Di-cumyl peroxide cross-linked UHMWPE/vitamin-E blend for total joint arthroplasty implants.

Autor: Muratoglu OK; Harris Orthopaedics Laboratory, Massachusetts General Hospital, Boston, Massachusetts, USA.; Department of Orthopaedic Surgery, Harvard Medical School, Boston, Massachusetts, USA., Asik MD; Harris Orthopaedics Laboratory, Massachusetts General Hospital, Boston, Massachusetts, USA.; Department of Orthopaedic Surgery, Harvard Medical School, Boston, Massachusetts, USA., Nepple CM; Harris Orthopaedics Laboratory, Massachusetts General Hospital, Boston, Massachusetts, USA., Wannomae KK; Harris Orthopaedics Laboratory, Massachusetts General Hospital, Boston, Massachusetts, USA., Micheli BR; Harris Orthopaedics Laboratory, Massachusetts General Hospital, Boston, Massachusetts, USA., Connolly RL; Harris Orthopaedics Laboratory, Massachusetts General Hospital, Boston, Massachusetts, USA., Oral E; Harris Orthopaedics Laboratory, Massachusetts General Hospital, Boston, Massachusetts, USA.; Department of Orthopaedic Surgery, Harvard Medical School, Boston, Massachusetts, USA.
Jazyk: angličtina
Zdroj: Journal of orthopaedic research : official publication of the Orthopaedic Research Society [J Orthop Res] 2024 Feb; Vol. 42 (2), pp. 306-316. Date of Electronic Publication: 2023 Aug 25.
DOI: 10.1002/jor.25679
Abstrakt: Majority of ultrahigh molecular weight polyethylene (UHMWPE) medical devices used in total joint arthroplasty are cross-linked using gamma radiation to improve wear resistance. Alternative methods of cross-linking are urgently needed to replace gamma radiation due to rapid decline in its supply. Peroxide cross-linking is a candidate method with widespread industrial applications. Oxidative stability and biocompatibility, which are critical requirements for medical device applications, can be achieved using vitamin-E as an additive and by removing peroxide by-products through high-temperature melting, respectively. We investigated compression molded UHMWPE/vitamin-E/di-cumyl peroxide blends followed by high-temperature melting in inert gas as a material candidate for tibial knee inserts. Wear resistance increased and mechanical properties remained largely unchanged. Oxidation induction time was higher than most of the other clinically available formulations. The material passed the local-end point biocompatibility tests per ISO 10993. Compounds found in exhaustive extraction were of no concern with margin-of-safety values well above the accepted level, indicating a desirable toxicological risk profile. Statement of Clinical Significance: Peroxide cross-linked, vitamin-E stabilized, and high-temperature melted UHMWPE has recently been cleared for clinical use in tibial knee inserts. With all the salient characteristics needed in a material that can provide superior long-term performance in total joint patients, peroxide cross-linking can replace the gamma radiation cross-linking of UHMWPE.
(© 2023 Orthopaedic Research Society.)
Databáze: MEDLINE
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