Laser and curing light induced in vitro pulpal temperature changes

Objective: This study was conducted to compare in vitro pulp chamber temperature changes induced by conventional curing light and argon laser under common conditions. Summary Background Data: Previous in vitro studies have shown that impacting the surface of teeth with either an argon laser or conventional curing light causes pulp temperature increases of various degrees. Methods: The sample tooth had a class V composite restoration placed with 2.48-mm distance from the surface of the composite to a Thermister Thermometer, The thermometer was inserted into the cutaway pulp chamber to measure the temperature increase from stabilized room temperature, which was caused by exposure to argon laser or conventional curing light. Results: Temperature increases for the argon laser for the recommended curing time were 3 degrees F or less. The longer the exposure times for either method of curing, the higher the temperature increased. Conclusion: At recommended curing times, in vitro pulp chamber temperature increases from laser units were significantly lower than those of the conventional curing lights.