通过增量扭矩的方形和矩形支架槽产生的排位和应力进行比较分析:有限元分析研究研究:有限元分析研究
Sarvajith B Harsha1, Khadeer Riyaz1, Laxmikanth S Manjappa1
1Department of Orthodontics and Dentofacial Orthopedics, The Oxford Dental College, Bengaluru, IND.
Cureus
|November 15, 2024
概括
带有方形弧线的被动自带支架在上切口的有限元分析中显示,与带有矩形弧线的常规支架相比,具有更好的扭矩控制和更少的发挥.
科学领域:
- 矯正牙科 矯正牙科是一種矯正牙科.
- 生物材料工程 生物材料工程
- 计算力学 计算力学 计算力学
背景情况:
- 传统的金属支架和被动自结合支架在正牙科中使用.
- 了解压力和位移对于有效的正牙治疗至关重要.
研究的目的:
- 为了比较尾切口和皮层骨中的应力和位移.
- 分析使用常规与被动自结合支架系统的增量扭矩效应.
主要方法:
- 创建了一个3D有限元素分析 (FEA) 的部模型.
- 传统的MBT支架 (0.022x0.028英寸槽,矩形弧线) 与Pits 21TM自支架 (0.021x0.021英寸槽,方形弧线) 相比较.
- 应用增量扭矩 (5°-20°),评估·米塞斯应力,扭矩矩,倾斜角度和位移.
主要成果:
- 匹兹21TM系统的扭矩表达率 (13.8N-mm) 比传统支架 (10.68N-mm) 高.
- 匹兹21TM系统在20°扭矩下表现出较少的运动 (6.2°) 与传统支架 (9.32°) 相比.
- 增加的扭矩导致了切肢倾斜的增加,在1型车 (传统支架) 中更为明显. 在模型2 (Pitts 21TM) 中,对骨头和牙的压力更高.
结论:
- 带有方形弧线的被动自结合系统提供更好的扭矩表达和减少游戏.
- 匹兹21TM系统在扭矩控制方面表现出比传统支架系统更好的性能.
相关概念视频
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Consider the elastic torsion formula, which applies to a circular shaft with a consistent cross-section. This formula assumes that the shaft's ends are loaded with rigid plates firmly attached. However, in many cases, torques are applied to the shaft through mechanisms like flange couplings or gears, which are connected by keys inserted into keyways. This application method modifies the stress distribution near the point of torque application, causing it to deviate from the distributions...
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Designing a transmission shaft requires a thorough understanding of the stresses induced by bending moments and torques, especially in systems where power is transferred through gears. These forces create force-couple systems at the centers of the shaft's cross-sections, leading to both transverse and torsional loading. Although shearing stresses from transverse loads are typically smaller than those from torques and are often overlooked, the significant normal stresses from these loads...
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The shaft PQ is subjected to a twisting force when equal and opposite torques are applied on either side. A section that cuts perpendicular to the shaft's axis at any arbitrary point R is examined to understand this. When the free-body diagram of the QR segment is analyzed, it reveals the shearing forces exerted by the PR portion onto the QR segment as the shaft experiences twisting.
Applying equilibrium conditions to the QR segment establishes that the internal shearing forces within the...
Applying equilibrium conditions to the QR segment establishes that the internal shearing forces within the...
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