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| 1 | Exploration and preliminary clinical investigation of an adhesive approach for primary tooth restoration显示文摘The current study aims to investigate a suitable adhesive for primary tooth enamel. Shear bond strength(SBS)of primary teeth and the length of resin protrusion were analyzed using one-way ANOVA with Bonferroni multiple comparison tests after etching with 35% H_(3)PO_(4). SBS and marginal microleakage tests were conducted with Single Bond Universal(SBU)/Single Bond 2(SB2) adhesives with or without pre-etching using a nonparametric Kruskal-Wallis test. Clinical investigations were performed to validate the adhesive for primary teeth restoration using Chi-square tests. Results showed that the SBS and length of resin protrusion increased significantly with the etching time. Teeth in the SBU with 35% H_(3)PO_(4)pre-etching groups had higher bond strength and lower marginal microleakage than those in the SB2 groups. Mixed fractures were more common in the 35% H_(3)PO_(4)etched 30 s + SB2/SBU groups. Clinical investigations showed significant differences between the two groups in cumulative retention rates at the 6-, 12-and 18-month follow-up evaluations, as well as in marginal adaptation, discoloration, and secondary caries at the 12-and 18-month follow-up assessments.Together, pre-etching primary teeth enamel for 30 s before SBU treatment improved clinical composite resin restoration, which can provide a suitable approach for restoration of primary teeth. | Xiangqin Xu Jiansheng Zhu May Lei Mei Huaying Wu Kaipeng Xie Shoulin Wang Yaming Chen | 2023 | The Journal of Biomedical Research2023，37，2： | 0 |
| 2 | 掺TiO2玻璃粉对玻璃离子水门汀性能的影响显示文摘采用不同TiO2掺杂量(0、0.5%、1%、3%和5%)制备的玻璃粉与聚丙烯酸制得玻璃离子水门汀(GIC),以及将含3%TiO2玻璃粉经不同温度(400℃、500℃、600℃和700℃)热处理后制得玻璃离子水门汀,测试GIC的固化时间和抗压强度。并使用DSC、XRD、SEM以及粒径分析仪,研究玻璃粉体热处理前后的结晶特性、玻璃转变和结构特征。结果表明,晶核剂TiO2的掺入使玻璃的结构致密性增强,不仅延长了玻璃离子水门汀的固化时间,而且明显提高GIC的抗压强度;热处理后的玻璃粉会发生团聚和结块现象,600℃以上时会有CaF2晶体析出。此外,玻璃粉经热处理后可以明显延长GIC的固化时间,然而过高温度的热处理改变玻璃颗粒表面形态,降低GIC的机械强度。 | 刘守信 黄从运 | 2019 | 硅酸盐通报2019，38，5： | 0 |
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