Análise de importantes aspectos relacionados à cimentação intrarradicular de pinos de fibra: uma revisão de literatura

Abstract

The restoration of endodontically treated teeth with extensive coronal destruction, has become a challenge for clinicians and researchers. A pulpless tooth, most often due to caries, trauma, erosion, abrasion, previous restorations or even by the endodontic access, lost all or most of its reinforcing structures as marginal ridges, oblique ridge and ceiling camera pulp, leading to considerable loss of strength. In such cases, an intraradicular post is usually indicated, which should ideally promotesufficient retention to the restoration. The use of pre-fabricated glass fiber posts and carbon fiber posts have advantages when compared with metal posts. It doesn´t corrose, it reduces the time spent in proceeding, it presents a more favorable failure mode since it displays a modulus of elasticity similar to dentin, and also because of it´s low cost. Many factors are considered important for the retention of the intraradicular fiber posts, including the length, shape and surface configuration of the posts, the material of the post and the type of cement agent used. The objective ofthis study was to review the literature regarding various cementing agents available for fixation of fiber posts, and define some important aspects regarding their cementation, since the most common type of failure in the use of these posts are in their detachment of the root canal. It can be concluded that resin cements are the most commonly used for luting fiber posts, but glass ionomer cements, resin-modified glass ionomer and zinc phosphate may also be employed. The hygroscopic expansion of resin cements and glass ionomer may have an important role in the retention of these posts, especially after twenty-four hours of cementation.