框架材料和设计对可拆卸部分假牙的生物力学行为的影响:聚乙基和-的有限元素比较
Nor Faharina Abdul Hamid1, Rohana Ahmad1, Saiful Islam Izra'ai2
1Centre of Studies for Restorative Dentistry, Universiti Teknologi MARA, Sungai Buloh, Selangor, Malaysia.
概括
可拆卸部分假牙 (RPD) 的最佳主要连接器设计取决于框架材料. PEEK RPD 可能会从条形设计中受益,而 CoCr RPD 在条形设计中表现出更好的应力分布.
科学领域:
- 生物材料科学是生物材料的科学.
- 牙假体 牙假体 牙假体 牙假体
- 有限元素分析的研究.
背景情况:
- 可拆卸部分假牙 (RPD) 对于恢复功能和美观至关重要.
- 主连接器设计显著影响生物力学负载分布.
- 材料选择 (PEEK与CoCr) 影响RPD性能.
研究的目的:
- 评估不同主要连接器设计 (语言板与语言条) 和框架材料 (PEEK与CoCr) 对RPDs的生物力学影响.
- 分析框架中的变形和应力分布,牙周带 (PDL) 和支性粘膜.
- 用有限元分析 (FEA) 进行全面的生物力学评估.
主要方法:
- 用圆束计算机断层扫描和主模型扫描数据来创建RPD模型.
- 分析了两个RPD设计 (语言板和语言条).
- 有限元素分析 (FEA) 模拟了120N的双边压力,以评估变形和·米塞斯应力.
主要成果:
- 对于PEEK框架,条形设计减少了框架/粘膜变形,但增加了PDL变形和应力.
- 对于CoCr框架,条形设计减少了框架/粘膜变形,并减少了与板相比所有结构的应力.
- 观察到特定于材料的反应,CoCr在条形设计中显示出更有利的应力分布.
结论:
- 对RPD的主要连接器设计的选择取决于材料.
- 一个PEEK棒的设计可能适合金属敏感和坚固的支柱的患者.
- 一个CoCr棒的设计提供了优越的应力分布,而一个板的设计可能适合于特定的临床场景与强大的支柱.
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