在下终点线进行口腔内扫描是否会影响临时冠状的准确性?
Young-Tak Son1,2, Keunbada Son2, Ji-Min Lee1,2
1Department of Dental Science, Graduate School, Kyungpook National University, Daegu 41566, Republic of Korea.
Journal of functional biomaterials
|September 26, 2025
概括
牙收缩对于精确的口内扫描牙下边缘至关重要. 忽略它会导致中期皇冠适合性差,特别是带有更深的边缘. 使用收缩用于精确的数字牙印记.
科学领域:
- 数字牙科数字牙科
- 牙修复 牙修复 牙修复 牙修复 牙修复
- 牙科材料科学 牙科材料科学
背景情况:
- 内口扫描仪 (IOS) 越来越多地用于数字印记.
- 下终点线对准确的IOS数据采集提出了挑战.
- 牙收缩技术可能会影响扫描准确性和假肢适合性.
研究的目的:
- 为了评估下牙终点线深度和牙收缩对3D打印的IOS数据制造的临时皇冠内部表面真实性和边缘/内部适合性的影响.
主要方法:
- 大第一个准备有不同的subgingival终点线深度 (0-1.00毫米).
- 嘴内扫描用或没有牙收缩进行.
- 设计和3D打印的临时皇冠;使用3D检查软件和复制技术评估真实性和合适性.
主要成果:
- 在没有牙收缩的情况下,随着终点线深度的增加 (p < 0.05),内部真实性和皇冠适合性显著下降.
- 在1.00毫米深度没有收缩的情况下,真实性 (100.1 ± 44.5μm) 和边缘适合性 (189.1 ± 42.2μm) 超过了临床值.
- 随着牙收缩,真实性和适合性在所有深度保持在可接受的临床限制内.
结论:
- 增加牙下终点线深度显著降低了口内扫描的准确性和当牙收缩被遗漏时的临时皇冠适应.
- 牙收缩对于实现临床上可接受的内部真实性和对牙下修复的边缘适合性至关重要.
- 在用于制造子牙假肢的口腔内扫描期间,建议使用收回绳进行牙周位移.
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