A Scanning Electron Microscopic Study Comparing the Marginal Adaptation of Different Bulk Fill Composites in a Class...

To compare marginal adaptation of bulkfill low shrinkage composite in a class II cavity under scanning electron microscope.

52 extracted human molars were stored in the saline. Class II cavities were prepared extending 1mm below CEJ. The teeth were randomly assigned to 4 groups (n = 13). GROUP 1- Tetric N Ceram, GROUP 2- SDR, GROUP 3- Sonicfill, GROUP 4- Filtek bulkfill. All the cavities were then restored with the composite according to each manufacturer's instructions and they were polished using flexible polishing discs. The teeth were sectioned labiolingually, mesial halves of the tooth samples were observed under SEM for marginal adaptation, and distal halves were thermocycled and observed under SEM.

Marginal adaptation seen in both SDR and sonicfill was better when compared to Tetric N Ceram and Filtek bulk fill and also all four experimental groups showed better enamel adaptation when compared to the adaptation in the cementum.