三种不同的植入物设计方法的压力强度评估
Pradyumna K Sahoo1, Smita R Priyadarshini2, Abhaya C Das3
1Department of Prosthodontics, Institute of Dental Sciences, Siksha 'O' Anusandhan (Deemed to be University), Khandagiri Square, Bhubaneswar, Odisha, India.
Journal of pharmacy & bioallied sciences
|September 11, 2023
概括
与Unipost和ITI系统相比,螺丝孔植入物连接显示出优越的静态压力强度. 这项研究突出了影响牙植入物稳定性的设计差异.
科学领域:
- 生物材料科学 生物材料科学
- 牙科植入物学 牙科植入物学
- 机械工程 机械工程
背景情况:
- 植入物-支架接口对于牙科修复成功至关重要.
- 了解不同植入物-支架连接的机械特性对于临床应用至关重要.
- 之前的研究已经探索了植入物-支柱稳定性的各个方面,但对特定设计的比较静态压力强度数据是有限的.
研究的目的:
- 评估和比较三个不同的牙科植入物-牙连接设计的静态压力强度.
- 在静态压力负载下识别与每个植入物支架系统相关的故障模式.
- 提供数据,可以根据机械性能来告知植入系统的选择.
主要方法:
- 测试了60个牙科植入物标本 (20个系统).
- 植入物使用专用持有装置对齐,并接受单向垂直静态压缩负荷.
- 一台通用测试机 (MTS 810) 将负载应用到故障之前,故障模式被宏观记录.
主要成果:
- 螺丝孔系统表现出最高的平均压力强度 (384.3 ± 37.1 psi).
- 联合邮政系统的平均压力强度为335.6 ± 22.7 psi.
- ITI 一件式支柱连接具有最低的平均压力强度 (245.3 ± 25.4 psi).
- 观察到连接强度的统计学上显著差异,特别是在Unipost系统.
结论:
- 与Unipost和ITI系统相比,螺丝孔植入物-支柱连接显示出更高的静态压力强度.
- 植入物-支架接口的机械性能根据设计而有很大差异.
- 这些发现对选择具有足够强度的植入系统有影响,以满足功能负载.
相关概念视频
Bearing Stress
Bearing stress refers to the contact pressure between two separate bodies. To visualize this, imagine a bolt thrust through a plate. The bolt applies a force to the plate, which exerts an equal but opposite force back onto the bolt. This force isn't just a singular entity but a compilation of numerous smaller forces distributed across the contact surface between the bolt and the plate.
Due to the intricacy of these microforces, an average value, known as bearing stress, is often used by...
Due to the intricacy of these microforces, an average value, known as bearing stress, is often used by...
Stress Concentrations
The concept of stress concentration is crucial for understanding how materials respond under bending stresses, particularly when there are irregularities or discontinuities in the material's geometry. Normally, stress in a symmetric member subjected to pure bending is assumed to be uniformly distributed across the entire cross-section. However, this assumption does not hold when there are variations in the cross-sectional geometry or the presence of notches and holes.
The stress concentration...
The stress concentration...


