不同辅助器对大切割刀扭矩控制与清晰对齐器的影响:有限元分析
Ya-Ya Hong1, Ting Kang2, Meng-Qi Zhou2
1Center for Plastic and Reconstructive Surgery, Department of Stomatology, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China; Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Clinical Research Center for Oral Diseases of Zhejiang Province, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, Zhejiang, China.
概括
清晰的对齐器附件显著影响牙的运动和压力. 半圆形的附着物改善了唇舌倾斜,而功率脊则增强了根部控制,但可能会导致不必要的切口扭曲.
科学领域:
- 矯正牙科 矯正牙科是一種矯正牙科.
- 生物材料科学 生物材料科学
- 生物机械工程 生物机械工程
背景情况:
- 透明对齐器越来越多地用于正牙治疗.
- 了解辅助器的生物力学影响对于优化清晰对齐器治疗至关重要.
- 有限元分析为模拟牙运动等复杂的生物系统提供了强大的工具.
研究的目的:
- 为了评估不同的清晰对齐器辅助器如何影响大中央切割刀扭矩和应力分布.
- 为了比较电源的效率,半圆形附件,水平矩形附件和水平气附件.
主要方法:
- 开发了大的3D有限元素模型,包括牙,牙周带和透明对齐器.
- 在五种配置中模拟了部中央切口器上的1°部根扭矩:没有辅助器,动力,半圆形连接,水平矩形连接和水平圆柱连接.
- 分析了每个模型的牙运动 (倾斜,侵入,旋转) 和牙周带应力分布.
主要成果:
- 如果没有辅助器,则1度的扭矩会导致唇部倾斜,面部倾斜和侵入.
- 半圆形附着模型显示了增加的唇舌倾斜变化和更均的应力分布.
- 动力脊模型显示改善了根部控制和减少了唇舌倾斜变化,但诱导了远端切口扭曲. 在不同模型中,压力集中在宫和顶区域.
结论:
- 半圆形附件在清晰对齐器处理期间有效控制唇舌倾斜.
- 电力脊提供了优越的根部控制,但存在诱导大切口的不良远部旋转的风险.
- 附着部位的选择对于实现可预测的牙运动和管理压力分布在清晰对齐器牙科中至关重要.
相关概念视频
01:12General Case of Eccentric Axial Loading
185
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
185
01:19Net Torque Calculations
9.1K
When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is the distance from the pivot point (the hex nut in this case) to the person’s hand. If this distance is large, the torque is higher. Only the component of the force perpendicular to the lever arm contributes to the torque. Therefore, pushing the wrench perpendicular to the lever arm is more advantageous. If multiple people apply force to...
9.1K
01:15Thin-Walled Hollow Shafts
186
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution...
186
01:24Bearings: Problem Solving
282
Understanding the calculations and concepts related to double-collar bearings is essential for engineers and designers to optimize the performance of these components in various applications. By analyzing the bearing under different conditions, one can ensure that it can withstand the forces and moments experienced during operation. This knowledge enables better decision-making when designing and selecting bearings for specific purposes and configurations. Consider a double-collar bearing with...
282
01:21Screw: Problem Solving
415
In mechanical engineering, the interaction between a threaded screw shaft and a plate gear involves analyzing the resisting torque on the plate gear that can be overpowered when a specific torsional moment is applied to the shaft. To better comprehend this concept, consider a generic situation with a threaded screw shaft with a given mean radius and lead and a plate gear with a specified mean radius. The coefficient of static friction between the screw and gear is also provided.
To evaluate the...
To evaluate the...
415