Objective: MIH affected molars still pose a restorative challenge to the treating clinician with several authors reporting significantly higher rates of adhesive failures of resin-based restorations compared to their sound counterparts. The objective of the study is to compare the 36 months clinical and radiographic performance of direct resin restorations placed with and without prior treatment with a deproteinizing agent.
Materials and Methods: In this parallel group double blind randomized trial, 50 vital first permanent molars, affected with MIH and requiring restorations of at least 2 surfaces, were randomly allocated by stratified permuted block randomization to receive direct resin restorations either with or without deproteinization using 5% sodium hypochlorite (n=25 each). Clinical and radiographic evaluations of the restored molars were carried till 36 months using the USPHS criteria.
Results: At 36 months, overall retention rate was found to be 100% with complete elimination of any pre-existing sensitivity. Cumulative survival rates were found to be 100% in both groups.
Conclusion: Direct composite restorations served as an adequate restorative measure for first permanent molars affected with moderate to severe MIH where the defect was limited to two surfaces and the preparation involved removal of the defect till detection of reasonable resistance in enamel.