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- Title
Effect of root perforation repair with mineral aggregate-based cements on the retention of customized fiberglass posts.
- Authors
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
- 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.
- Subjects
GLASS fibers; CEMENT; CALCIUM aluminate; SCANNING electron microscopes; MINERALS
- Publication
Odontology, 2022, Vol 110, Issue 3, p535
- ISSN
1618-1247
- Publication type
Article
- DOI
10.1007/s10266-022-00686-9