ADA Professional Product Review: Laboratory evaluation of 12 bulk-fill composites
This summary is based on the ADA Professional Product Review: A Laboratory Evaluation of Bulk-Fill Versus Traditional Multi-Increment-Fill Resin-Based Composites
The Review can be accessed through the ADA website
- Unlike traditional composites, which typically are placed in maximum increments of 2 millimeters (mm), bulk-fill composites are designed to be placed in 4 mm, or sometimes greater, increments.
- Manufacturers claim that bulk-fill materials have greater depth of cure and lower polymerization induced shrinkage stress thanks to technology like “polymerization modulators,” which they say allow a certain amount of flexibility and optimized network structure during polymerization.
- Studies have demonstrated some comparable physical and mechanical properties among a handful of bulk-fill and traditional composites.
Purpose of the Study
The study evaluates more in-depth physical and mechanical properties of currently marketed bulk-fill materials in comparison to one another and to traditional composites.
- This evaluation compared several properties of bulk-fill versus multi-increment–fill, resin-based composites and found performance of restoratives in both categories to be acceptable according to an international standard, with the exception of depth of cure and hardness.
- Three of the bulk-fill resin-based composites did not achieve adequate depth of cure when tested according to the standard (SonicFill, Tetric EvoCeram Bulk Fill, and Alert Condensable Composite).
- All products but one (Alert Condensable Composite) demonstrated adequate hardness after curing in a subsequent test (Knoop hardness test).
- With the exception of depth of cure and Knoop hardness, we found the laboratory performance of bulk-fill resinbased composites to be comparable to that of traditional multi-increment–fill resin-based composites.
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