EFFECT OF AGEING ON MONOMER ELUTION FROM POLY (METHYL METHACRYLATE) RESIN UNDER SIMULATED INTRA-ORAL CONDITIONS

摘要

A simple HPLC-UV method was used for monitoring the elution profile of methyl methacrylate and methacrylic acid monomers from poly (methyl methacrylate) resin. The study was conducted on two cold-curing and two heat-curing discs in both distilled water and artificial saliva. The results showed that the leached amounts from cold-curing resin in both media were higher than that from heat-curing resin. The leached amount into the artificial saliva from both resins was much higher, compared to that into water. The present results indicated that the risk of possible trauma to oral soft tissues could be minimized by immersing the oral appliances in water for one week before insertion.