Maine Orthopaedic Review Monthly Challenge

Test Your Knowledge of Total Knee Arthroplasty

Bruce F. Gomberg, MD; Ira Kirschenbaum, MD

Disclosures

February 08, 2017

The most common mode of failure in UKA is aseptic loosening, which is believed to be due to excessive stress on the supporting cancellous bone. Migration and subsequent aseptic loosening of the tibial component in UKA is thought to be due to fatigue failure of the supporting cancellous bone. This fatigue failure is a result of excessive compressive stresses occurring at the bone-implant interface. The most suitable inclination for a UKA tibial component was in slightly valgus inclination (2º and 4º valgus inclination).[11,12,13]

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