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Regional ultimate tensile strength and water sorption/solubility of bulk-fill and conventional resin composites: The effect of long-term water storage
G. Rummani, K. Ide, K. Hosaka, A. Tichy, A. Abdou, M. Otsuki, M. Nakajima
Language English Country Japan
Document type Journal Article
NLK
Free Medical Journals
from 1982
J-STAGE (Japan Science & Technology Information Aggregator, Electronic) - English
from 1982
J-STAGE (Japan Science & Technology Information Aggregator, Electronic) Freely Available Titles - English
from 1982
Open Access Digital Library
from 1982-01-01
PubMed
34305051
DOI
10.4012/dmj.2021-101
Knihovny.cz E-resources
- MeSH
- Tensile Strength MeSH
- Polymerization MeSH
- Solubility MeSH
- Composite Resins * MeSH
- Materials Testing MeSH
- Water * MeSH
- Publication type
- Journal Article MeSH
The effect of long-term water storage on the regional ultimate tensile strength (UTS), water sorption (Wsp) and water solubility (Wsl) of conventional and bulk-fill resin composites at various depths was investigated. Composite specimens light-cured from one side were sectioned into beams corresponding to different depths (1-5 mm) and stored in water for 24 h, 1 week, 1 month, 6 months or 1 year. UTS increased during the first week and then gradually decreased over time, especially in deeper regions. Bulk-fill composites initially exhibited similar UTS at all depths, whereas the UTS of conventional composites at 1 mm and 5 mm differed significantly at all time points. Wsp and Wsl increased with depth and storage time, markedly at 3-5 mm after 1 month for conventional composites and after 6 months for bulk-fill composites. The signs of degradation at depths beyond 3 mm suggested that even bulk-fill composites have suboptimal properties in layers more than 3 mm in thickness.
References provided by Crossref.org
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- $a The effect of long-term water storage on the regional ultimate tensile strength (UTS), water sorption (Wsp) and water solubility (Wsl) of conventional and bulk-fill resin composites at various depths was investigated. Composite specimens light-cured from one side were sectioned into beams corresponding to different depths (1-5 mm) and stored in water for 24 h, 1 week, 1 month, 6 months or 1 year. UTS increased during the first week and then gradually decreased over time, especially in deeper regions. Bulk-fill composites initially exhibited similar UTS at all depths, whereas the UTS of conventional composites at 1 mm and 5 mm differed significantly at all time points. Wsp and Wsl increased with depth and storage time, markedly at 3-5 mm after 1 month for conventional composites and after 6 months for bulk-fill composites. The signs of degradation at depths beyond 3 mm suggested that even bulk-fill composites have suboptimal properties in layers more than 3 mm in thickness.
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