Allergy to a common component of resin-bonding systems: a case report.

Allergies to materials routinely used in dentistry are becoming more prevalent. The hydrophilic resin 2-hydroxyethyl methacrylate is a common constituent of systems designed to bond resin-based restorative materials to dentine. It has been considered to have a high sensitizing potential, although dental patient-related allergies to the resin appear to be rare. This report presents details of a patient who has such an allergy, which, it is suspected, manifested as an intra-oral lichenoid reaction to the closely approximating anterior restorations.