内冠和口腔内扫描:从六台扫描仪对网状真实性的细分分析
Leandro Cardoso1, Camila Tirapelli2, Bruna Neves de Freitas3
1Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
Journal of dentistry
|December 22, 2025
概括
对于内冠制剂的数字扫描真实性在ferrule存在时在边缘下降. 内壁显示高精度,但脉壁精度因口腔内扫描仪类型而异.
科学领域:
- 牙科技术 牙科技术
- 数字牙科数字牙科
- 牙修复 牙修复 牙修复 牙修复 牙修复
背景情况:
- 内口扫描仪 (IOS) 越来越多地用于数字印记.
- 内冠制剂需要高精度才能成功地进行修复.
- IOS扫描的真实性可以受到准备设计和扫描区域的影响.
研究的目的:
- 评估数字扫描对不同设计 (ferrule vs. non-ferrule) 和准备区域的内冠制剂的真实性.
- 为了比较六种不同的口内扫描仪的性能.
- 为了研究网状顶点密度和扫描真实性之间的关系.
主要方法:
- 为内冠 (带/不带) 准备了两颗类型牙.
- 使用工业扫描仪获得参考扫描.
- 实验性扫描用6个IOS设备进行 (每台扫描器n=10).
- 在特定的准备区域 (边缘,轴,脉壁) 分析了扫描的真实性 (根平均平方值).
主要成果:
- 扫描真实性因存在和制备区域 (p < .0001) 而有显著差异.
- 准备的边缘区域在所有扫描仪中显示出最低的真实性.
- 内部墙壁表现出最高的真实性 (0.013-0.025毫米的差异).
- 扫描仪之间的脉壁真实性不同;有些显示出高精度,而另一些则与准备有更大的差异.
- 网状顶点密度和真实性之间没有发现相关性.
结论:
- 在内冠制剂中的存在会对数字扫描的真实性产生负面影响,特别是在边缘.
- 内部准备墙壁的扫描精度很高,不管有没有.
- 选择口腔内扫描仪会影响脉壁扫描的真实性.
- 准备设计是影响IOS准确性的关键因素;单独的网格密度不是一个可靠的指标.
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