DOI: 10.36347/sjds.2022.v09i05.004

Pages: 100-111

Aim of the Study: Chemomechanical caries removal using carisolv has been discussed as an alternative method to a conventional excavation system. The purpose of this in vitro study was to evaluate the influence of two caries removal techniques (conventional bur, and Chemomechanical removal/Carisolv™) on dentine shear bond strength (SBS) using SEM. Materials and Methods: The sample consisted of forty recently extracted permanent human molar divided into four groups. 30 Molars with coronal dentine caries extending approximately half-way through the dentine were randomly divided into three equal groups. Group 1: Caries was removed using Carisolv and the dentine surfaces of the sample was etched before applying composite bonding agent. Group 2: Caries was removed using carisolv without etching the dentine surface before applying bonding composite resin. Group 3: Caries was removed using a low-speed burs and hand excavation. Group 4: the Control Group consists of ten molars with Sound occlusal dentin surfaces. After preparing the sample they were subjected to thermo cycling for 500 cycles at 5-55°c with dowel time 15 seconds, and then they were tested in INSTRON device for SBS tests. Scanning electron microscopy was used to ascertain the kind of failure at the composite dentine interface. Data were analyzed by ANOVA and Bonferroni tests (P = 0.05). Results: Results showed that there was no different in bond strengths between Carisolv group and sound dentin group which were higher than the bond strength of mechanical group and Carisolv group without etching (P = 0.05). Failure at the level of restoration material was cohesive specially with sound dentine samples which have the higher bond strength. Conclusions: Chemomechanical caries using Carisolv enhanced the bond strength to dentine surface comparing with mechanical caries removal.