-bone micromotion in TAA. A previously developed and validated musculoskeletal (MSK) multibody dynamics (MBD) modeling method of TAA based on AnyBody generic MSK MBD model (five simulations for each implant) was used by combining with a finite element analysis. Five ankle implant models with different articular surface morphologies were created according to the anatomic characteristics of Chinese measurement data, marked as Implant A to E. The total ankle forces and motions during walking simulation were predicted by MSK MBD models and the contact mechanics of the bearing surface and the micromotion of the implant-bone interface of TAA were predicted by FE models. Compared with Implant A, the internal-external rotation in Implant E increased by 12.14%, the maximum of anterior-posterior translation in Implant E increased by 5.62%, the maximum reduction of tibial micromotion in Implant E was 59.98%, and for talar, micromotion was 15.36%. The ankle implant with similar anatomic articular surface has the potential to allow patients to recover better motions and reduce the risk of early loosening. This study would provide design guidance for the development of new ankle implants and further advance the development of TAA. Clinical Significance: This study promoted the improvement of ankle implant design and made contributions to improve the service life of ankle implant and patient satisfaction.

Keywords: contact mechanics; implant design; kinematics; micromotion of implant-bone; total ankle arthroplasty

Links

DOI: 10.1002/jor.25381

PubMed: 35579007

WoS: 000800220100001

History

Received: 202110-27

Revised: 2022-04-20

Accepted: 2022-05-14

Cited Works (1)

Year	Entry
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