Oxidation and Damage Mechanisms of 2nd Generation Highly Cross-Linked Polyethylene Tibial Inserts

After clinical introduction in 2005, sequentially annealed, highly crosslinked polyethylene (SA HXLPE) was studied for retrievals with short implantation times; however, long-term follow-ups are lacking. The objective of this study was to examine and compare the revision reasons, damage mechanisms, and oxidation indices (OI) of SA HXLPE and conventional gamma-inert sterilized (Gamma Inert) ultra-high molecular weight polyethylene tibial inserts implanted for > 5 years.