Iodinated methacrylate copolymers as X-ray opaque denture base acrylics

Objectives: The purpose of this study was to evaluate novel iodinated methacrylate copolymers as X-ray opaque denture base resins. Methods: The synthesis of specific monomers and suspension copolymerization with methyl methacrylate to produce copolymer beads. The resulting beads were professed in an identical manner to standard PMMA to produce test-pieces for mechanical testing. Results: Samples prepared from beads containing 25 wt% of the iodinated copolymer exhibited an X-ray opacity equivalent to that exhibited by a similar thickness of aluminium. Furthermore, the appearance and mechanical properties were comparable to standard PMMA, while thermal stability proved superior. Conclusion: These novel iodinated methacrylate monomers show promise not only as polymerizable additives to methyl methacrylate to produce an X-ray opaque denture base but also as thermally stable copolymerizable additives to other applications where X-ray opacity would be advantageous. (C) 1997 Elsevier Science Ltd. All rights reserved.