Evaluación de la adaptación marginal de incrustaciones en resina compuesta cementadas con cemento resinoso dual y resina precalentada

Abstract

The main cause of failure of inlays is microleakage associated with marginal seal, which can be related to the type of cement used. There are multiple types of cements available on the market; however, their choice has been controversial in recent years. Aim: yo evaluate the marginal fit of composite resin inlays cemented with preheated resin and dual-cure resin cement. Materials and Methods: an in vitro experimental study was conducted using 30 premolars with healthy crowns. They were divided into two equal groups (n=15) for the subsequent cementation of resin inlays. Group 1 was cemented with preheated resin (ENA Micerium) and Group 2 with resin cement (Duolink, Bisco). A measurement of the gap between the restoration and the tooth was immediately carried out using a scanning electron microscope, and they were subjected to thermocycling (10,000 cycles) simulating one year of aging. Subsequently, the measurement process was repeated, allowing for a comparison between these values. Results: the resin cement showed a median initial misfit of 86.3 µm and 105.7 µm after being subjected to the aging process, resulting in greater deterioration of the material over time compared to the preheated resin, which remained more stable, with a median initial misfit of 83.2 µm and 88.3 µm after one year. Conclusions: The preheated resin showed better marginal fit values compared to the resin cement at time zero and after one year.