Laboratory evaluation of fracture resistance of upper central incisors restored with three glass fiber posts

Endodontically treated teeth are weaker than intact teeth. Use of fiber-reinforced composite resin posts in the treatment of these teeth can result in an integrated post-and-core complex because of the similarity of physic-mechanical properties of these posts to dentin. The aim of this study was to evaluate fracture resistance of teeth restored with three different types of glass fiber posts. Thirty extracted human upper central incisor teeth، which were similar in size، were selected and divided into three groups (n = 10). In all the groups the crowns were sectioned 2 mm above the CEJ and endodontic treatment was carried out. Then HtCo، Anthogyr، Sevenska، and posts were cemented with Panavia cement in groups 1، 2 and 3، respectively، and restored with composite resin. Fracture resistance of the samples was measured in a universal testing machine. Data were analyzed with ANOVA (α = 0. 05). The means of fracture resistance values in HtCo (1)، Antthogyre (2) and Sevenska (3) groups were 564. 74 ± 213. 59، 629. 12 ± 390. 33 and 779. 84 ± 282. 59 N، respectively، with no significant differences between the groups (p value = 0. 285). Restorations carried out with Iranian fiber glass post (HtCo) exhibited fracture resistance similar to two other imported posts.