EFFECTIVENESS OF ANTIOXIDANT PSIDIUM GUAJAVA L LEAF EXTRACT TO MINOR TYPE RECURRENT STOMATITIS AFTOSA (RAS): EFEKTIVITAS ANTIOKSIDAN EKSTRAK DAUN PSIDIUM GUAJAVA L TERHADAP STOMATITIS AFTOSA REKUREN (SAR) TIPE MINOR. Dentika Dental J. 2016;19(2):142-148. doi:10.32734/dentika.v19i2.418