Outcomes following cyst curettage and bone grafting for the management of periprosthetic cystic evolution after AES total ankle replacement.

We present a prospective series of 50 AES total ankle replacements performed between 2003 and 2006. The present report concerns medium-term results of cyst curettage-grafting. Twenty total ankle replacements underwent revision: 6 by tibiotalocalcaneal arthrodesis and 14 by cyst curettage-grafting. With 79% and 92% rates of unimproved or worsened functional and radiological status respectively, our results in cyst grafting are poor. No previous series of curettage-graft in evolutive periprosthetic total ankle replacement cyst have been reported. In periprosthetic cyst, we recommend annual radiological surveillance, with CT in case of cyst enlargement and/or increased pain, to allow implant removal and reconstruction-arthrodesis before collapse.