通过有限元分析,评估周 implant 骨应力分布与附着类型和植入物位置的影响使用有限元分析
Shima Aalaei1, Atefeh Sheikhi2, Parisa Mehdian2
1Department of Prosthodontics, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
概括
不对称的植入物放置在下过度合中会导致一个植入物承受更多的负载. 这项研究分析了植入周骨的应力分布,发现侧切口植入物在前部负荷时经历了更高的应力.
科学领域:
- 牙科植入物学 牙科植入物学
- 生物机械工程 生物机械工程
- 有限元分析 有限元分析
背景情况:
- 围部植入器骨压力对于下部过度开口成功至关重要.
- 不对称的植入物放置可以改变负载分布.
- 了解压力模式可以为最佳的植入物定位和假肢设计提供信息.
研究的目的:
- 为了评估围部植入物骨中的应力分布,用于下过度牙,以不对称地放置植入物.
- 为了比较条形和球形固定系统之间的应力模式.
- 为了确定哪种植入物在不同的负载条件下承受更高的闭塞负荷.
主要方法:
- 患者下的计算机断层扫描 (CT) 扫描.
- 有限元分析 (FEA) 用于模拟应力分布.
- 在两种固定装置类型 (杆和球) 上施加前侧和双侧后侧闭塞负荷.
主要成果:
- 在侧切口位置的植入物在前部负荷下表现出最高的最大主应力 (大约33MPa).
- 在后部负荷下,狗级植入物显示出更高的应力值 (约22MPa).
- 在压力分布方面,对于条形固定系统而不是球形固定系统,没有发现明显的优势.
结论:
- 不对称的植入物放置在下部植入物支持的过度植入物中,导致一个植入物充当支点,承受更大的闭塞负荷.
- 条形连接系统与球形连接系统相比,没有显示出优越的应力分布.
- 研究结果表明,应仔细考虑植入物定位,以管理应力分布,并确保长期超长期稳定性.
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