Muscle Strength and Trendelenburg Sign after Total Hip Arthroplasty

Abstract

Despite the rehabilitative emphasis on hip abductor strength following total hip arthroplasty, it is unclear how muscular strength is related to Trendelenburg sign. Twenty-four patients (mean age 59 years) completed hip abductor and adductor strength assessments at 8 weeks after surgery. Isokinetic force-velocity curve indicated the significantly increased maximum torque for adductor in case of Trendelenburg positive patients. These data shows that hip abductor should play the most important role in Trendelenburg sign, besides it suggests that this sign should have something to do with its balance with hip adductor and force acting on the femoral head.