سجاد عابدزاده

The creation and continuation of a wound resulting from surgery can cause various complications, including pain, swelling, inflammation, infection, dysfunction, delay in the treatment process, and lack of beauty. Therefore, the aim of the present study was to determine and investigate the effect of low-power laser treatment on complications after crown lengthening surgery.

The present double-blind clinical trial study was conducted in 2020-2021 on 12 patients who needed crown lengthening surgery on two premolar teeth on both sides of the jaw. Immediately after the surgery, and on the first and third day after the surgery, each volunteer randomly received laser radiation on one side of the jaw. On the other hand, radiation was not performed despite the placement of the device in the mouth. Tissue edema and tissue color were evaluated on the first, third, and seventh days after surgery. Pain intensity assessment was also done 24, 48 and 72 hours after surgery. Data were analyzed using Kendall, Friedman and Mann-Whitney tests.

The improvement of tissue edema in the irradiated group was significant compared to the non-irradiated group during the first week (P=0.00), but the improvement in tissue color did not show a significant difference between the two groups (P=0.057). The difference in pain intensity 24, 48 and 72 hours after surgery was not significant among the groups (P=0.707, 0.812 and 0.974) and the improvement of pain intensity during consecutive days was not significant in the irradiated group (P=0.164).

In the present study, low-power laser did not have a significant effect on improving tissue color and reducing pain after crown lengthening surgery in the case group compared with the control group, but it was effective in improving tissue edema after surgery.