一个一尺寸的植入物-支柱连接系统的旋转负荷疲劳性能
概括
宽基 (WB) 支柱在一尺寸植入物支柱 (OSIA) 系统中的宽直径植入物 (WDIs) 中表现出优越的疲劳性能. 增加植入物直径并没有提高常规基底支柱的疲劳抵抗力.
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:
- 一个尺寸的植入物-支架 (OSIA) 连接系统旨在实现假肢的多功能性.
- 了解不同植入物直径和支架平台的疲劳性能对于长期的临床成功至关重要.
研究的目的:
- 在OSIA连接系统中评估各种植入物直径和支架平台的旋转负载疲劳性能.
- 为了在模拟的临床负载条件下比较不同配置的疲劳阻力.
主要方法:
- 四个测试组使用狭窄,正规和宽直径的植入物与正规底部 (RB/WB) 或宽底部 (WB) 支柱建立.
- 一台旋转负载疲劳机器在10 Hz时向标本 (每组n=5) 施加了35 Ncm的曲矩.
- 记录了故障周期,并进行了统计分析 (双向ANOVA). 在故障模式和连接分析中使用了SEM和横截面.
主要成果:
- 宽直径植入物与宽底部 (WDI-WB) 支柱组超过了500万个周期,没有故障.
- 使用常规基 (RB/WB) 支柱的组在558,750到4,497,619个周期之间失败.
- 支架平台显著影响了疲劳性能 (P < .001),而植入物直径没有 (P = .857).
结论:
- 宽底部 (WB) 支柱在高风险情况下为宽直径植入物 (WDIs) 提供优越的疲劳性能.
- 一个尺寸的假肢连接限制了疲劳性能,从增加的植入物直径和常规的底部支柱中获益.
- 更大的植入物直径,即使有定期的基础支柱,也会导致更少的灾难性和更多的冠状失效,这可能有助于临床管理.
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