Influence of Bulk-fill, Flowable, and Dual-cure Resin Restorative Materials on Intrapulpal Thermal Changes during Polymerization with Light-curing Units at Curing Tip Distance
Year: 2020
Type: article
Abstract: Aim and objective:The purpose of the study was to evaluate the temperature changes in the pulp chamber that occur during the polymerization of bulk-fill, flowable bulk-fill, and dual-cure resin restorative materials influenced by various light-curing devices at different curing tip distances. Materials and methods:In the present in vitro study, dentin discs of 1 mm thick and Teflon molds with a cylindrical cavity of 2 mm diameter with lengths of 3, 4, and 5 mm were used to simulate tooth structure with a prepared occlusal cavity.Teflon molds were restored with 2 mm Spectrum (universal microhybrid composite Dentsply), Tetric N flow (Bulk Fill Ivoclar-Vivadent), and Cention N (self-curing resin based with light-curing option Ivoclar-Vivadent), respectively, the remaining difference in the length of the Teflon mold depicts the curing tip distance for the light-curing units.Process of photopolymerization was done with LEDition Ivoclar-Vivadent and 3M™ ESPE™ Elipar™ 2500 halogen curing unit at curing tip distances of 1, 2, and 3 mm, respectively.The thermal changes below the dentin discs were recorded on the K-type digital thermocouple (DT-302-1 HTC).These values obtained were tabulated and submitted to statistical analysis using analysis of variance (ANOVA) and Tukey's multiple post hoc procedures.Results: Significant differences were observed in the temperature rise among bulk-fill, flowable bulk-fill, and dual-cure resin (p < 0.05).Halogen curing unit exhibited significantly higher temperature rise than LEDition (p < 0.05).The smallest rise in temperature was observed in Spectrum composite with LEDition.Conclusion: The polymerization process and the amount of temperature rise are important in pulpal health.Even though there was a significant rise in temperature of the pulp, it had no significance in causing irreversible changes to the underlying tooth structures, which is attributed to improved properties of the materials.
Institution: GITAM University
Language: English
Subfield: General Dentistry
Field: Dentistry
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W3164570842