ASR-XL Metal-on-Metal 522 Post-Market Surveillance Study

Inclusion Criteria

• •1. Able to (or capable of) provide written, voluntary consent to participate in the clinical investigation,
• •2. Is willing and able to return for all protocol defined clinic visits,
• •3. Subject has (or had, if previously revised) a combination of the following implants in the study hip:
• •1. ASR-XL cup or ASR 300 cup
• •2. XL femoral head
• •3. ASR-XL tapered sleeve adapter
• •4. One of the following stems
• •i. S-ROM ii. Corail iii. Tri-Lock iv. AML v. Summit vi. Prodigy vii. C-Stem AMT
• •4. Subject has high quality films available for review that were taken within 12 months of primary surgery of the following views:
• •1. Standing AP-Pelvis
• •2. Standing AP-Proximal Femur (if this view is not available but the AP-Pelvis shows the entire implant and greater trochanter, that is also acceptable)
• •3. Lauenstien Lateral Proximal Femur (Lateral-femur).