Zohre Shafigh1, Nazi Zahra Khosravi1, Vadud Ghasemi2, Abolfazl Bagheri3*

Abstract

Background and objective: the effect of low-level laser on reducing pain after oral surgeries such as clinical tooth crown lengthening surgery has not yet been confirmed, and it is a controversial issue discussed in the studies. The aim of this study was to investigate the effect of low-level laser on reducing pain after clinical tooth crown lengthening surgery. Materials and Methods: The study is a clinical trial and the size of the samples consists of 30 patients undergone clinical tooth crown lengthening surgery. 15 patients were treated with laser radiation immediately after surgery, and the rest were treated with placebo laser irradiation. After that, the pain was assessed on the same day of laser radiation, the third day, and the seventh day following the surgery. After collecting data, they were analyzed by SPSS statistical software using t- test. P-values less than 0.05 were considered as statistically significant. Findings: The mean pain score in samples treated with laser therapy after surgery was less than those who were treated with placebo laser radiation, and this difference was statistically significant. (p <0.05). Conclusion: The results of this study indicate that low-level laser can reduce the severity of pain in clinical tooth crown lengthening surgery.