Ankle arthroplasty in patients younger and older than 50 years: A prospective series with long-term follow-up

One hundred consecutive cases treated with ankle arthroplasty for osteoarth ritis (OA) or rheumatoid arthritis were followed prospectively and annually for up to 15 years. Survivorship analysis was performed, with the endpoint being prosthesis revision or change to arthrodesis, Patients who were youn ger than 50 years at the first implantation constituted one group (group A, 30 ankles). The other group (group B, 70 ankles) consisted of patients age d 50 years or older at the first implantation. All patients were assessed c linically according to the Kofoed Ankle Score. The distribution of OA/rheumatoid arthritis in group A was 18/12, and in gr oup B it was 43/27 (not significant), The median age in group A was 46 year s (range, 22-49 years), and in group B it was 63 years (range, 51-83 years) , In group A, one case was revised, and three cases were converted to arthr odesis after a median of 5 years (range, 5-9 years), In group B, four cases were revised, and four cases were converted to arthrodesis after a median of 5.5 years (range, 2-8 years). The results of cases with traumatic OA did not differ between groups A and B, It was concluded that the results of an kle arthroplasty were of equal quality in patients younger than 50 years an d those who were older.