We present the results of short- to medium-term follow-up of 10 patients following ulna head replacement. The mean age of patients was 63.2 years (range 48–81 years), with the mean duration of follow-up being 48 months (12–88 months). The indications for the procedure were primary osteoarthritis (n=3), post-traumatic osteoarthritis (n=4), failed Darrach's procedure (n=2) and rheumatoid arthritis (n=1). Two patients required revision (20%), one for gross aseptic loosening of the stem and another for an initially oversized head. At final follow-up, the satisfactory rate was 90%. The mean VAS score was 2.4 (range 0–8). The average DASH score was 37 (range 0–72.5). Our study suggests that ulna head replacement can give satisfactory forearm function; however, concerns exist regarding bone resorption and tapering around the prosthesis, which may affect the long-term performance of the prosthesis.IV.