Temperature Changes in Composite Materials during Photopolymerization

During polymerization, composite materials cause a temperature rise which may lead to irreversible changes in the dental pulp. The mechanical properties of depend on number factors, such as composition material, type polymerization unit, mode, and duration polymerization. objective this study was assess values flexural strength materials, obtained using different modes times A total six were used study. Samples each cured seven protocols. CMP-401 digital meter (Sonel, Świdnica, Poland), complete with K thermocouple (NiCr-Ni), record increases during light curing resin composites. Temperature rises recorded beneath disc an acrylic matrix. specimens tested for Cometech QC-508M2 testing machine. lowest results increased mean Fast-Cure 3 s (39.0 °C), while highest 20 (45.8 °C). average all protocols Z550 Filtek material. Mean strengths measured test group higher than minimum value per ISO:4049 standard. In case deep caries thin layer dentin separating filling from pulp, base or short mode is recommended protect pulp thermal injury.