A Prospective, Post-Market, Clinical Follow-up Study of the Incompass™ Total Ankle System

It is anticipated that a total of 200 subjects will be enrolled at up to ten sites over a three year enrollment period. The study has been designed to follow the surgeon's standard of care for subjects treated with a total ankle replacement including imaging (x-rays and or CT scans). The primary endpoint of this study is the 24-month total Ankle Osteoarthritis Scale (AOS) score improvement after index surgery (or Initial Assessment). Secondary endpoints include safety (adverse events, reoperation, and survivorship) as well as performance measures (radiographic assessments, PROMIS Global Health questionnaire, Foot and Ankle Ability Measure \[FAAM\] and Total Ankle Replacement \[TAR\] Satisfaction questionnaires).