连续使用 - 灭菌周期对ProTaper终极文件的机械和热影响:一个具有实际影响的体外评估
Helena Khidr1, Amre R Atmeh2, Mohamed Jamal1
1Endodontic Department, Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai Health, Dubai, United Arab Emirates.
Journal of endodontics
|January 22, 2026
概括
重复使用和自灭菌显著降低了热处理- (NiTi) 旋转文件的循环疲劳阻力. 这种不良影响随着使用周期的增加而增加,从而影响曲线根通道中的文件耐用性.
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
背景情况:
- 循环疲劳失败是曲根管中旋转内牙科文件的主要关注点.
- 热处理的- (NiTi) 文件提供了更好的灵活性和对循环疲劳的抵抗力.
研究的目的:
- 为了评估重复使用和自闭体灭菌对ProTaper Ultimate (PT-U) NiTi文件的动态循环疲劳阻力的影响.
- 为了评估这些文件在J形运河中模拟使用后的耐用性.
主要方法:
- 180个新的ProTaper Ultimate (PT-U) NiTi文件 (Slider,Shaper,F1,F2) 被分为新,两用和四用组.
- 文件被用来准备模拟的J形道,并在使用之间通过自闭槽进行消毒.
- 进行了动态循环疲劳测试,以确定平均周期到故障 (NCF).
主要成果:
- 在所有组中,Slider文件的NCF明显高于Shaper,F1和F2文件.
- 重复使用和灭菌周期逐渐降低了所有测试的PT-U文件的循环疲劳抵抗力.
- 在使用和绝育四个周期后,观察到NCF显著减少.
结论:
- 重复的临床使用和自闭体灭菌显著损害了新型热处理NiTi文件的循环疲劳抵抗力.
- 使用/消毒周期增加和文件性能降低 (NCF) 之间存在直接相关性.
- 临床医生应考虑重新消毒的内牙科文件的疲劳抵抗力降低.
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