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牙应力变化的有限元评估,在不同的内牙外科手术方法后进行

Tuğrul Aslan¹, Emir Esim², Yakup Üstün³

¹Department of Endodontics, Faculty of Dentistry, Erciyes University, Turhan Baytop Street, No. 1, Yenidoğan District, Talas, Kayseri, 38280, Turkey. dr.tugrulaslan@hotmail.com.

|January 6, 2024

概括

半切割导致下牙的最大压力,其次是根截肢和切除. 生物和矿物三氧化物聚合物在顶端切除中表现出类似的压力分布,生物有可能减少根截肢中的压力.

科学领域:

牙科的生物材料
生物机械工程生物机械工程
牙内膜外科手术牙内膜外科手术

背景情况:

内牙科手术治疗的目的是保护天然牙,但可以改变它们的生物机械行为.
了解不同手术后牙中应力分布对于预测牙存活至关重要.
有限元分析 (FEA) 是模拟牙结构中的生物力学反应的宝贵工具.

研究的目的:

为了比较尖端切除,根截除和半切除对模拟下牙的牙应力分布的影响.
评估Biodentine和矿物三氧化物聚合物 (MTA) 作为特定内牙外科手术模型中的修复材料的影响.
使用FEA在模拟的闭合力下分析压力模式.

主要方法:

创建了一个第一个下牙的3D有限元素模型,包括声牙和外科缺陷模型.
模拟包括切除,根截肢和半截肢,使用Biodentine或MTA进行修复.
应用了斜面300N的力,并分析了牙中的最大·米塞斯应力.

主要成果:

半切割模型表现出最高的最大·米塞斯应力 (138.87 MPa).
根截肢模型显示,与半截肢相比,压力明显较低 (66.49-73.06 MPa).
角切除模型显示了最低的应力 (39.00-39.11 MPa),Biodentine和MTA之间没有显著差异.
在根截肢模型中的生物牙导致的压力低于MTA.

结论:

半切割对下牙施加最大的生物力学压力,其次是根截肢,然后是尖端切除.
对于顶端切除,Biodentine和MTA提供了可比的应力分布.
生物牙可能是与MTA相比有利的选择,用于减轻压力的根截肢手术.

关键词:

角切除术是指角切除术.生物牙是一种生物牙.半截切的部分.矿物三氧化物聚合物矿物三氧化物聚合物单一的锡尔科尼亚石英.切断根的截肢是根的截肢.

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