Fig. 5From: Unexpected early loosening of rectangular straight femoral Zweymüller stems with an alumina-reduced surface after total hip arthroplasty—a prospective, double-blind, randomized controlled trialKaplan–Meier survival estimates for the implanted stems up to 55 months after primary THA. Two standard (STD) stems failed at a mean of 29 months and 11 (41%) of the 27 implanted new technology (NT) stems had failed within 50 monthsBack to article page