1. Comparison of Whole-Blood Metal Ion Levels in Four Types of Metal-on-Metal Large-Diameter Femoral Head Total Hip Arthroplasty: The Potential Influence of the Adapter Sleeve by Martin Lavigne, Etienne L. Belzile, Alain Roy, François Morin, Traian Amzica, and Pascal-André Vendittoli J Bone Joint Surg Am Volume 93(Supplement 2):128-136 May 4, 2011 ©2011 by The Journal of Bone and Joint Surgery, Inc.

2. Photographs of the different large-diameter-head total hip arthroplasty implants used in this study: the Biomet Magnum (top right), the DePuy ASR (bottom right), and the Zimmer Durom (bottom left). Martin Lavigne et al. J Bone Joint Surg Am 2011;93:128-136 ©2011 by The Journal of Bone and Joint Surgery, Inc.

3. Box plot chart showing cobalt ion levels stratified by manufacturers and follow-up periods. Martin Lavigne et al. J Bone Joint Surg Am 2011;93:128-136 ©2011 by The Journal of Bone and Joint Surgery, Inc.

4. Box plot chart showing titanium ion levels stratified by manufacturers and follow-up periods. Martin Lavigne et al. J Bone Joint Surg Am 2011;93:128-136 ©2011 by The Journal of Bone and Joint Surgery, Inc.

5. Anteroposterior radiographs and 1.5 Tesla T2-weighted stir axial magnetic resonance image showing signs of a reaction to metal debris in a patient who presented with pain after undergoing a Zimmer large-diameter-head total hip arthroplasty. Martin Lavigne et al. J Bone Joint Surg Am 2011;93:128-136 ©2011 by The Journal of Bone and Joint Surgery, Inc.

6. Martin Lavigne et al. J Bone Joint Surg Am 2011;93:128-136 ©2011 by The Journal of Bone and Joint Surgery, Inc.

7. Martin Lavigne et al. J Bone Joint Surg Am 2011;93:128-136 ©2011 by The Journal of Bone and Joint Surgery, Inc.