静态和垂直负载后不同长度和磨料材料的中央切割器内冠生物力学:有限元素研究
Waleed M S Alqahtani1, Salah A Yousief2,3, Raafat Tammam4
1Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Saudi Arabia.
International journal of dentistry
|April 8, 2024
概括
内冠高度显著影响根管治疗牙的压力分布,更高的冠状减少了周围组织的压力,但增加了根和水泥上的压力. 材料选择的影响最小.
科学领域:
- 牙科材料科学 牙科材料科学
- 生物材料工程 生物材料工程
- 恢复性牙科 恢复性牙科
背景情况:
- 经过内牙治疗的牙需要持久的修复.
- 内冠为恢复这些牙提供了一种保守的方法.
- CAD-CAM材料为内冠制造提供了多功能选择.
研究的目的:
- 为了比较内牙治疗的中央切口与不同高度的内冠恢复的压力分布和失败风险.
- 评估不同CAD-CAM材料 (IPS e.max CAD,卡塔纳,Zolid Fx) 对应力模式的影响.
- 评估内冠高度 (2,4和6毫米) 对机械行为的影响.
主要方法:
- 有限元分析 (FEA) 用于根管治疗的中央切口的数字化模型.
- 模型被修复,用不同的CAD-CAM材料制造的内冠.
- 模拟的轴向和斜负荷被应用于分析各种闭塞条件下的应力和变形.
主要成果:
- 内生材料类型对应力分布和变形的影响微不足道.
- 增加内冠高度通常会减少骨,牙周带和内冠本身的压力和变形.
- 较高的内冠 (4和6毫米) 与较短的内冠 (2毫米) 相比,其变形差异较小.
结论:
- 在确定机械行为方面,内生材料的选择不如其高度那么重要.
- 增加内冠高度有利于支结构,但增加了根和水泥的压力.
- 较高的内冠被推用于损害牙周状态,而较短的可能足以健康条件.
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