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灌溶液是否会影响热处理的NiTi仪器的循环疲劳阻力? 一个体外试验研究研究
Christoph Matthias Schoppmeier1, Malin Janson2, Li Sun3
1Polyclinic for Operative Dentistry and Periodontology, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Str. 32, 50931, Cologne, Germany. christoph.schoppmeier@uk-koeln.de.
The Saudi dental journal
|January 22, 2026
概括
加热灌溶液,如EDTA和甲加EDTA显著降低了热处理的- (NiTi) 内文件的循环疲劳阻力 (CFR). 精心选择和控制灌剂的温度对于保持仪器性能至关重要.
科学领域:
- 牙周内科医院 牙周内科医院 牙周内科医院
- 材料科学 材料科学 材料科学
- 生物医学工程 生物医学工程
背景情况:
- 通过热预处理增强的- (NiTi) 仪器在根运河制备中提供了提高的精度,灵活性和循环疲劳抵抗 (CFR).
- 灌溶液对于清除污染至关重要,但可能会改变热处理的NiTi文件的特性.
研究的目的:
- 为了研究各种灌溶液和温度对热处理的NiTi内牙文件的CFR的影响.
- 为了确定化学和热暴露是否会损害NiTi仪器的机械完整性.
主要方法:
- 测试了四种类型的热处理互换NiTi文件.
- 在37°C和60°C的温度下,将文件浸入化 (NaOCl),乙烯基二胺三酸 (EDTA),乙醇,NaOCl+EDTA或蒸水中5分钟.
- 在模拟的根管中测量周期性疲劳抵抗,并使用扫描电子显微镜进行碎片分析.
主要成果:
- 文件系统,灌剂类型和温度显著影响了CFR (p < 0.001).
- EDTA,特别是当加热或与NaOCl结合时,显著降低了CFR.
- 鱼Q在37°C的蒸水中显示出最高的CFR,而EdgeOne R-Utopia在60°C的NaOCl+EDTA中显示出最低的CFR.
- 显微镜检测显示了表面降解,微孔和粗的表面,特别是加热EDTA和NaOCl+EDTA.
结论:
- 灌溶液的化学和热特性显著影响热处理的NiTi仪器的机械和金行为.
- 发现加热EDTA和NaOCl+EDTA对NiTi文件的CFR有害.
- 建议对灌剂进行谨慎的选择和温度管理,以保持仪器性能,并尽量减少内牙科手术期间骨架骨折的风险.
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