Evaluation of Antimicrobial Photodynamic Therapy as an Adjunct to Periodontal Treatment in Smokers

After Scaling and root planing, periodontal pockets will receive the antimicrobial (aPDT) photodynamic therapy. Shortly phenothiazine hydrochloride photosensitizing is applied at a concentration of 10mg/mL from the pocket bottom to the gingival margin. After 1 minute, irrigation is performed from periodontal pockets with distilled water to remove excess dye. The stained area is then irradiated with a diode laser with 660 nm of wavelength and maximum power of 60 mW/cm², through a fiber-optic probe of 0.6 mm diameter. Exposure to radiation will occur at six sites per tooth under treatment, making the total time of 1 minute per element, or the equivalent of 10 seconds per site. The aPDT applications will be repeated in the same way until the second week in the days 2, 7 and 14.

A sham procedure will be held simultaneously in pairs of contralateral teeth selected that will not receive the aPDT (control group).