Laser Used in the Treatment of Hypomineralized Occlusal Lesions in Teeth Enamel Affected by MIH

Prophylaxis of the selected region for the study with Robson brush and prophylactic paste, washing and drying, followed by application of diode laser (Sirolaser, Sirona Dental Systems GmbH, Bensheim, Germany) with wavelength of 970 nm +/- 10 nm, maximum power of 7 W CW, 1mW guide beam and 320μm optical fiber. Irradiation will be performed on the entire occlusal surface in contact mode, with power of 0.7 W (energy of 70 mJ) and frequency of 10 Hz for 30 seconds, having an energy density of 222.82 J / cm2. The FieldMaxII-TOP power meter (Coherent, Inc, USA) will be used prior to and after the applications. The laser will be applied in a sweeping motion throughout the affected surface, the fiber being maintained positioned perpendicular to the occlusal surface throughout the movement. The irradiation time will be standardized in 30 seconds.

Prophylaxis of the selected region for the study with Robson brush and prophylactic paste, washing and drying with cotton balls, followed by relative insulation with cotton rollers of the tooth in question, application of acid polyacrylic for 15 seconds throughout the surface, light drying with cotton ball, insertion of the high viscosity glass ionomer (Equia Forte in capsule - GC) through a specific applicator, after loss of the gloss of the digital pressure material with Vaseline for due drainage and surface protection of the material, removal of the excess, checking the occlusion with carbon paper, occlusal adjustments if necessary, superficial protection with petroleum jelly.