Mourouzis Petros
Department of Operative Dentistry, Division of Dental Tissues Pathology and Therapeutics, Aristotle University University Campus, Faculty of Dentistry University Campus, Agiou Dimitriou Str., 54121, Thessaloniki, Greece.
Comput Biol Med. 2025 Mar;187:109780. doi: 10.1016/j.compbiomed.2025.109780. Epub 2025 Feb 6.
This in vitro study aimed to identify the key methodological factors influencing the accuracy of intraoral scanners (IOS). The primary factors analyzed included the length of the scanned area, the total number of alignment points, the software used for analysis, and the operator's expertise. Three IOS systems were assessed-CEREC Primescan, Trios 3, and Omnicam-along with a laboratory desktop scanner (inEos X5). Scans were performed on a mandibular typodont, with the Root Mean Square (RMS) error used to measure the discrepancies between reference and experimental scans. The results indicated that the length of the scanned area significantly affected the RMS values, with full-arch scans producing greater errors compared to those of quadrant scans. Additionally, the total number of alignment points in the standard tessellation language files positively influenced accuracy, although improvements plateaued beyond 20 points. The choice of processing software also impacted accuracy, with Geomagic Control X yielding significantly lower RMS values than those of MeshLab and CloudCompare. Finally, user expertise played a significant role in scanning accuracy, with the experience user achieving more precise results, especially when using the Trios 3 scanner. Thus, the length of the scan, number of alignment points, software tools, and operator expertise significantly influence the accuracy of IOS, highlighting the importance of considering these methodological factors in both clinical and research settings for digital impressions.
这项体外研究旨在确定影响口腔内扫描仪（IOS）准确性的关键方法学因素。分析的主要因素包括扫描区域的长度、对齐点的总数、用于分析的软件以及操作人员的专业知识。评估了三种IOS系统——CEREC Primescan、Trios 3和Omnicam——以及一台实验室台式扫描仪（inEos X5）。在下颌模型牙上进行扫描，使用均方根（RMS）误差来测量参考扫描和实验扫描之间的差异。结果表明，扫描区域的长度对RMS值有显著影响，与象限扫描相比，全牙弓扫描产生的误差更大。此外，标准细分语言文件中的对齐点总数对准确性有积极影响，尽管超过20个点后改进趋于平稳。处理软件的选择也会影响准确性，Geomagic Control X产生的RMS值明显低于MeshLab和CloudCompare。最后，用户专业知识在扫描准确性中起着重要作用，经验丰富的用户能获得更精确的结果，尤其是在使用Trios 3扫描仪时。因此，扫描长度、对齐点数、软件工具和操作人员专业知识显著影响IOS的准确性，突出了在临床和研究环境中进行数字印模时考虑这些方法学因素的重要性。
