Efeito férula em dentes tratados endodonticamente : uma revisão sistemática e meta-análise

Abstract

The aim of this study was to conduct a meta-analysis evaluating the effect of ferrule and associated factors in fracture resistance and survival of endodontically treated teeth. A systematic review was conducted in accordance with the PRISMA statement, to evaluate the effect of ferrule in the restoration of endodontically treated teeth in both clinical and laboratory studies. Two databases (PubMed and Scopus) were used to search for articles. There were no restrictions on language or publication date, and the last search was conducted in November 2014. A meta-analysis between specimens with and without ferrule for laboratory studies and 3 subgroup analyzes (ferrule height, post type and type of tooth) was performed. For clinical studies, the Kaplan-Meier method was used to determine survival of restorations and log - rank test was used to find differences between groups (p < 0.05). In laboratory studies it can be seen that the teeth without ferrule had a lower fracture resistance value. In subgroup analysis, regardless of the type of the tooth or restorative strategy presence of ferrule improved strength, and the greater the ferrule the greater was fracture resistance. For the clinical studies we observed that the teeth with ferrule had better longevity. However, the height of the ferrule does not seem to be related to survival in anterior teeth. The presence of ferrule is responsible for an improvement in the performance of the restoration of clinical and laboratory studies. However, other factors may be associated with ferrule in anterior teeth and need to be further investigated.