Alternate Bearing Surfaces in Hip Replacement Orhun K. Muratoglu and Steven M. Kurtz Cementless Femoral Stem Design Robert B. Bourne Cemented Stems Steven M. Dellose, Andrew H. Kim, and Raj K. Sinha Cemented Acetabular Components Hugh U. Cameron Biological Fixation in Hip Replacement Noreen J. Hickok, James J. Purtill, Michele Marcolongo, and Rocky S. Tuan Osteolysis in Total Hip Arthroplasty: Biological and Clinical Aspects Gun-Il Im, Rajiv K. Sethi, Harry E. Rubash, and Arun S. Shanbhag Revision Arthroplasty of the Acetabulum with Restoration of Bone Stock Allan E. Gross Revision of the Femoral Component Raj K. Sinha Surface Arthroplasty of the Hip Revisited: Current Indications and Surgical Technique Paul E. Beaulé and Harlan C. Amstutz Treatment of the Infected Total Hip Arthroplasty David J. Dunlop, Bassam A. Masri, Donald S. Garbuz, Nelson V. Greidanus, and Clive P. Duncan Hip Arthroscopy James T. Ninomiya Computer-Assisted Orthopaedic Surgery for the Hip Anthony M. DiGioia III, Frederic Picard, Branislav Jaramaz, James Moody, and Anton Plakseychuk A Five-Step Approach to Preoperative Planning in Total Hip Arthroplasty Rajit Saluja, Rohit R. Dhir, and William L. Bargar