Modern Restorative Dentistry today successfully capitalizes on the advances in the rapid evolution of adhesive systems, both in terms of materials and application techniques. Current patient requirements for aesthetics of restorations, as well as the development of adhesive techniques, have imposed composite diacrilic resins (DRCs) as selective materials for direct composite restorations. The contraction of polymerization as well as the stress of the polymerization contraction manifested inside the composite can compromise adhesion between the obturation and the dental tissue, with the appearance of the marginal microinfiltration phenomenon with all the known negative effects such as the occurrence of marginal stains, secondary caries and even pulp necrosis. Numerous studies on the adhesion of materials to dental structures have the objective of knowing and eliminating as far as possible the causes of degradation of the adhesive interface. In this note are also written the authors of this article, whose experimental results provide useful information regarding the influence and evaluation of the contraction stress on the polymerization of the restorative composites and different adhesive system.
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