2026-03-06T14:34:35Z https://mdu.repo.nii.ac.jp/oai

oai:mdu.repo.nii.ac.jp:00002845 2023-06-19T07:54:37Z 178:488 193:201:486

Influence of solvent evaporation on ultimate tensile strength of contemporary dental adhesives 亀山, 敦史 Kameyama, Atsushi Haruyama, Akiko Abo, Hirokazu Kojima, Masashi Nakazawa, Yuichi Marumatsu, Takashi © The Author(s) 2019 Dental adhesive Solvent evaporation Ultimate tensile strength Water sorption HEMA application/pdf The aim of this study was to evaluate the influence of solvent evaporation on the ultimate tensile strength (UTS) of commercial adhesives. Two 1-step(OptiBond All-In-One and G-Premio Bond) and two 2-step (Clearfil SE Protect, OptiBond XTR) adhesives were selected. Two bottles of eachadhesive were opened and stored at 37 °C in a dry oven with silica gelshielded from light for 2 weeks (“Desiccated”). Two unopened bottles were stored at room temperature (“Original”). After 2 weeks, the adhesives were used to fill an hour-glass shaped, metallic matrix mold and light-cured. Samples were weighed, and then immersed in a 37 °C water bath for 1 h or 7 days. The UTS of each sample was then measured at a cross-head speed of 1 mm/min (n = 10). The UTS for the Clearfil SE Protect was higher in the“Original” than “Desiccated” samples (p < 0.05). For the OptiBond XTR, no significant difference was found between the ‘Original’ and ‘Desiccated’ samples (p > 0.05). Neither of the two “Original” 1-step samples could be hardened, even after light-curing, yet the ‘Desiccated’ OptiBond All-In-One samples obtained high UTS values. Both OptiBond All-In-One and Clearfil SE Protect had an increase in weight after the 7-day immersion in water. In conclusion, residual solvent reduces the mechanical strength of the adhesive. The hydrophilicity of the adhesive resin might also affect its mechanical strength. Springer 2019-07-29 eng journal article VoR https://mdu.repo.nii.ac.jp/records/2845 https://doi.org/10.1186/s40563-019-0120-0 info.doi/10.1186/s40563-019-0120-0 https://doi.org/10.1186/s40563-019-0120-0 https://doi.org/10.1186/s40563-019-0120-0 2196-4351 Applied Adhesion Science 7 4 https://mdu.repo.nii.ac.jp/record/2845/files/2019-JA-005.pdf application/pdf 1.0 MB 2019-07-25