Influence of Ozonated Water and Photodynamic Therapy on the Bond Strength of Anatomical Fiberglass Posts to Root Dentin. An In Vitro Study

Abstract

ABSTRACT This study evaluates, in vitro, the effects of ozonated water as auxiliary endodontic irrigating and photodynamic therapy on the bond strength of fiberglass posts to root dentin. Sixty bovine incisors were prepared and divided into six groups (n=10):Oxidation only G1 Distilled water G2 5.25% NaOCl G3 10–15mg/L O3. Ox+PDT G4 DW+PDT G5 NaOCl+PDT G6 O3+PDT. Anatomical fiberglass posts were cemented and the roots were sectioned and submitted to the push-out test. Bond strength values were analyzed with two-way ANOVA and Tukey 5%. Failure patterns were analyzed. Sodium hypochlorite and ozonated water without photodynamic therapy showed the highest bond strength, and sodium hypochlorite with photodynamic therapy had the lowest bond strength. The O3+PDT association showed intermediate results. Considering that the main purpose of the O3 is disinfection, it was noted that ozonated water did not interfere on the bond strength of fiberglass posts to root dentin. Photodynamic therapy affected bond strength, mainly when associated with sodium hypochlorite. The ozonated water increases the PDT bond strength results.