Assessment of Heat Elevation on the External Root Surface during Intra-Canal 980 nm Diode Laser Irradiation
Author(s): Sarah Jamal Abass*, Hussein A Jawad and Balsam Saadi Abdulhameed
Abstract
Background: Endodontic therapy has recently seen the development of new procedures that have the potential to improve success rates. The lasers in endodontic therapy have been improved by laser application. Aims: The goal of this study was to evaluate the increase in the root's outer surface temperature with the usage of a 980 nm diode laser (DL). Materials and methods: 30 premolars with an 8mm root canal length have been used in the present study. The teeth were randomly sorted into three groups (A), (B), and (C). Each group consisted of 10 teeth. Canal preparation was made then treated for 8 secs with a continuous mode 980 nm DL. The DL treatment began 1mm below the apex and progressed upward at a rate of 1mm per sec in a helical motion. The power of the DL was 1watt (w), 1.5w, and 2w for groups (A), (B), and (C), respectively. The temperature elevation of each tooth was recorded by a thermal coupler. The DL application was done at room temperature. The mean temperature changes for each tooth and for each group were recoded. Results: The means of temperature elevation in Celsius degree were 2.85, 5.38, and 6.99 for groups (A), (B), and (C), respectively. The temperature rising due to using the 1 w 980 nm DL was significantly lower than the two other 980 nm DLs that used in present study. Conclusions: The 1w 980 nm DL can be considered safe for root canal therapy since the thermal elevation was in an acceptable.