É possível alcançarmos a blindagem coronária em dentes tratados endodonticamente? – revisão de literatura Is it possible to achieve coronary shielding in endodontically treated teeth? – literature review

The coronary shield, known as the intra-orifice barrier, is defined as a placement of a restorative material at the entrance of the root canal orifice after 3mm of gutta-percha and aiming to increase the resistance of the tooth to the fracture in addition to preventing coronary infiltration. Objective: to report and discuss the existing data in the dental literature regarding the materials available to perform the intra-orifice barrier in endodontically treated teethand to indicate if the desired coronary shield is really achievable. Literature review: The materials analyzed were composite resin, glass ionomer cement (CIV), zinc oxide based materials, silver amalgam and mineral trioxide aggregate (MTA). Results: composites of resin and bulkfill / flow in their results when compared with other materials like MTA. Silver amalgam, zinc oxide-based materials, and CIV do not result in terms of intra-orifice barrier. MTA was favorable in relation to microleakage, but did not reinforce a root structure. Conclusion: No material restorer is able to completely protect the infiltrations.However, as conventional composite resins and bulk-fill flow are the materials with the best properties associated with satisfactory results, however, the need for scientific studies comparing the materials used as an intra-orifice barrier.