Experimental substantiation for the safety of the use of laser radiation with a wavelength of 445±40 nm in dental practice

Abstract

The aim of the study was to determine the temperature parameters when exposed to the area of the attached keratinized gum by laser irradiation and to compile clinical recommendations based on the data obtained. The study was conducted on laboratory animals (mature male rats of the Wistar breed) in accordance with Russian and international rules for conducting preclinical studies. The temperature of the keratinized gum was determined by contact method using low level laser therapy (LLLT) at a laser irradiation wavelength of 445±40 nm, a power of 0.5 W with a distance from the tip of the light guide to the gum surface of 2.5—3 mm (group I) and 4.5—5 mm (group II). As a result of the study, it was found that when exposed to low level laser irradiation (LLLI) with a wavelength of 445±40 nm and a distance of 4.5—5 mm from the tip of the light guide to the gum surface, the temperature increase of the gum tissues on average is 8.37±0.296°C, which does not exceed the threshold temperature index. Low level laser therapy with these parameters can be recommended for use in dental practice after conducting appropriate clinical studies.