| Autor: |
de Souza, Gabriel Hernandez Machado, Pandolfo, Mariana Travi, Bortoluzzi, Eduardo Antunes, da Silveira Teixeira, Cleonice, Rossetto, Hebert Luís, da Rosa, Amanda Freitas, Machado, Renata Gondo, da Fonseca Roberti Garcia, Lucas |
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| Zdroj: |
Odontology; Jul2022, Vol. 110 Issue 3, p535-544, 10p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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