根长度和根表面积之间的几何关系,根据数字牙模型确定.
Chloe Xiao Wei Chan1, Wee Kheng Leow2, Alan Ho-Lun Cheng2
1Discipline of Orthodontics Faculty of Dentistry, National University of Singapore, Singapore.
Computers in biology and medicine
|April 17, 2025
概括
根表面积 (RSA) 和截面积 (CSA) 是理解根长度损失影响的关键. 根长度减少高达20%,保留了90%以上的总RSA,特别是在牙上.
科学领域:
- 牙科解剖学 牙科解剖学
- 生物机械工程 生物机械工程
- 牙周病学 牙周病学
背景情况:
- 外部角根再吸收 (EARR) 可能会损害牙的稳定性.
- 评估根长度 (RL) 减少的临床影响需要了解其对根表面积 (RSA) 的影响.
研究的目的:
- 调查根长度 (RL) 和根表面积 (RSA) 在永久大牙和下牙之间的相关性.
- 量化模拟根长度减小对根总表面积 (tRSA) 的影响.
主要方法:
- 从日本成年男性人口中生成人类牙的3D模型.
- 使用Python算法来模拟1毫米的增量缩短根.
- 通过总结周长面积 (cRSA) 和横截面积 (CSA) 计算的总根表面积 (tRSA).
主要成果:
- 大和下第一个牙有最大的tRSAs.
- 最初3毫米的根缩短导致大多数牙的tRSA减少<7%.
- 超过3毫米,tRSA的减少平均为19.4% (大) 和27.77% (下).
- 随着RL减少的增加,CSA比例增加,对tRSA有显著的贡献.
结论:
- RSA和CSA对于评估RL损失的临床影响至关重要,而不仅仅是单独的RL.
- 最多可达20% (大约. 3毫米) RL损失保留了超过90%的tRSA.
- 牙具有较高的CSA,像牙一样,尽管有显著的RL损失,但更好地保持牙周支.
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