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Jia Qiao¹, Chen Zhao¹, Bo Ma¹

¹Department of Stomatology, Beijing Shijitan Hospital, Capital Medical University.

Journal of visualized experiments : JoVE

|November 17, 2025

概括

对238种牙制备的数字分析显示,根据牙的位置,总闭口收 (TOC) 角度有显著的变化. 牙经常超过推的TOC,这表明需要在修复性牙科中制定量身定制的准备指南.

科学领域:

牙科材料科学牙科材料科学
牙修复牙修复牙修复牙修复牙修复
数字牙科数字牙科

背景情况:

单立体石皇冠被广泛用于修复性牙科.
准确的准备参数对于成功的皇冠修复至关重要.
临床牙制备剂可能与理想的几何标准有所不同.

研究的目的:

通过使用改性数字技术,评估单立式石皇冠的准备参数.
研究牙位置对修复结果的影响.
为了评估全闭合收 (TOC) 角度,边缘周长和支柱高度.

主要方法:

使用口腔内扫描仪对238个准备好的后部支柱进行分析.
统计评估TOC角度,边缘周长和平均支柱高度.
在不同的牙位置和象限中比较制备参数.

主要成果:

所有后牙的平均TOC角度超过6°,观察到显著的变化.
部左第二牙显示出最大的平均 TOC 角度 (35.96 ± 20.21°).
发现TOC角度和边缘周长之间的正相关性,以及与支柱高度的负相关性.

结论:

临床石皇冠制剂经常偏离已建立的TOC建议.
可能需要量身定制的准备标准,特别是下牙.
数字分析软件对于假牙实践和教育非常有价值.

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