Medial Unicompartmental Arthroplasty of the Knee

Jason M. Jennings, MD, DPT; Lindsay T. Kleeman-Forsthuber, MD; Michael P. Bolognesi, MD


J Am Acad Orthop Surg. 2019;27(5):166-176. 

In This Article

Cost-effectiveness of Unicompartmental Knee Arthroplasty

Ghomrawi et al[5] performed a Markov decision analysis using the Swedish registry and found lower life-time costs and higher lifetime quality-adjusted life years for UKA compared with those for TKA in all age groups older than 65 year (lifetime costs ranging from $35,000 to $46,600 for UKA and from $42,000 to $47,600 for TKA). UKA was no longer cost-effective when rehabilitation costs for TKA decreased by two thirds or when 45% of UKA patients required rehabilitation admission.[5] A recent meta-analysis found similar results with patients over 75 years old consistently reaching the cost-effective threshold for performing a UKA instead of TKA, but patients younger than 65 years not being economically favorable candidates for UKA.[43] The major limiting factor in younger patients was implant survivorship, suggesting that improvements in UKA survival would make younger patients better financial candidates for UKA.[43]