周围手术和上部中央切口的不同根堵塞协议:有限元素分析.
E Klein-Franke1, E Youssef2, L Keilig3
1Oral Technology, University of Bonn, Welschnonnenstr. 17, Bonn 53111, Germany.
概括
在上切口上进行的围切手术增加了牙和骨的压力,不成熟的根经历了最高的压力. 堵塞材料对完整牙的压力影响最小.
科学领域:
- 牙科生物力学 牙科生物力学
- 有限元素分析的研究.
- 在口腔外科手术中.
背景情况:
- 研究根管填充材料的生物力学影响和上部中部切口器上的apicoectomy.
- 评估不完整的根形成对负载下的牙稳定性的影响.
研究的目的:
- 为了确定各种堵塞材料与切除术结合对牙压力的影响.
- 在负荷条件下评估未成熟根的生物力学行为.
主要方法:
- 使用CBCT扫描数据创建上部中心切口的有限元模型.
- 模拟根管治疗,切除术和不成熟的根形成.
- 施加1N和100N的负荷来测量应力,延展,旋转和位移.
主要成果:
- 周围手术显著增加了牙和周围骨的压力.
- 堵塞材料在完整的牙的应力水平上只显示了微小的差异.
- 未成熟的根表现出最高的应力值,接近牙产力的一半.
结论:
- 间角和负载方向是围外科手术规划和有限元分析的关键因素.
- 不成熟的根形成带来了重大的生物力学挑战,压力度很高.
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