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根管填充去除剂在重复使用后的耐用性和有效性:一个体外研究

Gizem Fatma Özden¹, Levent Akıncı², Neslihan Şi̇mşek³

¹Department of Endodontics, Faculty of Dentistry, Inonu University, Malatya, Türkiye. gizem.bas@inonu.edu.tr.

BMC oral health

|December 30, 2025

概括

重复使用Micro-Mega Remover文件进行再处理,可显著降低循环疲劳抵抗力,增加到第三次使用时的骨折风险. 这些-旋转仪器的重复使用没有影响根管清洁.

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:

由于经济压力,尽管建议单次使用,但- (NiTi) 旋转仪器经常被重复使用.
这会影响仪器的性能,特别是循环疲劳抵抗力和根管清洁度.

研究的目的:

为了评估重复使用对Micro-Mega Remover文件的循环疲劳电阻的影响.
用Remover文件重新处理后,评估根管壁的清洁度.

主要方法:

40个新的Remover文件根据使用情况被分为四组:控制 (未使用),1次使用,2次使用和3次使用.
文件在模拟道中经过循环疲劳测试;骨折时间和骨折周期 (NCF) 被记录下来.
微计算机断层扫描 (μCT) 评估了运河壁上的残留填充材料;扫描电子显微镜 (SEM) 检查了断裂表面.

主要成果:

循环疲劳耐力 (骨折时间和NCF) 随着重复使用而显著下降,特别是在第一次到第二次使用时.
一次或两次使用的文件表现出与未使用的文件相似的耐疲劳性,但第三次使用显著降低了耐力.
与多次使用相比,单次使用后碎片的长度更短;μCT在残留填充材料中没有显著差异.

结论:

重复使用Micro-Mega Remover文件显著损害了循环疲劳耐力,在第三次使用时增加骨折风险.
虽然循环疲劳耐力在第一次使用后降低,但它仍然与未使用的文件相比,直到第三次使用.
根管清洁度,通过残留填充材料进行评估,并没有受到重复使用文件的显著影响.

关键词:

循环疲劳是一种循环疲劳.牙科仪器是指牙科仪器.微型计算机断层扫描 (Micro-Computed tomography) 是一种微型计算机断层扫描.-合金是合金中的一种.根管治疗. 根管治疗.

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