Restaurações semi-diretas em resina composta para dentes posteriores: um guia clínico

Several factors are related to the success of posterior teeth restorations, whether direct, semi-direct or indirect. In direct restorations, the greatest limitations are related to the extension of the cavity preparation, complete polymerization of the composite resin, adequate marginal adaptation, anatomy, and reestablishment of the contact point, besides to adequate finishing and polishing. Clinical research and systematic reviews indicate that the survival of indirect composite resin restorations does not differ from those in ceramics. Therefore, the objective of this paper is to present a clinical guide for the manufacture of posterior semi-direct restorations in composite resin that can be made by the dentist in the office. The technique consists in making the plaster work model and isolating the preparation with a thin layer of sculpture wax. The simplified restorative step begins with just two composite resins, one of which is hyperpigmented dentin and the other of enamel. The sculpture takes place through the design of the main and secondary grooves, being able to use dyes at the bottom of the grooves to highlight them and give depth to the cusps. After finishing and polishing the part is ready to be cemented. The aesthetic and functional result demonstrated that technique can be an easy and economical alternative for rehabilitation of posterior teeth with great loss of dental structure.