title: Short- to mid-term results of ulna head replacement as both a primary and revision implant.
abstract: 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.
  
  
  METHODS
  IV.
authors.affiliation: Homerton Hospital, Homerton Row, London E9 6SR, United Kingdom.
authors.forename: Tobias K A
authors.initials: TK
authors.lastname: Baring
authors.affiliation: Frimley Health NHS Foundation Trust, Wexham Park Hospital, Berkshire SL2 4HL, United Kingdom.
authors.forename: Ravi
authors.initials: R
authors.lastname: Popat
authors.affiliation: Homerton Hospital, Homerton Row, London E9 6SR, United Kingdom.
authors.forename: Ali
authors.initials: A
authors.lastname: Abdelwahab
authors.affiliation: Barnet Hospital, Well House Lane, Barnet, Hertfordshire EN5 3DJ, United Kingdom.
authors.forename: Barry
authors.initials: B
authors.lastname: Ferris
keywords: Arthritis; Distal radio-ulna joint; Distal ulna replacement; Wrist arthroplasty