MEMPHIS, Tenn., Dec. 2, 2010 /PRNewswire/ -- A newly released patient registry reports that hip replacement implants made from ceramicized metal heads which articulate against polyethylene lined cups have been shown to have superior survivorship compared to implants made from any other material five years after surgery. OXINIUM™ Oxidized Zirconium and cross-linked polyethylene (XLPE), the materials in VERILAST Technology from Smith & Nephew (NYSE: SNN, LSE: SN) Orthopaedics Division, comprise the overwhelming majority of ceramicized metal hip implants in the global orthopaedic market. VERILAST Technology is used in both hip and knee replacement implants.
The Australian Orthopaedic Association's National Joint Replacement Registry Annual Report tracks virtually all joint replacements implanted in that country, and in the 2010 edition, the group reports on more than 150,000 hip replacements implanted between 1999 and 2009.
The data shows that implants using ceramicized metal technology, such as OXINIUM Oxidized Zirconium, in combination with polyethylene, remained successful in 97.9%(1) of patients five years after surgery. Implants with bearings made from other materials had to be revised (surgically corrected or replaced) over the same period at higher rates. The survivorship rate for ceramicized metal bearings improved to 98.5-percent in the larger component sizes, and the performance gap between ceramicized metal bearings and other bearing materials widened, as well.
"OXINIUM material in combination with cross-linked polyethylene is unique among hip replacement technologies," says Joseph M. DeVivo, president of Smith & Nephew Orthopaedics. "We're thrilled by these results—we've worked hard to introduce technologies that improve the wear performance of implants, and this report confirms our decades of research and innovation. Active patients demand implants that can keep pace with their lifestyle, and we have the patent