The result: In the coronal region, the lowest temperature changes (DT) were measured during the continuous mode, with a median temperature increase of 0.56 ± 0.67°C compared to 3.44 ± 2.22 °C using the segmented procedure. The highest temperature changes (DT) (12.14 ± 4.43 °C) were measured in the laser method without irrigation solution in the root canal.

In the middle region of the root canal, the following temperature changes (DT) were measured: 0.71 ± 0.80 °C for the continuous irrigation method; 2.98 ± 1.21°C for the segmented method; and 8.11 ± 3.12 °C for the control method without irrigation solution.

At the apical area of the root canal, the following temperature changes (DT) were measured: 1.89 ± 1.42 °C for the continuous irrigation method; 1.32 ± 0.76 °C for the segmented method; and 6.30 ± 3.39 °C for the control method without irrigation solution in the root canal.

The conclusion: The study demonstrated that the LiteTouch™ Er:YAG laser combined with the LiteTouch™ Endo tip in the root canal with irrigation, produced a minimal temperature change of 0.5–2 ^◦C. Thus, this study recommends that the laser treatment be performed with an irrigation solution to optimally clean the root canal and avoid thermal damage to the surrounding tissue.

To read more about lasers in Endodontics go to https://light-inst.com/applications/endodontics/