全陶固定部分假牙的承载能力 - - 在体外测试是否高估了强度?
The International journal of prosthodontics
|June 16, 2025
概括
测试模型显著影响了土牙假肢的承载能力. 这凸显了需要现实的,标准化的体外试验模型,以确保固定牙假体 (FDP) 的临床相关性.
科学领域:
- 生物材料科学 生物材料科学
- 牙科材料 牙科材料
- 机械工程 机械工程
背景情况:
- 单立体合金被广泛用于固定牙假肢 (FDP).
- 在体外测试对于评估FDP性能至关重要.
- 测试模型对FDP承载能力的影响需要进一步调查.
研究的目的:
- 评估不同的测试模型如何影响单体石三单元FDP的承载能力.
- 根据模型可变性评估体外试验结果的临床相关性.
主要方法:
- 制造了32个CAD设计的体三单元FDP.
- FDPs被树脂结合到四种不同的模具模型:PMMA (PM),玻璃纤维增强聚合物 (FR),CoCr合金 (NP) 和牙运动模拟 (TM).
- 进行了负载到故障测试,并对数据进行了统计分析.
主要成果:
- 在不同模型类型中,平均断裂值有显著差异:TM (1676 MPa),PM (1820 MPa),FR (2266 MPa) 和NP (4847 MPa).
- 在大多数模型组之间观察到显著的差异,除了TM和PM.
- 测试模型的选择明显影响陶FDP的测量断裂强度.
结论:
- 试验模型在体外显著影响单质石FDP的断裂负载值.
- 由于模型的可变性,当前的体外试验方法可能不准确地反映临床性能.
- 开发高度标准化,临床相关的测试方法对于可靠的FDP评估至关重要.
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