Does gradual dehydration affect the mechanical properties and bonding outcome of adhesives to dentin?

• Material Type: 博士論文
• Title: Does gradual dehydration affect the mechanical properties and bonding outcome of adhesives to dentin?
• Author/Editor: CHOWDHURY, ABU FAEM MOHAMMAD ALMAS
• Author Heading: CHOWDHURY, ABU FAEM MOHAMMAD ALMAS
• Publication, Distribution, etc.: Hokkaido University
• Publication Date: 2018-03-22
• Publication Date (W3CDTF): 2018-03-22
• Alternative Title: 乾燥処理時間は象牙質の物性と接着性能に影響を与えるか？
• Degree grantor/type: 北海道大学
• Date Granted: 2018-03-22
• Date Granted (W3CDTF): 2018-03-22
• Dissertation Number: 甲第13049号
• Degree Type: 博士(歯学)
• Text Language Code: eng
• Subject Heading: Dehydration; Two-step self-etch adhesive; Microtensile bond strength; Hardness; Elastic modulus; Weight loss; Cohesive failure
• NDC: 497
• Target Audience: 一般
• Note (General): Objectives To evaluate the effects of dehydration on the Hardness (H) and Elastic Modulus (E) of adhesives and dentin, and on the Microtensile Bond Strength (μTBS) of adhesives to dentin. Methods Flat, mid-coronal dentin surfaces of twenty human third molars were exposed and polished with 600-grit SiC paper. They were then randomly treated with Clearfil Mega Bond (MB) or Clearfil SE Bond 2 (SE2) and built-up with composite resin. After water-storage (37° C; 24 h), μTBS of wet (SE2W and MBW; tested at 5 min after removal from the storage) and dry (SE2D and MBD; tested at 10 min) specimens were obtained by subjecting resin/dentin beams (1 mm2) to a universal tester at a crosshead speed of 1 mm/min. Fracture modes were determined by scanning electron microscope. The changes in the H, E and weight of dehydrating dentin-only beams and adhesive discs were monitored over time. The μTBS data were analyzed by two-way ANOVA and Tukey’s test. The H, E and weight-loss data were analyzed by one-way repeated measures ANOVA and Bonferroni’s test (α = 0.05). Results Significant differences in bond strength were observed for adhesives (p < 0.05) and for conditions (dry vs. wet, p < 0.001). Dehydration caused significant gradual changes (p < 0.05) in the H, E and weight-loss of adhesives and dentin. However, the changes in dentin’s E were not significant (p > 0.05). Significance Gradual dehydration of μTBS testing specimens can cause significant changes in the test outcomes and should be avoided as a significant source of test variation.; (主査) 教授 佐野 英彦, 教授 吉田 靖弘, 教授 井上 哲; 歯学研究科（口腔医学専攻）
• DOI: 10.14943/doctoral.k13049; https://doi.org/10.14943/doctoral.k13049
• Persistent ID (NDL): info:ndljp/pid/12886230; https://dl.ndl.go.jp/pid/12886230
• Collection: 障害者向け資料
• Collection (Materials For Handicapped People:1): テキストデータ
• Collection (particular): 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文; https://dl.ndl.go.jp/collections/A00014
• Acquisition Basis: 博士論文（自動収集）
• Date Accepted (W3CDTF): 2023-06-02T22:06:10+09:00
• Format (IMT): application/pdf
• Access Restrictions: 国立国会図書館内限定公開
• Service for the Digitized Contents Transmission Service: 図書館・個人送信対象外
• Availability of remote photoduplication service: 可
• Periodical Title (URI): http://dx.doi.org/10.14943/doctoral.k13049; http://hdl.handle.net/2115/89185
• Data Provider (Database): 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp