Wu Wei-Ling, Wang Chin-Wei, Nam Hui-Yin, Lin Wei-Chun
School of Dental Technology, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.
School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.
J Dent Sci. 2025 Jul;20(3):1447-1453. doi: 10.1016/j.jds.2025.01.030. Epub 2025 Feb 6.
BACKGROUND/PURPOSE: Digital dental scanning systems play a crucial role in producing precise dental restorations. This study aimed to evaluate the impact of different dental scanning devices on the trueness and precision of crown margins designed from digital models. It also focused on the influence of scanners and design software system alignment.
A standard dental cast was scanned using two intraoral scanners (Trios 3, Primescan) and three desktop scanners (S3, E3, X5). Crown designs were created for each cast using dental design software (inLab SW 16.1, Dentsply Sirona), resulting in a total of 25 digital crown files. These files retained only a 1 mm height from the cervical margin toward the occlusal direction for margin analysis. Root mean square error (RMSE) values were calculated to assess trueness and precision.
The trueness values for the same scanner ranged from 23.4 ± 4.1 μm to 42.1 ± 11.8 μm. Primescan (23.4 ± 4.1 μm) and X5 (29.7 ± 7.0 μm), which belonged to the same system as the design software, demonstrated superior accuracy ( > 0.05). No significant difference in trueness was observed between the intraoral scanner (Primescan) and the desktop scanner (X5) within the same system ( > 0.05). However, significant differences in trueness and precision were identified between systems ( < 0.05).
The type of scanner and its system alignment significantly influenced the accuracy of crown margins. Ensuring compatibility between scanning devices and design software in clinical practice could enhance the precision of dental restorations.
背景/目的：数字牙科扫描系统在制作精确的牙齿修复体方面起着至关重要的作用。本研究旨在评估不同牙科扫描设备对从数字模型设计的冠边缘的真实性和精度的影响。它还关注扫描仪和设计软件系统对齐的影响。
使用两台口内扫描仪（Trios 3、Primescan）和三台桌面扫描仪（S3、E3、X5）对标准牙模进行扫描。使用牙科设计软件（inLab SW 16.1，登士柏西诺德）为每个牙模创建冠设计，共产生25个数字冠文件。这些文件从颈缘向咬合方向仅保留1毫米高度用于边缘分析。计算均方根误差（RMSE）值以评估真实性和精度。
同一扫描仪的真实性值范围为23.4±4.1μm至42.1±11.8μm。与设计软件属于同一系统的Primescan（23.4±4.1μm）和X5（29.7±7.0μm）显示出更高的精度（>0.05）。同一系统内口内扫描仪（Primescan）和桌面扫描仪（X5）之间在真实性上未观察到显著差异（>0.05）。然而，不同系统之间在真实性和精度上存在显著差异（<0.05）。
扫描仪的类型及其系统对齐对冠边缘的精度有显著影响。在临床实践中确保扫描设备与设计软件之间的兼容性可以提高牙齿修复体的精度。
