Comparative Study Between Photodynamic Therapy with LED Associated with Probiotics in the Treatment of Halitosis

Participant will be taught on how to correctly brush their teeth, use dental floss and scrape their tongues at home.

A weekly aPDT session will be performed for a period of 30 days, with the photosensitizer (PS) annatto manipulated at a concentration of 20% (Fórmula e Ação®). 2 ml (quantity measured with a pipette) will be applied to the middle third and dorsum of the tongue for 2 minutes for incubation (pre-irradiation time). The excess will be removed with a suction device in order to keep the surface moist with the PS itself. Six points will be irradiated with a distance of 1 cm between them, considering the light scattering halo; the LED will be positioned at a distance from the tongue so as to form a 2 cm halo at each point. The device will be previously calibrated with a wavelength of 395-480 nm, for 20 seconds per point, energy of 9.6 J.

Probiotic lozenges containing Streptococcus salivarius K12 (BLIS K12®) (OralBiotic; Master Products, Fort Lauderdale, Florida, United States) will be used. Each patient will receive 60 lozenges, which should be allowed to dissolve slowly and completely in the mouth. Patients are instructed to use the lozenges twice a day for a period of 30 days.