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VOLUME 7 , ISSUE 1 ( January-June, 2022 ) > List of Articles

ORIGINAL RESEARCH

Microtensile Bond Strength of Packable and Flowable Bulk-fill Composite Resin-based Restorative Materials to Dentin

Vibha Hegde, Mrunalini J Vaidya, Komal Sanjay Jadhav

Keywords : Bulk-fill composites, Microtensile bond strength, Universal testing machine

Citation Information : Hegde V, Vaidya MJ, Jadhav KS. Microtensile Bond Strength of Packable and Flowable Bulk-fill Composite Resin-based Restorative Materials to Dentin. J Oper Dent Endod 2022; 7 (1):6-10.

DOI: 10.5005/jp-journals-10047-0123

License: CC BY-NC 4.0

Published Online: 21-08-2023

Copyright Statement:  Copyright © 2022; The Author(s).


Abstract

Aim: Comparative assessment of microtensile bond strength of packable and flowable bulk-fill composite resin restorative materials to dentin in a Class II cavity. Materials and methods: Standardized independent class II tooth preparations were done involving both the proximal surfaces of 126 teeth to prepare 252 specimens. The 252 specimens were divided into seven groups of 36 specimens each as follows: group I—Filtek Z350XT packable conventional composite resin, group II—Filtek Bulk-Fill, group III—Tetric-N-Ceram Bulk-Fill, group IV—everX Posterior highly viscous fiber reinforced bulk-fill, group V—SDR Plus bulk-fill flowable, group VI—Tetric N Flow flowable bulk-fill, group VII—Filtek Bulk-Fill flowable. For group I, the mesial and distal cavities were etched with 37% phosphoric acid for 20 seconds followed by the application of single bond universal bonding agent. The cavities in group I were restored by 2 mm incremental placement of conventional nanofilled composite resin and light cured for 20 seconds. For group II–VII, the cavities were restored by bulk-fill composite resin-based restorative materials in a single increment of 4 mm and light polymerized for 20 seconds. The restored specimens were sectioned using a diamond disc creating a 1 mm thick slabs. The evaluation of the microtensile bond strength (µTBS) was done using the universal testing machine until debonding occurred at the dentin restoration interface. Results: A statistically highly significant difference was observed in the values among the groups (p < 0.01) with the highest values in group II and the least in group VII. Conclusion: The bulk-fill packable composite resin-based restorative materials were found to have highest µTBS as compared with the other bulk-fill composite resin-based restorative materials.

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