Abstract
The objective of this project is to quantitatively evaluate in vivo the effect of antimicrobial photodynamic therapy in the treatment of experimentally induced periapical periodontitis. Will be used 70 premolars of dogs (140 roots) which, after induction of periapical lesions, will be divided into 8 groups: In groups I and V (20 roots each) after biomechanical preparation, the root canals…