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使用新型测试设置比较NiTi内牙单档系统的循环疲劳阻力和自由恢复转换温度

Emad Youssef^1,2, Holger Jungbluth¹, Søren Jepsen¹

¹Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, 53111 Bonn, Germany.

Materials (Basel, Switzerland)

|April 9, 2024

概括

身体温度显著降低了内牙单档系统的循环疲劳抵抗力. 这一发现强调了在根管程序期间控制温度的重要性,以防止仪器故障.

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:

循环疲劳耐受性对于内牙长寿至关重要.
- (NiTi) 旋转和反转文件通常用于根管疗法.
了解影响文件性能的因素,如温度,对于临床成功至关重要.

研究的目的:

为了评估体温 (37°C) 对三种不同的内牙单档系统周期性疲劳耐力的影响.
为了比较One Shape®新一代,WaveOneTM和WaveOne®GOLD文件在体温和室温下的性能.
评估曲和自由回收 (BFR) 方法的适用性,以确定NiTi内牙仪器的转换温度.

主要方法:

三个单文件系统 (One Shape®新一代,WaveOneTM,WaveOne® GOLD) 进行了测试.
循环疲劳测试是在20°C和37°C的人造运河中进行的.
一个定制的设置与加热元件模拟体温.
使用曲和自由回收 (BFR) 方法确定了转变温度.

主要成果:

所有经过测试的内科牙科档案系统在37°C与20°C相比显著减少周期性疲劳寿命 (p < 0.05).
WaveOne® GOLD系统显示,在更紧的曲线 (p = 0.075) 中,在37°C时疲劳寿命减少的趋势较小 (p = 0.075).
所有测试的文件系统的转换温度都低于人体温度.

结论:

身体温度直接和负面地影响了评估的内牙单档系统的循环疲劳抵抗力.
临床程序应考虑体温对NiTi文件性能的影响,以尽量减少骨折风险.
BFR方法是一种可行的技术,用于确定内牙仪器的奥氏体表面温度 (Af).

关键词:

曲和自由回收可以使用.循环疲劳是指循环疲劳.互换的牙周内科仪器.

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