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ID 61275
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Irie, Masao Department of Biomaterials, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science Kaken ID publons researchmap
Maruo, Yukinori Department of Occlusion and Removable Prosthodontics, Okayama University ORCID Kaken ID publons researchmap
Nishigawa, Goro Department of Occlusion and Removable Prosthodontics, Okayama University
Yoshihara, Kumiko National Institute of Advanced Industrial Science and Technology (AIST), Health and Medical Research Institute
Matsumoto, Takuya Department of Biomaterials, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science Kaken ID researchmap
Abstract
The aims of this study were to investigate the effects of root dentin shear bond strength and pull-out force of resin core build-up materials on flexural strength immediately after setting, after one-day water storage, and after 20,000 thermocycles. Eight core build-up and three luting materials were investigated, using 10 specimens (n = 10) per subgroup. At three time periods-immediately after setting, after one-day water storage, and after 20,000 thermocycles, shear bond strengths to root dentin and pull-out forces were measured. Flexural strengths were measured using a 3-point bending test. For all core build-up and luting materials, the mean data of flexural strength, shear bond strength and pull-out force were the lowest immediately after setting. After one-day storage, almost all the materials yielded their highest results. A weak, but statistically significant, correlation was found between flexural strength and shear bond strength (r = 0.508, p = 0.0026, n = 33). As the pull-out force increased, the flexural strength of core build-up materials also increased (r = 0.398, p = 0.0218, n = 33). Multiple linear regression analyses were conducted using these three independent factors of flexural strength, pull-out force and root dentin shear bond strength, which showed this relationship: Flexural strength = 3.264 x Shear bond strength + 1.533 x Pull out force + 10.870, p = 0.002). For all the 11 core build-up and luting materials investigated immediately after setting, after one-day storage and after 20,000 thermocycles, their shear bond strengths to root dentin and pull-out forces were correlated to the flexural strength in core build-up materials. It was concluded that the flexural strength results of the core build-up material be used in research and quality control for the predictor of the shear bond strength to the root dentin and the retentive force of the post.
Keywords
flexural strength
resin core build-up materials
durability
pull-out force
bond strength
Published Date
2020-12-09
Publication Title
Polymers
Volume
volume12
Issue
issue12
Publisher
MDPI
Start Page
2947
ISSN
2073-4360
Content Type
Journal Article
language
英語
OAI-PMH Set
岡山大学
Copyright Holders
© 2020 by the authors.
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publisher
PubMed ID
DOI
Web of Science KeyUT
Related Url
isVersionOf https://doi.org/10.3390/polym12122947
License
http://creativecommons.org/licenses/by/4.0/
Funder Name
Japan Society for the Promotion of Science
助成番号
26462950