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Fracture Strength and Failure Modes of Endodontically Treated Premolars Restored with Compact and Hollow Composite Posts Subjected to Cyclic Fatigue
- Source :
- Materials (Basel) 15 (2022). doi:10.3390/ma15031141, info:cnr-pdr/source/autori:Gallicchio V.; Lodato V.; De Santis R.; Rengo S./titolo:Fracture Strength and Failure Modes of Endodontically Treated Premolars Restored with Compact and Hollow Composite Posts Subjected to Cyclic Fatigue/doi:10.3390%2Fma15031141/rivista:Materials (Basel)/anno:2022/pagina_da:/pagina_a:/intervallo_pagine:/volume:15, Materials, Vol 15, Iss 1141, p 1141 (2022), Materials; Volume 15; Issue 3; Pages: 1141
- Publication Year :
- 2022
- Publisher :
- Molecular Diversity Preservation International, Basel, 2022.
-
Abstract
- Physical and mechanical properties of continuous carbon or glass fiber reinforced endodontic posts are relevant to increase the retention and resistance of the tooth-restoration system. Hollow posts have been recently designed for delivering the luting cement through the post hole, thus enhancing the post-dentin interface by reducing the risk of air bubbles formation. Methods: Three type of endodontic posts, a carbon fiber hollow post, a glass fiber hollow post and a compact glass fiber post were investigated. Mechanical properties of these posts were assessed through bending tests. Teeth were subjected to fatigue cycling and the strength of restored teeth was detected through static tests. Failure modes were investigated through optical and scanning electron microscopy. Results show that composite posts increase the mechanical stability by more than 100% compared to premolars restored with particulate composite. Carbon fiber posts retain the highest strength (1467 N ± 304 N) among the investigated post and core restoration, but an unfavorable type of fracture has been observed, preventing the tooth re-treatment. Instead, more compliant posts (i.e., glass fiber reinforced composite, providing a strength of 1336 N ± 221 N), show a favorable mode of fracture that allows the re-treatment of teeth in the case that failure occurs. Glass fiber hollow posts show a good trade-off between strength and a favorable type of fracture.
- Subjects :
- Technology
Microscopy
QC120-168.85
Bending
Fracture strength
QH201-278.5
Particulate composite
Engineering (General). Civil engineering (General)
TK1-9971
Endodontic post
Descriptive and experimental mechanics
fiber reinforced composite
particulate composite
endodontic post
fatigue
bending
fracture strength
General Materials Science
Electrical engineering. Electronics. Nuclear engineering
TA1-2040
Fiber reinforced composite
Fatigue
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Materials (Basel) 15 (2022). doi:10.3390/ma15031141, info:cnr-pdr/source/autori:Gallicchio V.; Lodato V.; De Santis R.; Rengo S./titolo:Fracture Strength and Failure Modes of Endodontically Treated Premolars Restored with Compact and Hollow Composite Posts Subjected to Cyclic Fatigue/doi:10.3390%2Fma15031141/rivista:Materials (Basel)/anno:2022/pagina_da:/pagina_a:/intervallo_pagine:/volume:15, Materials, Vol 15, Iss 1141, p 1141 (2022), Materials; Volume 15; Issue 3; Pages: 1141
- Accession number :
- edsair.doi.dedup.....355a36fc96c876e29f4b0a123a05ffb4