10-year minimum follow-up period.
Cartier P, Sanouiller JL, Grelsamer RP, Clinique des Lilas, Paris, France

Abstract — Sixty knees in 54 patients were followed a minimum of 10 years after unicompartmental knee arthroplasty [partial knee resurfacing] surgery. Follow-up periods ranged from 10 to 18 years (average, 12 years). Two patients required arthroplasty surgery after the 10-year mark. Seven knees required revision prior to 10 years, and the 10- to 12-year survivorship for the entire cohort was 93%. Slight undercorrection of varus alignment and adequate polyethylene thickness of the tibial component appear to be important contributors to a successful outcome.
 
J Arthroplasty, 11(7):782-8, October 1996