Standard Practice for Accelerated Aging of Ultra-High Molecular Weight Polyethylene After Gamma Irradiation in Air

Importancia y uso:

4.1 This practice summarizes a method that may be used to accelerate the oxidation of UHMWPE components using elevated temperature and elevated oxygen pressure. Under real-time conditions, such as shelf aging and implantation, oxidative changes to UHMWPE after sterilization using high-energy radiation may take months or years to produce changes that may result in deleterious mechanical performance. The method outlined in this practice permits the evaluation of oxidative stability in a relatively short period of time (for example, weeks).

4.2 This practice may also be used to oxidize UHMWPE test specimens and joint replacement components prior to characterization of their physical, chemical, and mechanical properties. In particular, this practice may be used for accelerated aging of UHMWPE components prior to evaluation in a hip or knee joint wear simulator as outlined in Guide F1714 (hip wear), Guide F1715 (knee wear), ISO 14242 (hip wear), or ISO 14243 (knee wear), or combination thereof.

Subcomité:

F04.15

Referida por:

F2777-23, F2665-21, F1357-23, F2565-21, F2977-20, F2722-21, F2624-12R20, F3336-22, F2582-20, F2759-19

Volúmen:

13.01

Número ICS:

83.080.01 (Plastics in general)

Palabras clave:

aging; oxidation; preconditioning; stability; UHMWPE; ultra-high molecular weight polyethylene;