[The influence of different surface treatments on the primary stability of cementless acetabular cups: an in vitro study].

Introduction: Long-term stability of cementless acetabular cups depends on osseointegration, which requires primary stability of the implant. The aim of this study was to determine the influence of different surface treatments on the primary stability of press-fit acetabular cups. Mechanical lever-out tests were performed to quantify the stability in vitro.