Clinical Review of the Zweymuller Femoral Stem

Abstract

This review summarizes published literature from a range of reputable sources regarding hip prostheses (stems) utilized currently in cementless Total Hip Arthroplasty. The critical review of published clinical studies shows Zweymuller style (Alloclassic and SL-Plus) stems in all critical characteristics. Since the introduction of cementless total hip arthroplasty in the 1970s, a range of design philosophies for femoral and acetabular components have demonstrated variable clinical success1,3. Recently cementless components have been yielding clinical results on par and in some cases even surpassing their cemented predecessors2,4,6. As a result, cementless THA is gaining in popularity1,7. The short-term results of four of the best cementless femoral components recorded in the Norwegian Arthroplasty Register as described by Havelin et al, included the Corail, lMT, Profile and Zweymuller stems with revision for loosening <1% at 4.5 years which was comparable to cemented counterparts.