Abstract
Objective: To evaluate the use of bulk fill composite resins (RCBF) demonstrating their indications and highlight the technique of their procedures with respect to resistances and contractions in photoactivation. Methods: This was a literature review, with a descriptive and informative approach, where the formulation process was through searches for scientific literature in databases, having as descriptors: The importance of the composite resin, the form of polymerization, irradiation power and hardness. Results: In contrast to conventional composite resins, often targeted for addition in 2mm increments at the extreme, RCBF expressed better vigor patterns. However, regarding the polymerization shrinkage, the RCBF showed a small volumetric modification with protoactivation. These results are probably due to the dissimilarity of the composite elements and the technique established in the photoactivation equipment. Final Considerations: RCBFs are recommended for restoration of posterior dental elements. However, the hardness and constriction of polymerization reactions are directly linked to the period and effectiveness of the photoactivator irradiation emission. Longitudinal clinical studies are essential for the conjecture of FHR behavior.