The Effect of Two Lasers, Lx16, and Denlase on the Rise of Temperature on the External Root Surface of the Root Canals: An In Vitro Study

Aim:The aim is to assess the impact of LX16 and DENLASE lasers on the increase in temperature on the external surface of root canals. Materials and Methods:The selected sixty single-rooted extracted teeth were chemomechanically prepared.The specimens were then irradiated using LX16 and DENLASE lasers at power settings of 1.15, 1.45, and 1.85W, and two application times of 20 and 60 seconds, in continuous wave (CW) mode.The specimens were divided into two main groups: Group A, which received LX16 laser irradiation, and Group B, which received DENLASE laser irradiation.Each group was further subdivided into subgroups based on the irradiation power level and application time.The peak temperatures at the middle and apical regions of the root surface were measured using a thermocouple and a digital thermometer. Results:The results showed that the temperature rise on the root surface, at all the tested output powers, was below 7°C.The highest temperature value was observed in the apical region when the root canal was irradiated for 60 seconds at an output power of 1.85W. Conclusion:Based on these findings, it is concluded that, within the limitations of the in vitro experiment, LX16 and DENLASE lasers with wavelengths of 976 and 810 nm, respectively, can be safely used for endodontic purposes using the studied parameters of 1.15, 1.45, and 1.85W power levels and application times.