Comparison of temperature rise within pulp chamber during light curing of composite restoration

Abstract

In this study, total of 60 extracted human teeth were divided into four groups. Group I and II were subjected to LCU A (2550 mW/cm2) and Group III and IV to LCU B (700 mW/cm2), respectively. The increase in temperature level from baseline was recorded using K type thermocouple while curing of dentin bonding agent and composite resins. The temperature rise was significantly higher for Light Curing Unit A which had higher intensity light than Light Curing Unit B. Remaining dentin thickness of the prepared tooth also has significant role in the temperature rise. Hence, light curing units should be used with caution to avoid over‐exposure of teeth. Dental practitioners need to prepare teeth with silicone indices and pre‐assessment of radiographs to avoid over‐preparation. Regular check of intensity of light curing unit using commercially available intensity meter is advocated.