In a 2011 report by JM Smolders et al. published in Acta Orthopaedica titled “Metal ion levels and functional results after either resurfacing hip arthroplasty or conventional metal-on-metal hip arthroplasty.”, a team of medical researchers aimed to determine whether larger cup sizes in metal-on-metal hip replacements led to higher levels of metal ions in the blood after continued use.
As such, the team wrote “Modern metal-on-metal hip resurfacing was introduced as a bone-preserving method of joint reconstruction for young and active patients; however, the large diameter of the bearing surfaces is of concern for potentially increased metal ion release.”
To carry out this study, Smolders et al. (2011) followed 71 patients who received either a resurfacing hip arthroplasty or “conventional metal-on-metal hip replacement”. “Functional outcomes were assessed preoperatively and at 6, 12, and 24 months. Cobalt and chromium blood levels were analyzed preoperatively and at 3, 6, 12, and 24 months.”
While functional outcomes were improved in both groups, “Cobalt concentrations were statistically significantly higher for [resurfacing] patients … at 3 and 6 months. Chromium levels remained significantly higher for [resurfacing] patients until 24 months.”
Due to the fact that DePuy Orthopaedics, Inc., the manufacturer of many popular metal-on-metal hip replacement systems (such as the recently-recalled ASR and ASR XL) failed to notify consumers of the risk for elevated metal ion levels, a number of DePuy ASR hip replacement lawsuits are currently being filed.
If you or a loved one used a DePuy hip replacement and suffered early failure of the device, you may be entitled to significant financial compensation for your injuries. For a free, no-obligation case consultation, contact our team of DePuy ASR lawyers at the information provided below. We have the compassion, resources, and skills required to win the justice you deserve.
(855) 452 – 5529
Our DePuy ASR™ / ASR™ XL Hip Replacement Lawsuit Information page is a great place to start if you have any questions about DePuy ASR metal-on-metal hip replacements.