优化下二肌肉化:使用与非线性有限元素模型的绑回和临时骨 anchorage 装置辅助机制进行应力分布和位移的比较分析
Cem Olmez1, Koray Halicioglu1, Gulay Dumanli Gok2
1Department of Orthodontics, Faculty of Dentistry, Biruni University, Istanbul, Turkey.
概括
与传统方法相比,临时骨架固定装置 (TSAD) 为下第二牙提供了优越的牙移动. TSADs提供了更大的翻译与更少的倾斜,虽然他们增加膜骨应力,这可以通过特定的切口技术减轻.
科学领域:
- 矯正牙科 矯正牙科是一種矯正牙科.
- 生物机械工程 生物机械工程
- 牙科机械 牙科机械
背景情况:
- 第一个子提取需要第一个子 (M2M) mesialization 的策略.
- 最佳的M2M半导体化方法需要评估,特别是在骨固定装置 (TSAD) 支持的卷轴弹和绑回技术方面.
研究的目的:
- 为了比较TSAD支持的卷轴弹和M2M mesialization在下第一个牙提取患者的绑定机制的疗效.
- 用有限元分析分析在不同手术场景下 (皮质切除术辅助与无辅助) 分析应力分布和位移模式.
主要方法:
- 开发了六个有限元模型,模拟M2M的 mesialization,使用基于子的绑定背或使用动力臂和卷轴弹的TSAD.
- 在不同强力负荷下,比较了带有和没有带有半径或周长切口的半径化技术.
- 测量了牙的总和方向移位 (x,y,z轴) 和·米塞斯应力分布.
主要成果:
- 与模型相比,TSAD模型表现出明显更大的 mesial translation 和根运动,与最小的远端倾斜相比.
- 与TSAD模型相比,模型表现出更多的 mesial 倾斜,更少的挤出和减少的舌头旋转.
- TSAD模型显示膜骨应力增加,由周边切口减少;切口切口没有加快位移.
结论:
- TSAD机械促进更有效的下第二的 mesial 翻译与受控的倾斜.
- 周围切口与TSAD anchorage结合,有效地减少不必要的牙运动,并减少对膜骨的压力.
- 虽然有限元分析提供了有价值的见解,但临床验证对于确认这些生物力学发现至关重要.
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