Oral hygiene associated with antimicrobial photodynamic therapy or lingual scraper in the reduction of halitosis after 90 days follow up: A randomized, controlled, single-blinded trial.

Background: Although antimicrobial photodynamic therapy (aPDT) can reduce halitosis immediately after application, it returns after a week. This probably occurs because bacteria residing in the oral cavity may recolonize the dorsum of the tongue.

Objective: Verify if modification of oral hygiene behavior associated with aPDT or lingual scraper can reduce halitosis after a 90-day follow-up.