Wear-Reduction Technology in Total Knee Arthroplasty

Due to the increasing burden of revision in total knee arthroplasty (TKA), sustainable improvements in implant longevity may require the continued development of advanced bearing materials. The LEGIONTM Primary Knee System featuring VERILASTTM technology is the first device to combine an OXINIUMTM Oxidized Zirconium femoral component with a highly crosslinked ultra-high molecular weight polyethylene (UHMWPE) tibial insert to form an advanced TKA bearing. Following the review of published volumetric wear rates, this bearing coupling was found to provide the lowest observed wear of any contemporary TKA device, potentially supporting the equivalent of 30 years of normal use in vivo. This evidence supports the assertion that both tibial and femoral bearing surfaces can significantly affect TKA wear. Moreover, the use of VERILASTTM technology may reduce long-term revision risk and support device longevity in younger, more active patients.