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嘴唇直径对内治疗前牙的生物力学影响,在闭塞负荷下恢复牙冠

Miao Liang¹, Lamu Zeyong², Yongheng Li³

¹Nanjing University, Affiliated Hospital of Medical School, Nanjing Stomatological Hospital, Department of General Dentistry, Nanjing, 210008, China.

Journal of applied oral science : revista FOB

|June 19, 2024

概括

嘴唇口腔直径显著影响冠状内牙治疗牙的压力. 缩小这个直径会增加应力,而杆则会提高核心稳定性和应力分布.

科学领域:

生物材料科学生物材料科学
牙科机械牙科机械
恢复性牙科恢复性牙科

背景情况:

经过内牙治疗 (ET) 的前牙需要皇冠修复才能恢复功能和美观.
了解这些恢复牙在闭塞负荷下的生物力学行为,对于长期成功至关重要.

研究的目的:

评估唇舌直径和修复结构如何影响ET前牙与皇冠修复的应力分布和生物机械安全.
为了比较牙直径与修复技术对压力模式的影响.

主要方法:

生成3D有限元模型的腹中央切口与全陶冠.
多种口唇直径 (6.85毫米,6.35毫米,5.85毫米),并测试了不同的修复结构 (生命脉,ET,ET带和后/核心,ET没有但带后/核心).
应用了闭塞负荷,并分析了·米塞斯应力分布和最大应力.

主要成果:

在所有模型中,最大应力始终集中在唇部部 1/3 的根部.
嘴唇的直径和结构都影响了最大的应力,直径的影响更大.
减少唇舌直径增加了最大应力;与非ferrule结构相比,ferrule显著减少了核心应力.

结论:

拉比双舌直径是一个关键因素,影响恢复的ET前牙的生物力学特征.
铁杆的存在有效地减少了核心应力,并促进了更均的应力分布.
这些发现强调了考虑牙尺寸和修复性设计的重要性,以优化内牙治疗前牙的寿命.

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