INFINITY™Total Ankle Replacement Follow-up

Inclusion Criteria: * Be 21 years of age or older at the time of surgery; * Diagnosed with unilateral and/or bilateral ankle joint disease; * Diagnosed with ankle joint damage from rheumatoid arthritis, post-traumatic, or degenerative arthritis; * Willing and able to consent to participate (written, informed consent; * Willing and able to attend the requested follow-up visits; * A clinical decision has been made to use INFINITY™ Total Ankle System replacement prior to enrollment in the research. Exclusion Criteria: * Subjects with an ankle condition, as determined by the investigator, to be an inappropriate candidate for a total ankle replacement; * Subjects requiring revision total ankle replacement of the ankle being considered for study.