强力方向和冲击角度的影响在拉伤中冲击中部切刀引力:有限元分析
Qian Yang1, Liu Yang2, Ning Li3
1Binzhou Medical University, No. 346 Guanhai Road, Yantai, Shandong, 264000, China.
BMC oral health
|July 20, 2024
概括
拉力力方向和反转角度显著影响反转中央切刀 (ICI) 处理. 对于大反转角度,建议采用100°-110°的最佳力角,以保护根和牙周组织.
科学领域:
- ортодонтика 和 牙科 生物力学
- 仿真牙运动模拟器
背景情况:
- 受影响的中央切口 (ICI) 带来了复杂的正牙挑战.
- 不同的反转角度 (IA) 和引力方向 (FD) 可以影响反转ICI的治疗结果.
研究的目的:
- 分析不同力方向 (FD) 对具有多角度变化的发育逆转ICI的生物力学影响.
- 为优化逆转ICI治疗提供见解.
主要方法:
- 一种3D有限元法模拟了反向ICI引.
- 在前向上角 (90°-130°) 施加0.2N的力,对具有逆角 (0°-40°) 的ICI施加力.
- 评估了牙周带 (PDL) 和膜骨上的上角位移和Von Mises应力.
主要成果:
- 反向角度 (IA) 显著影响了膜骨应力分布和顶点位移,而不是力量方向 (FD).
- 较高的应力集中在PDL的顶部区域和膜骨的部/顶部区域.
- FD和IA对PDL应力分布的影响最小.
结论:
- 对于大IA (>20°) 倒置ICI,使用相对于ICI冠长轴的100°-110°的力角.
- 对于较小的IA,建议使用110°-120°的力角来保持根和牙周组织的健康.
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