Observational Study of Total Ankle Arthroplasty and Tibiotalar Arthrodesis

Inclusion Criteria: * Patient with isolated symptomatic end-stage ankle arthritis who needs a tibiotalar arthrodesis or a mobile-bearing total ankle arthroplasty * Patient receiving CE marked medical devices and planned to be operated in compliance with their respective Instructions for Use * Patient aged between 40 and 75 years old Exclusion Criteria: * Patient who already had before his inclusion in this study a tibiotalar arthrodesis or a total ankle arthroplasty in the same ankle * Patient with planned or existing arthrodesis of adjacent joints (subtalar, talonavicular and calcaneaocuboid joint) * Patient with ankle deformity \> 20° (weight bearing X-rays) * Patient with history of infection of the ankle joint (positive culture) or current infection of the ankle joint (positive culture) * Patient with neuropathy or with a history of diabetes mellitus for more than 15 years * Patient with avascular necrosis of the talus \>25% * Patient already included in the study for the other ankle