在理想的保留条件下,用清晰的对齐器侵入大切口的效果:使用局部坐标系的有限元研究
Duy Nguyen1, Thong Tri Dang1, Thuy-Trang Thi Ho1
1Faculty of Dentistry, University of Medicine and Pharmacy, Ho Chi Minh City, Viet Nam.
International orthodontics
|February 24, 2026
概括
清晰对齐器疗法 (CAT) 实现了52%的编程大右中央切口插入,导致轻微的倾斜和缩的牙周带 (PDL) 应力. 邻近的牙经历了挤出和远端倾斜,突出了有限元素方法 (FEM) 研究中需要详细分析的需要.
科学领域:
- ортодонтика 和 牙科 生物力学
- 生物材料科学 生物材料科学
- 计算建模 计算建模
背景情况:
- 清晰对齐疗法 (CAT) 是一种流行的正义牙科治疗方法.
- 了解牙位移和牙周带 (PDL) 应力对于有效的CAT至关重要.
- 有限元法 (FEM) 是模拟正力和预测结果的宝贵工具.
研究的目的:
- 在CAT过程中评估牙的初始移位模式和顶门中PDL应力.
- 使用FEM分析0.25毫米部右侧中央切口 (UR1) 的侵入效应.
- 评估编程入侵的准确性,并确定潜在的副作用.
主要方法:
- 从CBCT数据创建了大牙,PDL和气囊骨的3D FEM模型.
- 一个0.7毫米的皮对齐器被设计为诱导UR1.1.的0.25毫米入侵.
- 使用ANSYS Workbench计算了牙位移和·米塞斯应力,模拟了理想的保留.
主要成果:
- UR1经历了大约52%的编程入侵 (0.13毫米),轻微的远端-舌头倾斜.
- 邻近的牙显示出轻微的挤出和远端倾斜,而牙则显示出最小的侵入和远端倾斜.
- 最高的PDL压力集中在UR1 (441.462kPa) 上,宫压力集中在相邻的牙上.
结论:
- 用CAT的0.25mm入侵步骤产生光力,导致UR1.1的部分入侵和轻微倾斜.
- 牙经历了挤出和远端倾斜,表明潜在的副作用.
- 使用牙特定局部轴的FEM分析对于识别牙治疗中微妙的,临床相关的结果至关重要.
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