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ECiMa

Trinity shell with ECiMa liner

ECiMa2

ECiMa elevated posterior wall liner

ECiMa3

ECiMa neutral liner

ECiMa

Trinity cluster shell with Trinity Dual Mobility (ECiMa insert)

ECiMa™


Vitamin-E enriched advanced polyethylene

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About


Corin’s most advanced polyethylene enriched with antioxidant vitamin E, designed to provide an alternative to hard bearings.

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Video


Ultra-low wear

Ultra-low wear


In mobile joint replacement, minimising wear is critical to longevity.

ECiMa has excellent wear properties thanks to extensive cross-links created during an optimised, cold gamma irradiation process1. When compared to UHMWPE and HXLPE, a 95% and 83% reduction in wear rate was recorded2.

Mechanical performance

Mechanical performance


After cross-linking, some free radicals may remain. Removing these reactive free radicals is critical. 

Corin use a proprietary mechanical annealing process to reduce free radicals created during the irradiation process without re-melting. This means crystallinity is largely unaffected and ECiMa retains the proven mechanical strength and performance of UHMWPE3.

Oxidative stability

Oxidative stability


An optimised dosage4 of vitamin-E is blended with UHMWPE before consolidation to provide uniform, long term resistance to oxidation2,5,6,7.

This vitamin-E reduces oxidation initially by neutralising reactive free radicals created during irradiation, and a remaining antioxidant reservoir provides active stabilisation to minimise in vivo oxidation.

References

References


  1. Oral E, Godleski Beckos C, Malhi AS, Muratoglu OK. The effects of high dose irradiation on the crosslinking of vitamin E-blended ultra-high molecular weight polyethylene. Biomaterials, 2008:29;3557- 60.
  2. Traynor A, Simpson D, Collins S. ECiMa™ for low wear, optimal mechanical properties and oxidation resistance of hip bearings. Total Hip Arthroplasty – Wear Behaviour of Different Articulations, EFORT Reference in Orthopaedics and Traumatology, Springer: ISBN 978-3-642-27360-5, 2012.
  3. Data on file, Corin Group ltd.
  4. Data on file, Corin Group ltd.
  5. Competitor literature review.
  6. Oral E, Wannomae KK, Hawkins NE, Harris WH, Muratoglu OK. a-Tocopherol doped irradiated UHMWPE for high fatigue resistance and low wear. Biomaterials, 2004;25(24):5515–22.
  7. Oral E, Christensen S, Malhi A, Wannomae K, Muratoglu O. Wear resistance and mechanical properties of highly crosslinked UHMWPE doped with vitamin E. Journal of Arthroplasty, 2006;21(4):580–91. 5 Oral E, Godleski Beckos C, Malhi AS, Muratoglu OK. The effects of high dose irradiation on the crosslinking of vitamin E-blended ultra-high molecular weight polyethylene. Biomaterials, 2008:29;3557- 60.
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