后部恢复旋转扭矩与侧倾斜角度相关:一个概念验证
Thomas S Giugliano1, Young K Kim1, John F Bowley2
1Clinical Assistant Professor, Advanced Education Program in Prosthodontics, Department of Prosthodontics, New York University College of Dentistry, New York, NY.
The Journal of prosthetic dentistry
|November 2, 2023
概括
这项研究调查了离轴力如何影响牙冠稳定性的问题. 诸如角和准备高度等因素显著影响扭矩,影响恢复完整性.
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:
- 对后牙修复的异轴外力缺乏实验性研究.
- 了解这些力量对于预测恢复稳定性至关重要.
研究的目的:
- 为了确定塞力和骨倾斜角度之间的相互作用.
- 分析基底宽度和准备高度对扭矩力的影响.
- 在模拟前牙和牙中计算单冠修复的扭矩.
主要方法:
- 用三角形计算来确定模拟皇冠修复中产生的扭矩.
- 外轴力 (200N) 应用于不同的角角和准备高度.
- 动量臂是用直角三角形计算的,用于三个旋转轴.
主要成果:
- 扭矩值在7.5至372.8Ncm之间.
- 最高的扭矩发生在5毫米的牙形状中,其中有一个中根旋转轴和45度的牙倾斜.
- 的斜坡和中根轴产生了很大的动力臂;皇冠终点线轴产生了最低的扭矩.
结论:
- 骨倾斜角度,准备高度,底部宽度和旋转轴位置都会影响扭矩产生.
- 这些因素可能会影响牙冠修复的整体稳定性.
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