Randomised clinical trial assessing migration of uncemented primary total hip replacement stems, with and without autologous impaction bone grafting.

Purpose: Uncemented stems in primary total hip replacement (THR) are concerning in the elderly due to ectatic femoral canals and cortical thinning resulting in higher incidence of fracture and subsidence in this population. To obviate this concern, the authors developed a technique using autologous impaction bone grafting to achieve a better fitting femoral stem. The aim of this randomised clinical trial was to assess the efficacy of the technique.

Prospective randomised clinical trial assessing subsidence and rotation, using radiostereometric analysis, of two modular cementless femoral stems (Global K2 and Apex).

Aims: To accurately assess subsidence, rotation and clinical scores in two cementless femoral stems.

Methods: 260 patients received either K2 or Apex femoral stems and were studied over 2y, with RSA and clinical scores.

Results: Mean Oxford Hip score for both stems was excellent (45.