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在水中存储,化学老化或热循环的粘合剂粘合接口的边际微泄漏
Pedro Ivo da Graça Fagundes1, Ricardo Armini Caldas2, Rafael Leonardo Xediek Consani3
1Piracicaba Dental School, State University of Campinas, SP Brazil.
不同的粘合剂化处理显示出不同的边缘微漏. 在所有测试的粘合剂协议中,热循环显著增加了牙/树脂接口上的微漏,这表明粘合耐久性降低了.
科学领域:
- 牙科材料科学 牙科材料科学
- 生物材料工程 生物材料工程
- 粘合式牙科 粘合式牙科
背景情况:
- 牙/树脂接口的边缘微泄漏是影响牙科修复寿命的关键因素.
- 了解不同粘合剂在各种老化条件下的性能,对于临床成功至关重要.
研究的目的:
- 为了评估和比较牙/树脂接口的边际微泄漏,使用三个不同的粘合剂光协议.
- 评估储水,化学老化 (低化) 和热循环对微泄漏的影响.
主要方法:
- 一项使用牛牙块 (n=45) 的体外研究,经过三种光方案:两瓶自蚀刻粘合剂+双固化树脂水泥 (2BSE+DRC),自粘合剂原料+光激活双固化树脂水泥 (SAP+PRC) 和自粘合剂原料+自固化双固化树脂水泥+Oxyguard II (SAP+SRC+O).
- 样本通过储存水 (7天),10%的甲溶液 (1小时) 或热循环 (5,000个循环) 来老化.
- 边际微泄漏被量化使用甲蓝色染料透.
主要成果:
- 2BSE+DRC协议显示,储水后 (100μm) 的微泄漏率最低,但热循环后 (220μm) 的微泄漏率最高.
- SAP+PRC和SAP+SRC+O在储水和甲老化后表现出类似的微泄漏,与2BSE+DRC相比,SAP+SRC+O显示的值显著更高 (620μm,610μm).
- 在所有组中,热循环显著增加了微泄漏率,SAP+SRC+O (1,370μm) 显示最高,其次是SAP+PRC (810μm) 和2BSE+DRC (220μm).
结论:
- 在不同的老化条件下,粘合剂光处理对边际微泄漏具有不同的抗性.
- 热循环是最重要的挑战,导致所有测试的粘合剂协议中牙/树脂接口的边际微泄漏率最高.
- 选择粘合剂制系统及其与老化因素的相互作用极大地影响了粘合修复的边际完整性.
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