机械和热循环对新型自固化块体填充复合材料粘附性的影响

摘要(中文译文)

本研究旨在评估一种新型自固化大块填充修复系统在机械循环和热循环后与传统及光固化大块填充树脂复合材料相比的粘接性能。选取60颗磨牙制备I类洞，并按照各组修复系统进行修复。储存24小时后，将30个试件切片以获得矩形条状试件（0.9±0.1 mm），进行微拉伸粘接强度测试。剩余试件进行机械循环，随后对梁状试件进行热循环并测试。每组取三个梁状试件进行纳米渗漏测试以获得代表性图像。采用双因素方差分析和Tukey事后检验，显著性水平为5%。24小时后各组间粘接强度未见差异（p>0.05）。尽管所有修复系统均表现出粘接力下降，但自固化大块填充树脂复合材料在循环后与其他树脂复合材料相比显示出更高的数值（p<0.05）。纳米渗漏图像显示自固化大块填充复合材料与牙本质之间形成连续的粘接界面，且该界面在循环后得以维持。新型自固化大块填充树脂复合材料初期表现出与其他修复系统相似的粘接性能；然而，其在机械老化和热老化后表现出更优异的粘接力。

Abstract

This study aimed to evaluate the adhesive performance of a new self-cure bulk-fill restorative system compared with conventional and light-cured bulk-fill resin composites after mechanical and thermal cycling. Sixty molars were prepared for Class I cavities and restored according to the restorative systems from each group. After 24 h of storage, 30 specimens were sectioned to obtain rectangular sticks (0.9 ± 0.1 mm), which were submitted to microtensile bond strength testing. The remaining specimens were submitted to mechanical cycling; subsequently, beams were thermocycled and tested. Three beams from each group were subjected to nanoleakage testing to obtain illustrative images. Two-way ANOVA and Tukey's post hoc tests were performed, with a significance level of 5%. No difference on bond strength was observed among groups after 24 h (p > 0.05). Although all restorative systems showed adhesion reduction, self-cure bulk-fill resin composite showed higher values compared to other resin composites after cycling (p < 0.05). Nanoleakage images revealed a continuous adhesive interface between the self-cure bulk-fill composite and dentin, which was maintained after cycling. New self-cure bulk-fill resin composite showed initially similar adhesive performance to other restorative systems; however, it demonstrated superior adhesion after mechanical and thermal aging.

如何引用

Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] 的其他文献

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