自闭体对各种旋转文件的表面拓形状的影响
R Arasappan1, N Sona Prabhakar2, Vertika Mishra3
1Department of Conservative Dentistry and Endodontics, Sri Ramachandra Institute of Higher Education and Research, Chennai, Tamil Nadu, India.
Journal of pharmacy & bioallied sciences
|February 10, 2025
概括
自封式旋转内牙文件改变了它们的表面完整性,特别是在- (NiTi) 文件中. 经过金处理的文件表现出更强的耐用性,可以抵御绝育引起的地形变化,从而保持性能.
科学领域:
- 牙科材料科学 牙科材料科学
- 牙周内科医院 牙周内科医院 牙周内科医院
- 生物材料工程 生物材料工程
背景情况:
- 旋转文件对于内牙科的根运河准备至关重要.
- 重复的灭菌,特别是自闭塞,可以降低文件表面的完整性.
- 这种退化可能会损害仪器的性能和寿命.
研究的目的:
- 为了评估表面地形变化在多个自闭柜灭菌循环后各种旋转内牙科文件.
- 为了比较- (NiTi),不钢和金处理的文件在自封化条件下的耐用性.
主要方法:
- 60个旋转档 (每 20 个 NiTi,不钢,金处理) 经过 10 次自闭柜循环 (121°C, 15 分钟).
- 扫描电子显微镜 (SEM) 用于在杀菌前后分析表面地形.
- 评估的参数包括表面粗度,微裂和碎片保留.
主要成果:
- 所有文件类型都显示了自封后的表面地形变化.
- 在40%的样品中,NiTi文件显示粗度增加了35%,微裂纹增加了40%.
- 黄金处理的文件显示的变化最少:15%的粗度增加,只有10%的样本出现微裂.
- 在消毒后,NiTi文件具有更高的碎片保留率.
结论:
- 自闭柜灭菌显著影响旋转文件表面的地形,NiTi文件是最容易受到影响的.
- 经过金处理的文件表现出对地形变化的优越抵抗力,这表明耐用性提高.
- 文件材料的选择对于维护内牙仪表的性能和寿命以及频繁的灭菌至关重要.
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