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Is the double-sided microtensile bond strength test appropriate to assess the performance of adhesives to dentin?
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| Title: | Is the double-sided microtensile bond strength test appropriate to assess the performance of adhesives to dentin? |
| Other Titles: | 両側微小引張試験は象牙質歯質接着性を評価する際に妥当か? |
| Authors: | Ahmed, Zubaer Browse this author |
| Keywords: | Dentin | | dentin bonding | | self-etch adhesive systems | | microtensile bond strength | | double-sided microtensile bond strength test |
| Issue Date: | 25-Mar-2019 |
| Publisher: | Hokkaido University |
| Abstract: | [Objectives] To assess the bond strength of self-etch adhesives to dentin and to verify the appropriateness of double-sided compared to the conventional microtensile bond strength test in dentin. [Material and Methods] Sixty non-carious human molars and four current self-etch adhesives were used: ClearfilTM SE Bond2 (SE), ClearfilTM Universal Bond (CU), ScotchbondTM Universal (SB) and G-Premio Bond (GP). The adhesives were applied to 600 SiC paper-flat dentin surfaces according to manufacturer’s instructions. In EXP-1: Teeth were sectioned in the middle portion of dentin and bonded with self-etch adhesives: SE, CU, SB and GP for conventional μTBS test. In EXP-2: Teeth were sectioned and different dentin discs thicknesses (0.5, 1.0, 1.5, 2.0 mm) were obtained and bonded with SE and CU for the doublesided μTBS test. Both adhesives were tested simultaneously in the same beam. In EXP-3: 1-mm dentin discs were used for double-sided μTBS test and bonded with CU, SB and GP (six combinations) either on coronal or pulpal side of dentin disc. Samples were stored in distilled water (24 h, 37℃), sectioned into 1×1 mm beam, and μTBS test was performed. Failure mode was observed using stereoscope and SEM. Data were statistically analyzed by ANOVA and post hoc tests (p<0.05). [Results] EXP-1: Differences were found on μTBS conventional test for all adhesives. EXP-2: Dentin thickness of 1 mm showed to be the most appropriate substrate for the double-sided μTBS test of tested adhesives to dentin. EXP-3: Differences on bond strength were found for adhesive’s combinations. SB-CU combinations showed the highest and no significant different μTBS values (43.86 and 41.20 MPa). [Conclusions] Within the limitations of this study, double-sided μTBS test is not always applicable to assess the performance of adhesives to dentin. It will applicable when if two different adhesives shown almost similar bond strength values on conventional μTBS test. |
| Conffering University: | 北海道大学 |
| Degree Report Number: | 甲第13483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 八若 保孝 |
| Degree Affiliation: | 歯学研究科(口腔医学専攻) |
| Type: | theses (doctoral) |
| URI: | http://hdl.handle.net/2115/91597 |
| 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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