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Fracture resistance of endodontically treated teeth with cervical defects using different restorative treatments

BACKGROUND/PURPOSE: The restoration of endodontically treated teeth (ETT) with cervical defects has been a challenge for dentists. The purpose of this study was to evaluate the effect of restorative treatment on the fracture resistance of ETT with cervical defects. MATERIALS AND METHODS: One hundred...

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Autores principales: Guo, Yi-Bai, Bai, Wei, Liang, Yu-Hong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Association for Dental Sciences of the Republic of China 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9201527/
https://www.ncbi.nlm.nih.gov/pubmed/35756765
http://dx.doi.org/10.1016/j.jds.2021.09.017
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author Guo, Yi-Bai
Bai, Wei
Liang, Yu-Hong
author_facet Guo, Yi-Bai
Bai, Wei
Liang, Yu-Hong
author_sort Guo, Yi-Bai
collection PubMed
description BACKGROUND/PURPOSE: The restoration of endodontically treated teeth (ETT) with cervical defects has been a challenge for dentists. The purpose of this study was to evaluate the effect of restorative treatment on the fracture resistance of ETT with cervical defects. MATERIALS AND METHODS: One hundred and twenty freshly extracted human intact straight-single-root maxillary premolars were randomly divided into 6 groups. Group 1 remained untreated. Cervical defects of 4 mm-depth and 3 mm-height were created in groups 2–6. Group 3–6: root canal treatment. Group 4: direct composite resin restoration. Group 5: 2-mm full-cusp-coverage composite resin restoration. Group 6: fiber-post-supported composite resin restoration. A static fracture test was used to determine the fracture resistance of teeth under axial (n = 10) and palatal (30°) (n = 10) loading. Fracture modes were categorized as restorable and unrestorable. RESULTS: Compared with intact teeth, the axial fracture resistance of teeth with cervical defects decreased by approximately 39%, and endodontic procedures resulted in 10% more reduction. When ETT with cervical defects were restored using direct composite resin filling, the axial fracture resistance recovered to 72% of that of intact teeth, but no significant change occurred under oblique loading. After full-cusp-coverage or fiber-post-supported restoration, fracture resistance showed complete recovery to the value of intact teeth (P > 0.05). Sixty percent of fractures were unrestorable for fiber-post-supported teeth, while in the full-cusp-coverage restoration group, 80–90% of fractures were restorable. CONCLUSION: Full-cusp-coverage restoration or fiber-post-supported restoration could improve the fracture resistance of ETT with cervical defects, whereas unrestorable fractures easily occurred in fiber-post-supported restorations.
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spelling pubmed-92015272022-06-24 Fracture resistance of endodontically treated teeth with cervical defects using different restorative treatments Guo, Yi-Bai Bai, Wei Liang, Yu-Hong J Dent Sci Original Article BACKGROUND/PURPOSE: The restoration of endodontically treated teeth (ETT) with cervical defects has been a challenge for dentists. The purpose of this study was to evaluate the effect of restorative treatment on the fracture resistance of ETT with cervical defects. MATERIALS AND METHODS: One hundred and twenty freshly extracted human intact straight-single-root maxillary premolars were randomly divided into 6 groups. Group 1 remained untreated. Cervical defects of 4 mm-depth and 3 mm-height were created in groups 2–6. Group 3–6: root canal treatment. Group 4: direct composite resin restoration. Group 5: 2-mm full-cusp-coverage composite resin restoration. Group 6: fiber-post-supported composite resin restoration. A static fracture test was used to determine the fracture resistance of teeth under axial (n = 10) and palatal (30°) (n = 10) loading. Fracture modes were categorized as restorable and unrestorable. RESULTS: Compared with intact teeth, the axial fracture resistance of teeth with cervical defects decreased by approximately 39%, and endodontic procedures resulted in 10% more reduction. When ETT with cervical defects were restored using direct composite resin filling, the axial fracture resistance recovered to 72% of that of intact teeth, but no significant change occurred under oblique loading. After full-cusp-coverage or fiber-post-supported restoration, fracture resistance showed complete recovery to the value of intact teeth (P > 0.05). Sixty percent of fractures were unrestorable for fiber-post-supported teeth, while in the full-cusp-coverage restoration group, 80–90% of fractures were restorable. CONCLUSION: Full-cusp-coverage restoration or fiber-post-supported restoration could improve the fracture resistance of ETT with cervical defects, whereas unrestorable fractures easily occurred in fiber-post-supported restorations. Association for Dental Sciences of the Republic of China 2022-04 2021-10-08 /pmc/articles/PMC9201527/ /pubmed/35756765 http://dx.doi.org/10.1016/j.jds.2021.09.017 Text en © 2021 Association for Dental Sciences of the Republic of China. Publishing services by Elsevier B.V. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Original Article
Guo, Yi-Bai
Bai, Wei
Liang, Yu-Hong
Fracture resistance of endodontically treated teeth with cervical defects using different restorative treatments
title Fracture resistance of endodontically treated teeth with cervical defects using different restorative treatments
title_full Fracture resistance of endodontically treated teeth with cervical defects using different restorative treatments
title_fullStr Fracture resistance of endodontically treated teeth with cervical defects using different restorative treatments
title_full_unstemmed Fracture resistance of endodontically treated teeth with cervical defects using different restorative treatments
title_short Fracture resistance of endodontically treated teeth with cervical defects using different restorative treatments
title_sort fracture resistance of endodontically treated teeth with cervical defects using different restorative treatments
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9201527/
https://www.ncbi.nlm.nih.gov/pubmed/35756765
http://dx.doi.org/10.1016/j.jds.2021.09.017
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