Excellent Wear Performance
    Without the Risk of Oxidation

United E-XPETM enhanced wear resistance, oxidative stability and mechanical properties without the compromises of the 
re-melt polyethylene.

Enhanced Oxidative Stability
Antioxidant Vitamin E provides long-term oxidative protection by stabilizing
the free radicals.1 E-XPETM minimizes the potential of in vivo oxidation.
Even after accelerated aging, E-XPETM still retains oxidative stability.2,3

Superior Wear Resistance
Optimal radiation dosage improves the wear resistance of E-XPETM over HXLPE products. Comparing to HXLPE, E-XPETM liner and insert performed 75% and 60%
reduction respectively in gravimetric wear after accelerated aging

Preserved Mechanical Properties
E-XPETM retained the mechanical strength as high as UHMWPE and with even 20% more strength comparing to HXLPE.9


  1. Oral et al., The effect of alpha-tocopheral on the oxidation and free radical decay in irradiated UHMWPE. Biomaterials. 2006 ; 27(32): 5580–5587.
  2. Report number: UOC-RD-TR-15014
  3. Report number: UOC-RD-TR-15030
  4. Report number: UOC-RD-TR-15052
  5. Report number: UOC-RD-TR-10012
  6. Report number: UOC-RD-TR-16017
  7. Report number: UOC-RD-TR-10028
  8. Schaffner and Zurbrugg, The effect of accelerated aging mechanical properties and oxidation of UHMWPE liners gamma-sterilized in nitrogen.2000 46th Annual Meeting, Orthopaedic Research Society, Orlando, pp. 545-562.
  9. Report number: UOC-RD-TR-15015