Abstract

A review of 50 cases of a proximally modular noncemented stem has been carried out. The primary method of fixation was a proximal threaded sleeve which was screwed into bone. Mean follow-up was 5.2 years. Six cases were revised, two for stem loosening. The remaining cases rate 69% excellent, 14.3% good, 11.9% fair and 4.8% poor. Two cases showed distal lucency due to polyethylene debris which leaked through the taper lock because of two vertical grooves. The results were felt to be adequate, but the threaded sleeve is too difficult to insert which lead to an alternative method of sleeve fixation. The longitudinal grooves, which were obviously a fault in design, have been removed.