Erschienen in:
19.01.2022 | Original Article
Effect of root perforation repair with mineral aggregate-based cements on the retention of customized fiberglass posts
verfasst von:
Gabriel Hernandez Machado de Souza, Mariana Travi Pandolfo, Eduardo Antunes Bortoluzzi, Cleonice da Silveira Teixeira, Hebert Luís Rossetto, Amanda Freitas da Rosa, Renata Gondo Machado, Lucas da Fonseca Roberti Garcia
Erschienen in:
Odontology
|
Ausgabe 3/2022
Einloggen, um Zugang zu erhalten
Abstract
The purpose of this study was to investigate whether the root perforation repair with mineral aggregate-based cements affects the retention of customized fiberglass posts to bovine intraradicular dentin. Sixty-four bovine mandibular incisors had their root canals endodontically treated and prepared for fiberglass posts luting. Teeth were randomly distributed into four groups (n = 16), according to the cement used for the perforations repair (MTA HP; calcium aluminate cement—CAC; and CAC + calcium carbonate nanoparticles—nano-CaCO3) and control group (no perforation). The groups were redistributed according to the fiberglass posts luting protocol (n = 8): total-etching (TE) (MTA HP/TE; CAC/TE; CAC + CaCO3/TE and control/TE) and self-etching (SE) (MTA HP/SE; CAC/SE; CAC + CaCO3/SE and control/SE). Roots were sectioned into 1.3 mm—thick dentin slices obtaining samples that were submitted to the push-out test in Universal Testing Machine (Instron, Model 4444-0.5 mm/min). The fractured samples were analyzed under stereomicroscope and Scanning Electron Microscope (SEM). CAC/TE and CAC/SE groups had significant difference between the cervical and middle thirds (p < 0.05). When the root thirds were not considered, CAC/SE had the lowest bond strength and differed statistically from CAC/TE and CAC + CaCO3/TE groups, which had the highest mean bond strength values (p < 0.05). The root perforations repair did not affect the bond strength of resin cement/customized fiberglass posts to bovine dentin. The increase in bond strength is luting protocol dependent.