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带有通道内延伸的体内冠和尾牙上的体柱:在体研究中
Quintessence international (Berlin, Germany : 1985)
|October 25, 2024
概括
与脉延伸或石柱相比,带有通道内延伸的石内冠在牙中显示出更好的应力分布. 这表明,带有内延伸的内冠是管理牙压力的优越修复性选择.
科学领域:
- 牙科材料科学 牙科材料科学
- 生物材料工程是生物材料的工程.
- 在牙科领域的有限元分析.
背景情况:
- 经过内牙治疗的牙需要恢复才能恢复功能和力量.
- 石内冠和柱子是常见的修复方案.
- 了解压力分布对于长期的恢复成功至关重要.
研究的目的:
- 为了比较尾牙中压力分布,用石恢复了石内冠 (肉腔或内通道延伸) 与石柱.
- 通过有限元分析评估不同基于的修复的生物力学性能.
主要方法:
- 创建了经过内治疗的上第一个牙的三维有限元素模型.
- 模型包括皮质骨,,牙周带,以及各种体修复 (内冠与脉腔延伸,内冠与内延伸,体帖子).
- 模型受到模拟的闭塞负荷 (400N),并分析了·米塞斯压力.
主要成果:
- 在施加负荷的点上观察到高压力度.
- 在任何模型中都没有发现三叉区域的应力.
- 恢复材料的应力:14.67 MPa (E+PCE),57.79 MPa (E+ICE),155.56 MPa (ZP) 的压力.
- 剩余的牙应力:47.04 MPa (E+PCE),32.85 MPa (E+ICE),33.42 MPa (ZP). 牙应力是指牙的压力.
结论:
- 带有通道内延伸的石内冠在修复材料和牙中表现出更有利的应力分布.
- 与柱和脉延伸内冠相比,内延伸内冠显示压力降低.
- 带有内延伸的内冠可能提供一种优质的修复解决方案,以最大限度地减少内牙治疗的牙中的压力.
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