Total ankle replacement has become an increasingly recommended treatment option for endstage ankle osteoarthritis over the last decades. As a result of this progress, a large variety of implant systems exist.

The Hintermann Series H3 Total Ankle Replacement System (H3) is a three-piece, mobile-bearing implant. The H3 is indicated for use as a non-cemented implant to replace a painful arthritic ankle joint due to primary osteoarthritis, post-traumatic osteoarthritis, or arthritis secondary to inflammatory disease.

The purpose of this study is to investigate long-term (up to 5 years) how the H3 implant is performing, collect information about the device through x-rays of the joint, document any complications from the device implant, see how the device affects patient quality of life.

This implant has already been tested and been approved by the FDA and is already in use routinely in total ankle replacements within the United States. We are conducting this study to gain further knowledge about the implant. In order to do this, x-rays which have been taken as part of your routine care will be reviewed. Any additional x-rays conducted during the period of the research will also be reviewed. We are also interested in measuring improvements in patient-reported information related to quality of life and pain following implantation over a 10-year period.