不同的后台材料和设计对上部中央牙扭矩和侵入负荷的影响:有限元分析研究研究
Farhad Salmanpour1, Hasan Camcı1
1Department of Orthodontics, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey.
International orthodontics
|August 24, 2024
概括
牙后部材料和具的存在会在正牙治疗期间影响牙的压力. 没有杆的玻璃纤维杆显示压力更高,但这两种材料在正牙力下使用是安全的.
科学领域:
- 牙科材料科学 牙科材料科学
- 生物机械分析分析
- ортодонтическое 治疗 ортодонтическое 治疗
背景情况:
- 牙后材料和在恢复经过内牙治疗的牙方面至关重要.
- 了解他们在正力下的生物力学行为,对于治疗成功至关重要.
研究的目的:
- 为了研究后物质类型和铁杆存在对部中央切刀的扭矩和侵入负荷的影响.
- 通过有限元分析分析应力分布.
主要方法:
- 创建了三维有限元素模型的腹中央切口和周围组织.
- 模拟包括金属造柱,带有和没有铁杆的玻璃纤维柱,以及冠.
- 应用扭矩和入侵负荷来模拟正力,并分析最大主应力 (MPS).
主要成果:
- 在没有铁杆的玻璃纤维柱子模型中观察到最高的应力值.
- 铁杆的存在大大减少了约50%的压力,无论是入侵还是扭矩.
- 最大的压力始终局部存在于舌面上根的部三分之一.
结论:
- 后材料类型影响了牙根内的应力分布和定位.
- 观察到的应力变化处于安全范围之内,这表明这两种材料在正力下都适合使用.
- 铁杆在减轻压力度方面发挥着重要作用.
更多相关视频
07:42Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
338
08:46Force System with Vertical V-Bends: A 3D In Vitro Assessment of Elastic and Rigid Rectangular Archwires
Published on: July 24, 2018
10.6K
相关概念视频
Thin-Walled Hollow Shafts
176
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...
176
Residual Stresses in Circular Shafts
165
In materials that exhibit elastic and plastic behavior, known as elastoplastic materials, residual stresses can accumulate when these materials experience plastic deformation. This deformation arises from either high levels of shearing stress or significant strains. Residual stresses are internal stresses that persist within a material after removing the external force causing deformation. This phenomenon is demonstrated when observing the behavior of a shaft under torque; notably, the...
165
Circular Shafts - Elastoplastic Materials
101
The study of solid circular shafts under stress shows that within the elastic limit, stress increases directly to the distance from the shaft's center. This relationship holds until the shaft reaches a critical point of stress, beyond which it begins to yield, marking the transition from elastic to plastic deformation. At this crucial juncture, the maximum torque the shaft can endure without permanent deformation is determined, signifying the limit of its elastic behavior.
As torque on the...
As torque on the...
101
Stresses under Combined Loadings
147
When analyzing a bent tube with a circular cross-section subjected to multiple forces, it is crucial to determine the stress distribution in order to maintain structural integrity under varied load conditions.
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
147
Eccentric Axial Loading in a Plane of Symmetry
176
Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
176
Design of Transmission Shafts - Stress Analysis
332
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...
332
