Comparative Evaluation of Depth of Cure between Two Bulk-fill Composites and a Conventional Resin Composite: An In Vitro Study
Meera Bastian, RV Vineet, Josey Mathew, Sinju Paul, Tom P Varghese
Citation Information :
Bastian M, Vineet R, Mathew J, Paul S, Varghese TP. Comparative Evaluation of Depth of Cure between Two Bulk-fill Composites and a Conventional Resin Composite: An In Vitro Study. Cons Dent Endod J 2020; 5 (2):23-27.
Aim and objective: To evaluate and compare the depth of cure of two bulk-fill composites with a conventional composite. Materials and methods: A sample size of 36 was taken and divided into three groups based on the type of composite. Standardized cylindrical stainless steel molds were prepared with 8 mm diameter and 10 mm depth. Measurement of depth of cure by the scraping method was performed according to the ISO 4049 (2009). After placing the specimens, the mold was pressed with polyester strips covered by glass slides and curing was initiated using Bluephase 20i (Ivoclar Vivadent US) light-curing unit through the glass slide. Immediately after curing, the specimens were removed from the mold and the uncured part of the specimens was removed by scraping with a plastic spatula. The absolute length of the hardened composite specimen was measured using a digital vernier caliper. The measured length was divided by two and recorded as the ISO depth of cure. Results: The depth of cure of the composite specimens was found to be higher for Voco Xtra Fil bulk-fill composite than for Shofu Beautifil bulk-fill composite and Filtek Z350 XT conventional composite (3M/ESPE). Conclusion: Within the limitations of the study, it can be concluded that the placement of bulk-fill composites with 3-mm increments is mandatory for complete curing. Clinical significance: Depth of cure of bulk-fill composites determines the adaptation of restoration to the tooth structure, and this study aims to evaluate two newly introduced bulk-fill composites using scrape test.
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