基于光学连贯性断层扫描的数字图像相关性分析对聚合缩小的评估-第一部分:参数识别
Wei-Chi Chen1, Shu-Fen Chuang2, Po-Chun Tseng3
1School of Dentistry and Institute of Oral Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Dentistry, Sin-Lau Hospital, Tainan, Taiwan.
概括
基于光学连贯断层扫描 (OCT) 的数字图像相关性 (DIC) 是可行的,用于测量牙材料聚合收缩. 空白材料产生最好的结果,避免反射粒子进行准确的分析.
科学领域:
- 生物材料科学 生物材料科学
- 牙科材料 牙科材料
- 光学计量学 在光学计量学
背景情况:
- 基于树脂的牙复合材料的聚合收缩是一个重要的临床问题.
- 精确测量这种收缩对于材料开发和临床成功至关重要.
- 现有的测量技术可能在精度或适用性方面存在局限性.
研究的目的:
- 评估使用光学连贯断层扫描 (OCT) 与数字图像相关性 (DIC) 结合用于测量聚合收缩的可行性.
- 为了确定基于OCT的DIC分析的最佳实验参数.
- 评估材料组成对分析质量的影响.
主要方法:
- 牛切口的I类腔被填充了一个可流动的树脂 (Filtek Z350XT可流动).
- 在聚合修复上进行了OCT成像,用于DIC分析使用了虚拟和物理位移方法.
- 研究了子集大小对DIC精度的影响以及添加的颗粒 (玻璃珠,) 的影响.
主要成果:
- 基于OCT的DIC分析表明,虚拟运动的相关性高 (>99.99%),物理运动的误差低 (<5.21%).
- 确定了51x51像素的最佳子集大小,以平衡精度和计算时间.
- 添加反射颗粒 (玻璃珠,) 干扰了OCT成像,破坏了DIC分析;空白材料提供了最好的结果.
结论:
- 基于OCT的DIC分析是一种可行的方法,用于测量基于树脂的牙科修复中的聚合收缩.
- 仔细选择子集大小对于优化DIC分析参数至关重要.
- 在这种OCT-DIC方法中不建议使用高反射或低反射粒子.
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