title: Lateral unicompartmental knee replacement survivorship and clinical experience over 21 years.
abstract: We describe 88 knees (79 patients) with lateral unicompartmental osteoarthritis which had been treated by the St Georg Sled prosthesis. At a mean follow-up of nine years (2 to 21) 15 knees had revision surgery, nine for progression of arthritis, six for loosening, four for breakage of a component and four for more than one reason. Six patients complained of moderate or severe pain at the final follow-up. Only five knees were lost to follow-up in the 21-year period. We performed survivorship analysis on the group using revision for any cause as the endpoint. At ten years the cumulative survival rate was 83%, and at 15 years, when ten knees were still at risk, it was 74%. Based on our clinical results and survival rate the St Georg Sled may be considered to be a suitable unicompartmental replacement for isolated lateral compartment osteoarthritis.
authors.affiliation: Bristol Knee Group, Winford Unit, Avon Orthopaedic Centre, Southmead Hospital, Bristol, England, UK.
authors.forename: T
authors.initials: T
authors.lastname: Ashraf
authors.forename: J H
authors.initials: JH
authors.lastname: Newman
authors.forename: R L
authors.initials: RL
authors.lastname: Evans
authors.forename: C E
authors.initials: CE
authors.lastname: Ackroyd
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D015996:Survival Rate; D016896:Treatment Outcome