在不同负载条件下使用球环,定位器和磁铁保持器连接器进行单体和双体植入过度开口的应力模式和分布的比较评估:有限元分析
Jatin Jain1, Rajesh Sethuraman2, Sayam Sachin Shah2
1Jain Wellness Center, Thane, Maharashtra, India.
Journal of Indian Prosthodontic Society
|January 3, 2025
概括
磁铁和定位器附着装置在与球附着装置相比,在植入物保留的超长合物中显示出更好的应力分布. 双边负荷条件导致这些牙假肢的压力模式更加均.
科学领域:
- 生物材料工程 生物材料工程
- 牙科植入物学 牙科植入物学
- 生物力学 生物力学
背景情况:
- 植入物保留过度承接为牙患者提供了更好的稳定性和功能.
- 了解压力分布对于长期的植入成功和患者舒适性至关重要.
研究的目的:
- 为了比较球,磁铁和定位器附着系统的应力分布特征.
- 评估这些系统在单体和双体植入物保留的超额承接中.
- 使用有限元法 (FEM) 进行内分析.
主要方法:
- 有限元分析 (FEA) 在6个模型上进行 (单种和双种植入物过度植入,具有3种附着类型).
- 创建了一个下完全假牙模型,具有特定的植入物尺寸.
- 施加负荷来模拟各种条件 (前面,单边,双边).
主要成果:
- 球形附件 (B1型) 显示了最高的应力度.
- 前部负荷产生了最大的压力,而双边负荷导致压力大小较小.
- 压力集中在尖顶骨,植入物项圈/连接和假肢支柱头上.
结论:
- 磁铁和定位器附着装置在植入物过度合中显示出更有利的应力分布.
- 双边负荷条件促进更均的应力模式,可能提高植入物寿命.
更多相关视频
07:09In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint
Published on: March 7, 2014
13.3K
07:16Author Spotlight: Development of a Novel Finite Element Analysis Model for Improved Orthognathic Surgical Techniques
Published on: October 20, 2023
1.2K
相关概念视频
Applications of Stress
247
Consider a structure made of a boom and a rod designed to support a load. These two components are connected by a pin and stabilized by brackets and pins. The boom and the rod are detached from their supports to assess the different stresses imposed on this structure, and a free-body diagram is drawn. Then, all the forces applied, including the load acting on the structure, are identified. The reaction forces exerted on both the boom and the rod are computed using the equilibrium equations.
The...
The...
247
Stress: General Loading Conditions
300
To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
300
Stresses under Combined Loadings
140
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...
140
Components of Stress
201
Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
Interestingly, the hidden cube faces also experience these stresses, equal and...
Interestingly, the hidden cube faces also experience these stresses, equal and...
201
Deformation of Member under Multiple Loadings
155
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
155
Design Consideration
180
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
The factor of safety is another key...
180
