Does MTA affect fiber post retention in repaired cervical root canal perforations?

• Main Authors: Rodrigo Dantas PEREIRA (Author), Manoel BRITO-JÚNIOR (Author), André Luis FARIA- (Author), Karine Rodrigues GUIMARÃES (Author), Laís de Oliveira MENDES (Author), Carlos José SOARES (Author), Manoel Damião SOUSA-NETO (Author)
• Format: Book
• Published: Sociedade Brasileira de Pesquisa Odontológica, 2016-06-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 1807-3107; 10.1590/1807-3107BOR-2016.vol30.0083
• Keywords: Dental Cements; Dental Restoration Repair; Root Canal; Dentistry; RK1-715
• Source: Brazilian Oral Research, Vol 30, Iss 1 (2016)

Abstract This study evaluated the effect of mineral trioxide aggregate (MTA) on the retention of fiber posts in repaired root canal perforations. Ten-millimeter post spaces were prepared in 60 endodontically treated bovine incisors. Root perforations were created in half of the root canals in the cervical area prior to being filled with white MTA-Angelus. Fiber posts were luted into the root canals with two self-adhesive (RelyX Unicem or Set) or self-etching (Panavia F) resin cements. The posts were submitted to a pull-out test, and the data were submitted to two-way ANOVA and Tukey's post hoc tests (α = 0.05). The fiber posts exhibited reduced retention in MTA-repaired root canal perforations, regardless of the type of resin cement that was used (p < 0.001). Self-adhesive resin cements provided higher bond strength values than Panavia F, while no difference was observed between RelyX Unicem and Set (p > 0.05). The presence of MTA in repaired root perforations negatively affected post retention. In addition, self-adhesive cements seemed to be the best option to lute fiber posts within a root canal in these cases.