Adaptación y resistencia compresiva de dos materiales en elevación de margen cervical en restauraciones en resina de terceros molares superiores

Abstract

Problem: Proximal caries that extend below the enamel cement bond and expose the cervical margins below the gingival tissues are challenging, due to the difficulty of accessing this area to adequately prepare the cavity, ensure appropriate impressions and apply adhesive bonding procedures. Objective: In this research, an analysis of the materials used to fill the interproximal cavities and their interaction with the final resin is carried out, focusing on two specific characteristics, resistance to compression and mismatch. Method: 60 dental specimens of upper third molars with class 2 caries affecting the occlusal surface in pits and fissures and a distal tray extending 2 mm below the cervical line were prepared. They were divided into three groups, without elevation of the cervical margin, with elevation of the cervical margin with resin, and with elevation of the cervical margin with glass ionomer filling the gingival cavity subjected to a force of 800 Newtons, confirming the resistance and degree of adaptation of these. filling materials with the final restoration. Results: Regarding the fractures of the samples, it is important to highlight that only 20% were fractured, that is, a total of 12. Of that amount, 3 were fractured in the dental substrate, 3 in the resin and fluid, and one total of 6 in Equia forte glass ionomer. Conclusion: The maladaptation indicates that in the samples with the elevation process a greater maladaptation is evident than in the direct restoration, because 75% of the samples with margin elevation show maladaptation in the coronal Fx, the tooth and the restoration and restoration and elevation, against only 30% of the samples with restoration that suffer a mismatch between the tooth and the restoration.