用清晰对齐器进行迷你螺杆辅助干脱稳的生物力学分析:一个三维有限元素研究
Runzhi Guo1, Xiang Yao Lam2, Liwen Zhang3
1Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China.
European journal of orthodontics
|December 22, 2023
概括
清晰对齐器治疗大大脱稳是通过迷你螺丝固定,特别是直接的部迷你螺丝固定增强. 这种方法增加了牙的运动,并减少了不必要的前牙倾斜.
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
- 牙科材料 牙科材料
背景情况:
- 尾大移位是一种常见的正统牙科手术.
- 透明对齐器为传统支架提供了一个不那么侵入性的替代品.
- 迷你螺旋 anchorage 在牙移动期间提供了更好的稳定性和控制.
研究的目的:
- 为了比较三种小螺杆 anchorage 类型在清晰对齐器介导的上大脱稳定过程中的生物力学效应.
- 评估牙移位和压力分布在牙周带 (PDL) 和根结构.
主要方法:
- 为四个组创建了三维有限元模型:控制,直接口腔小螺旋,直接口腔小螺旋和间接口腔小螺旋.
- 使用清晰对齐器模拟的上大分离.
- 分析了3D牙位移和根部和PDL的主要应力.
主要成果:
- 所有组都显示出类似的牙运动模式,但大小不同.
- 直接的 palatal 迷你螺旋 anchorage (C组) 导致了最大的牙脱稳.
- 直接的 palatal 和间接的 buccal 迷你螺杆 anchorage 组表现出减少前牙倾斜和减少切口根和 PDL 的压力.
结论:
- 迷你螺丝,特别是直接的 palatal 类型,提高了清晰的对齐器的有效性,以使尾大移位.
- 这种方法可以带来更大的牙运动,更少的前牙弥赛化,减少前牙发烧.
- 需要进一步的研究来探索对齐器治疗中牙运动阶段的动态性质.
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