Resistência de união e características interfaciais de pinos de fibra de vidro convencionais e associados a luva de fibra de vidro em canais radiculares regulares ou alargados

Abstract

The use of fiberglass-reinforced posts is well-established in the rehabilitation of endodontically treated teeth with extensive loss of crown structure. Recently, “universal” fiber posts have been introduced to facilitate the use and indication of these components. Thus, the general objective of this study was to evaluate different types of fiberglass posts associated with a fiberglass sleeve, of universal size or reduced size, compared to fiberglass posts used with conventional re-anatomization techniques, through bond strength tests and analysis of voids and porosities using micro-computed tomography (Micro-CT). The study was divided into 3 specific objectives: Objective 1- To evaluate the interface, bond strength and failure pattern in endodontically treated bovine roots, flared or regular, rehabilitated with different types of fiberglass posts (Splendor Sap and Exacto). Objective 2 - To evaluate the interface, bond strength and failure pattern of endodontically treated bovine roots rehabilitated with small diameter fiberglass posts associated or not with fiberglass sleeves. Objective 3 - To evaluate, by means of Micro-CT, the rehabilitation of flared or regular, with cementation of conventional fiber posts, conventional re-anatomized posts and fiberglass posts associated with fiberglass sleeves. It can be concluded that the evolution of fiber-reinforced posts has enabled new alternatives regarding the use of this material in a more simplified way, seeking to facilitate its clinical use, as well as more conservative alternatives that avoid additional wear to the remaining dentin. Fiberglass sleeves are a good alternative to relining (re-anatomization) of conventional fiber posts in cases of roots with flared and regular canals and small diameter fiber posts are a good option for small diameter or atretic root canals.