Bulk-Fill Restorative Materials in Primary Tooth: An Intrapulpal Temperature Changes Study

Objectives: It was aimed to investigate the temperature changes in primary teeth pulp chamber during the curing/setting of bulk-fill restorative materials with different nanoparticle contents. Methods: Twenty-five extracted, primary mandibular second molars were prepared as a Class II cavity. Five bulk-fill restorative materials consisting of Equia Fil (HVGIC), glass carbomer (GC) cement, Sonic Fill (SF), X-tra Fil (XF), and Quix Fil (QF) were tested. The measurement of the pulp chamber temperature changes (starting temperature 37 degrees C) during setting/curing was performed with a J type thermocouple. The data, differences between highest and initial temperature values, were recorded and analyzed by one-way ANOVA. Results: The temperature changes in the pulp chamber were in EF (2.81 degrees C), GC (7.92 degrees C), SF (3.33 degrees C), XF (3.43 degrees C), and QF (3.02 degrees C). There were statistically significant differences between temperature changes in groups (P < 0.05). Conclusion: The tested bulk-fill resin composites and high-viscosity glass ionomer cement do not increase the intrapulpal temperature in primary teeth during the curing/setting.