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Effects of remaining dentin thickness, smear layer and aging on the bond strengths of contemporary universal adhesives to dentin.

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Please use this identifier to cite or link to this item:https://doi.org/10.14943/doctoral.k14536
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Title: Effects of remaining dentin thickness, smear layer and aging on the bond strengths of contemporary universal adhesives to dentin.
Other Titles: 象牙質に対する従来型ユニバーサルアドヒーシブの残存象牙質の厚さ、スミヤー層、長期耐久性による接着強さの影響
Authors: Rime, Shamme Akter Browse this author
Issue Date: 25-Mar-2021
Abstract: To evaluate the effects of remaining dentin thickness (RDT) and different smear layers on the microtensile bond strength (μTBS) of universal adhesives to dentin after 24 hours and long-term water storage. Flat dentin surfaces of ninety-six extracted human third molars were exposed and randomly allocated to 12 groups (n = 8) based on adhesives: ClearfilTM SE Bond 2 (SE), ClearfilTM Universal Bond (CU) and ScotchBondTM Universal (SB); smear layers: prepared either with 600-grit SiC paper (P) or regular diamond bur (B); and waterstorage time: stored in distilled water at 37 oC for 24 hours (24h) or 1 year (1y). Resindentin beams were obtained and subjected to μTBS test. Three-way ANOVA was used to determine the effects of adhesives, smear layers, and aging. The correlation between μTBS and RDT was evaluated with Pearson’s correlation test (α = 0.05). Fractured surfaces were observed by SEM. μTBS was significantly affected by adhesives, smear layers, and aging (p ? 0.001). A statistically significant linear relationship was also observed between μTBS and RDT (p < 0.05) in all the tested groups, except for SEB1y and CUB24h (p > 0.05). The most frequent fracture mode was mixed failure, but the number of adhesive failures increased after 1y. Though material dependent, remaining dentin thickness, smear layers, and aging can influence the bonding performances of contemporary self-etch adhesives.
Conffering University: 北海道大学
Degree Report Number: 甲第14536号
Degree Level: 博士
Degree Discipline: 歯学
Examination Committee Members: (主査) 教授 佐野 英彦, 教授 吉田 靖弘, 教授 井上 哲
Degree Affiliation: 歯学研究科(口腔医学専攻)
Type: theses (doctoral)
URI: http://hdl.handle.net/2115/81260
Appears in Collections:課程博士 (Doctorate by way of Advanced Course) > 歯学院(Graduate School of Dental Medicine)
学位論文 (Theses) > 博士 (歯学)

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