The efficacy of four cavity disinfectant solutions and two different types of laser on the micro-shear bond strength of dentin adhesives

Abstract

Objective: The aim of this study, was to investigate the efficacy of four cavity disinfectant solutions and two different types of laser on the micro-shear bond strength of dentin adhesives as in-vitro. Methods: Seventy permanent human molar teeth were sectioned parallel to the occlusal surface to expose dentin in the midcoronal. The specimens were randomly divided into seven main groups (n=10) Then cavity disinfection procedures were applied; Saline(Control); Sodium Hypochlorite (NaOCl); Chlorhexidine Gluconate (CHX); Super-oxidized water (SPO); Aqueous ozone (AO); KTP laser; Er:YAG laser. Then the main groups were randomly divided into two subgroups as self-etch (Clearfil S3 Bond Plus) and etch-and-rinse (Bisco All-Bond Universal) adhesive systems. Four cylinders of composite resin were applied to each bonded dentin surface using a tygon tube. The specimens were tested with universal testing machine. The results were analyzed by two-way ANOVA and Tukey's tests. Results: Statistical comparisons of the groups could be listed respectively from lowest to highest as; self-etch adhesive system, CHX < Control,AO,SPO < KTP < NaOCl < Er:YAG (p < 0.05); etch-and-rinse adhesive system, CHX < Control=AO=SPO < KTP < Er:YAG < NaOCl (p < 0.05). When adhesive systems were compared with each other; there were found statistically significant differences within NaOCl groups, KTP laser groups and Er:YAG laser groups. Conclusions: Er:YAG and KTP laser systems may increase the bond strength of both adhesive systems compared to CHX, SPO and AO. Therefore, both of laser systems may advisable for cavity disinfection in restorative dentistry. © 2018 Cumhuriyet University Faculty of Dentistry.