Introduction: This in vitro study was designed to measure and compare the amount of temperature rise in the pulp chamber of the teeth exposed to different light curing units (LCU), which are being used for curing composite restorations. Methods: The study was performed in two settings; first, an in vitro and second was mimicking an in vivo situation. In the first setup of the study, three groups were formed according to the respective three light curing sources. i.e. quartz-tungsten-halogen (QTH) unit and two light-emitting diode (LED) units (second and third generations). In the in vitro setting, direct thermal emission from three light sources at 3 mm and 6 mm distances, was measured with a k-type thermocouple, and connected to a digital thermometer. For a simulation of an in vivo situation, 30 premolar teeth were used. Class I Occlusal cavity of all the teeth were prepared and they were restored with incremental curing of composite, after bonding agent application. While curing the bonding agent and composite in layers, the intrapulpal temperature rise was simultaneously measured with a k-type thermocouple. Results: The first setting of the study showed that the heat produced by irradiation with LCU was significantly less at 6 mm distance when compared to 3 mm distance. The second setting of the study showed that the rise of intrapulpal temperature was significantly less with third generation LED light cure units than with second generation LED and QTH light cure units. Conclusion: As the distance from the light source increases, less irradiation heat is produced. Third generation LED lights cause the least temperature change in the pulp chamber of single rooted teeth.
Keywords: LED dental curing lights; LED lights; QTH units; intrapulpal temperature rise; pulp chambers; temperature; third generation LED lights.
Comparison of Temperature Rise in the Pulp Chamber With Different Light Curing Units: An In-Vitro StudyAV Rajesh Ebenezar et al. J Conserv Dent 13 (3), 132-5. PMID 21116387.Temperature rise caused due to light curing units does not result in irreversible pulpal damage.
Characterization of Heat Emission of Light-Curing UnitsMA Wahbi et al. Saudi Dent J 24 (2), 91-8. PMID 23960535.The PAC curing unit induced a significantly higher heat emission and temperature increase in all periods, and data were statistically different than the other tested grou …
Temperature Rise Induced by Some Light Emitting Diode and Quartz-Tungsten-Halogen Curing UnitsE Asmussen et al. Eur J Oral Sci 113 (1), 96-8. PMID 15693836.Because of the risk of thermal damage to the pulp, the temperature rise induced by light-curing units should not be too high. LED (light emitting diode) curing units have …
Comparison of Temperature Changes in the Pulp Chamber Induced by Various Light Curing Units, in VitroAR Yazici et al. Oper Dent 31 (2), 261-5. PMID 16827031.This study compared the temperature increase in a pulp chamber as a result of using various light-curing units during resin composite polymerization, and it determined th …
Pulp Chamber Temperature Rise During Curing of Resin-Based Composites With Different Light-Curing UnitsK Durey et al. Prim Dent Care 15 (1), 33-8. PMID 18198059. - Randomized Controlled TrialThe results support the view that there is a potential risk for heat-induced pulpal injury when light-curing RBCs. The risk is greater during bonding and with high energy …
Cited by 1 PubMed Central articles
Pulpal Temperature Rise: Evaluation After Light Activation of Newer Pulp-Capping Materials and Resin CompositeJ Lakhani et al. Contemp Clin Dent 9 (4), 644-648. PMID 31772478.Temperature rise in the pulp chamber after light activation of newer pulp-capping materials and composite was below critical threshold for irreversible pulpal damage. Amo …