JIDAM
"An Official Journal of IDA - Madras
Branch" ©2019.
Available online
Background: Regarding the optimal time to etch primary dentin and how it affects the bond strength of adhesive restorative materials, there are contradictory findings. Aim of the study: Evaluate the impact of various etching times on the primary dentin's tensile bond strength. Materials and methods: Human primary molars that had been extracted or exfoliated and free of caries were split into buccal and lingual/palatal halves. Each sample was mounted on a 1 × 1 inch acrylic block. Samples were randomly assigned into 4 groups, each of which had 10 samples. 10% phosphoric acid was used to etch groups 1, 2, 3, and 4 for seven, ten, fifteen, and twenty seconds, respectively. After applying the bonding agent a composite resin rode was constructed on the demarcated, etched area of the tooth. Tensile bond strength was assessed using a universal testing machine. For intergroup comparison, an ANOVA test was performed. p value 0.05 was set as statistically significant. Results: Group 1, with an etching time of 7 seconds, showed the highest tensile strength, followed by Group 2 of 10 seconds, Group 3 of 15 seconds, and Group 4 of 20 seconds which was statistically significant with p value 0.01. Conclusion: Reducing the acid etching time improves the primary dentin's tensile strength. Because of their limited cooperation, children benefit greatly from shorter etching time.
Tensile bond strength, Etching, Primary tooth
Volume No: 12, Issue No: 3