植入物 - 基底连接中的角的机械效应:有限元研究
Miho Tokumoto1, Tatsuya Matsuzaki2, Nobuo Sakai3
1Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higash-ku, Fukuoka, 812-8582, Japan.
International journal of implant dentistry
|January 16, 2026
概括
在植入物 - 支柱连接中,较小的缩角度可以改善压力保持,但会增加支柱移位和应力. 最佳的收缩角选择对于植入物稳定性和寿命至关重要.
科学领域:
- 生物材料工程 生物材料工程
- 机械工程 机械工程
- 牙科植入物学 牙科植入物学
背景情况:
- 植入物 - 支架连接对于牙科植入物生物力学至关重要.
- 了解缩角对连接稳定性的影响,对于长期植入成功至关重要.
研究的目的:
- 通过有限元分析,研究不同缩角度对植入物 - 支柱连接的机械行为的影响.
主要方法:
- 创建了植入组件的三维有限元模型,其角为8°,15°,18°和22°.
- 使用了线性弹性Ti-6Al-4V材料特性,在接口上与摩擦接触.
- 模拟包括预加载应用,释放以进行压缩适应性评估,以及循环加载 (垂直和水平).
主要成果:
- 较小的收缩角 (8°,15°) 在预加载释放后保持压力合适,与较大的角度 (18°,22°) 不一样.
- 渐变角的减少增加了支柱轴位移,植入应力和螺栓负载损失.
- 通过较小的角和循环加载过程中缩小了微隙.
结论:
- 收角显著影响植入物-支架的压力适合性,稳定性和应力分布.
- 较小的缩角度提高了压力适合性,但可能会导致更大的位移和应力.
- 研究结果强调了缩角度优化的重要性,以防止螺丝松动和微隙形成.
相关概念视频
01:15Thin-Walled Hollow Shafts
543
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 of...
543
01:18Stress Concentrations in Circular Shafts
544
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...
544