Urethane methacrylates were described in the literature in the 1960s(1) and various uses suggested, for example, adhesives(2) and dental restoratives(3). Recently resins of this type have been introduced for use in filled and fibre-reinforced composites(4,5,6). The way in which these resins complement and extend the performance range offered by traditional polyurethanes is reviwed in this paper.
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