这项研究评估了非质子溶剂的影响,即,四氢呋喃,吡啶,还有吗啉,与过氧化氢相比,在具有基于微拉伸粘结强度的复合芯的纤维增强复合柱的表面上。总的来说,150个FRCPostecPlus职位和150个D.T.轻型职位随机分为三组(非热循环,5000周期,和10,000个循环的热循环组)。每组根据表面后处理分为五个亚组:C,非治疗组;H2O2,浸入35%过氧化氢;THF,浸入四氢呋喃;PY,浸入吡啶中;和MP,浸入吗啉。将处理过的样品放置在塑料盖的底部,并用复合芯材料填充以准备微拉伸粘结测试。使用单向ANOVA和Tukey检验(p<0.05)以及独立t检验(p<0.05)评估数据。对于表面粗糙度,白光干涉法用于测量,通过单因素方差分析和Tukey检验分析平均表面粗糙度(p<0.05)。结果表明,在非热循环条件下,具有D.T.Light-Post的PY亚组具有最高的微拉伸粘结强度,其次是THF,MP,H2O2和对照组。对于FRCPostecPlus,PY组具有最高的微拉伸粘结强度,其次是MP,THF,H2O2和对照组。尽管热循环条件降低了所有组的微拉伸粘结强度,PY亚组的值仍然最高。独立的t检验表明,即使在所有非热循环和5000和10,000循环的热循环条件下,PY亚组中的D.T.Light-Post显示出比PY亚组中的FRCPostecPlus明显更高的微拉伸粘结强度。虽然纤维增强复合材料柱的表面粗糙度表明,用吡啶处理的柱具有每种材料类型的最高表面粗糙度,总之,作为非质子溶剂,吡啶在复合材料芯和纤维增强复合材料柱的界面之间产生最高的微拉伸粘结强度。
This investigation evaluated the effects of aprotic solvents, i.e., tetrahydrofuran, pyridine, and morpholine, compared with hydrogen peroxide, on the surfaces of fiber-reinforced composite posts with a composite core based on the microtensile bond strength. In total, 150 FRC Postec Plus posts and 150 D.T. Light-Posts were randomly divided into three groups (non-thermocycling, 5000-cycle, and 10,000-cycle thermocycling groups). Each group was divided into five subgroups according to the post-surface treatment: C, non-treatment group; H2O2, immersed in 35% hydrogen peroxide; THF, immersed in tetrahydrofuran; PY, immersed in pyridine; and MP, immersed in morpholine. The treated specimens were placed in the bottom of a plastic cap and filled with a composite core material in preparation for the microtensile bond test. The data were evaluated using one-way ANOVA and Tukey\'s test (p < 0.05) as well as an independent t-test (p < 0.05). For the surface roughness, white light interferometry was used for measurement, and the mean surface roughness was analyzed via one-way ANOVA and Tukey\'s test (p < 0.05). The results showed that, under non-thermocycling conditions, the PY subgroup with D.T. Light-Post had the highest microtensile bond strength, followed by THF, MP, H2O2, and the control groups. For FRC Postec Plus, the PY group had the highest microtensile bond strength, followed by MP, THF, H2O2, and the control groups. Although the thermocycling conditions decreased the microtensile bond strength in all groups, the PY subgroup still had the highest value. An independent t-test revealed that even under all non-thermocycling and 5000- and 10,000-cycle thermocycling conditions, D.T. Light-Post in the PY subgroup displayed significantly higher microtensile bond strengths than FRC Postec Plus in the PY subgroup. While the surface roughness of the fiber-reinforced composite posts showed that the posts treated with pyridine possessed the highest surface roughness for each material type, In conclusion, as an aprotic solvent, pyridine generates the highest microtensile bond strength between the interfaces of composite cores and fiber-reinforced composite posts.