%0 Journal Article
%T In Vitro Fracture Strength of Teeth Restored with Lithium Disilicate Onlays with and without Fiber Post Build-Up
%A Alberto Fasiol
%A Francesco Mollica
%A Nicola Mobilio
%A Santo Catapano
%J -
%D 2018
%R https://doi.org/10.3390/dj6030035
%X Abstract To our knowledge there is no data about the mechanical performance of indirect restoration adhesively cemented on teeth without an adequate build-up to provide the correct geometrical configuration. The aim of this study was to compare the fracture strength of human teeth restored with lithium disilicate onlays, with and without fiber post build-up. Methods: Twenty human mandibular molars were horizontally sectioned and divided into two groups ( n = 10). No treatment was applied in group A. Teeth in group B were endodontically treated, built-up using fiber post and composite core and prepared with a circumferential chamfer providing a 1 mm circumferential ferrule. Lithium disilicate onlays were pressed and luted on teeth using dual-curing luting composite. Teeth were tested under static load. Failures were classified as restorable or not restorable. Failure loads were analyzed with one-way analysis of variance. Failure modes were compared using Pearson¡¯s Chi-square tests. Results: The mean fracture loads were 1383.5 N for group A and 1286.3 N for group B. No difference was found ( p = 0.6). Ninety per cent of fractures were classified as not restorable in both groups, with no difference ( p = 0.8). Conclusions: For teeth restored with adhesive procedures and lithium disilicate onlays, the presence of build-up with fiber post to provide retention and resistance form does not influence the fracture strength. View Full-Tex
%K all-ceramic
%K ferrule effect
%K fracture test
%K lithium disilicate
%K onlays
%K build-up
%K post-and-core build-up
%U https://www.mdpi.com/2304-6767/6/3/35