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复合休息座椅的断裂强度:不同复合材料与合金修复的体外比较研究

Shaimaa M Fouda¹, Passent Ellakany¹, Mohammed M Gad¹

¹Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia.

Materials (Basel, Switzerland)

|July 14, 2023

概括

这项研究发现,复合修复在可拆卸部分假牙 (RPD) 中用于闭塞休息时,提供与合金修复相比较的骨折强度. 这两种材料在老化和加载后表现相似,这表明复合材料是可行的替代品.

科学领域:

牙科材料科学牙科材料科学
牙修复牙修复牙修复牙修复牙修复
生物材料工程生物材料工程

背景情况:

在支可拆卸部分假牙 (RPD) 时,口腔休息非常重要.
休息椅的准备通常是在质中进行的,但支柱牙通常需要修复.
恢复的支柱的机械完整性对于RPD的成功至关重要.

研究的目的:

为了比较使用复合材料恢复的支柱牙的断裂强度与在休息座椅准备后的合金.
评估不同修复材料在模拟的临床条件下对支柱的机械行为的影响.

主要方法:

提取的人类大前被准备了disto-occlusal腔,并用合金或复合材料 (Tetric N-Ceram) 恢复.
标本经历了热力学老化和循环负荷,以模拟口内条件.
使用通用测试机评估了断裂强度,并分析了断裂模式.

主要成果:

在合金和复合材料修复组之间没有观察到骨折强度的显著差异.
合金表现出最高的断裂强度,而Tetric N-Ceram复合材料显示出最低的强度.
与合金相比,复合修复表明非灾难性骨折的发生率更高,骨折部位分布更广泛.

结论:

复合修复提供了与合金修复预制休息座椅相比较的断裂强度.
复合材料可能具有有利的断裂特性,包括较高比例的非灾难性故障.
这些发现支持使用复合修复作为支柱牙支RPD的可行选择.

关键词:

复合牙科树脂是一种复合牙科树脂.牙科材料牙科材料骨折强度强度的断裂强度是什么可拆卸的部分假牙.

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