Influência da água ozonizada como solução de limpeza dentinária na resistência de união de pinos de fibra de vidro

Abstract

The purpose of this study was to evaluate, in vitro, the effect of ozonated water as a cleaning solution on the bond strength of glass fiber pins. Ninety-eight bovine roots were used, divided randomly into 7 groups, according to the irrigation and dentin cleaning solution: HP/HP – 2,5% sodium hypochlorite, AD/AD - distilled water;; CHX/CHX - 2% chlorhexidine; AO/AO - ozonated water 4 ppm; HP / AD – 2,5% sodium hypochlorite and distilled water; HP / CHX - 2.5% sodium hypochlorite and 2% chlorhexidine and, HP / AO – 2,5% sodium hypochlorite and 4 ppm ozonated water. The root canals were prepared endodontically according to the irrigating solutions of each group and stored in distilled water. After 7 days, they were cleared and cleaned according to cleaning solutions. The fiberglass pins were cemented using self-adhesive cement. After 7 days of cementation, the roots were sectioned (6 discs each) and submitted to the push-out test. The analysis of the type of fracture was done with a stereoscopic magnifying glass of 4,5x. Data were analyzed statistically by ANOVA and Tukey tests with a significance level of 5%. The highest mean of push-out union strength in the cervical third was obtained in the AO (11,67), HP (11,21) and HP / AO (9,71) groups, maintaining this same tendency in the middle and apical thirds. The AO and HP were the most relevant solutions in the treatment of root dentin.