Schmidt Alexander, Klussmann Leona, Wöstmann Bernd, Schlenz Maximiliane Amelie
Justus Liebig University, Dental Clinic-Department of Prosthodontics, Schlangenzahl 14, 35392 Giessen, Germany.
J Clin Med. 2020 Mar 4;9(3):688. doi: 10.3390/jcm9030688.
The aim of this clinical study was to update the available data in the literature regarding the transfer accuracy (trueness/precision) of four current intraoral scanners (IOS) equipped with the latest software versions and to compare these data with conventional impressions (CVI). A metallic reference aid served as a reference dataset. Four digital impressions (Trios3Cart, Trios3Pod, Trios4Pod, and Primescan) and one CVI were investigated in five patients. Scan data were analyzed using three-dimensional analysis software and conventional models using a coordinate measurement machine. The transfer accuracy between the reference aid and the impression methods were compared. Differences with < 0.05 were considered to be statistically significant. Overall, mean ± standard deviation (SD) transfer accuracy ranged from 24.6 ± 17.7 µm (CVI) to 204.5 ± 182.1 µm (Trios3Pod). The Primescan yielded the lowest deviation for digital impressions (33.8 ± 31.5 µm), followed by Trios4Pod (65.2 ± 52.9 µm), Trios3Cart (84.7 ± 120.3 µm), and Trios3Pod. Within the limitations of this study, current IOS equipped with the latest software versions demonstrated less deviation for short-span distances compared with the conventional impression technique. However, for long-span distances, the conventional impression technique provided the lowest deviation. Overall, currently available IOS systems demonstrated improvement regarding transfer accuracy of full-arch scans in patients.
本临床研究的目的是更新文献中有关四款配备最新软件版本的口腔内扫描仪（IOS）的转移精度（准确性/精密度）的现有数据，并将这些数据与传统印模（CVI）进行比较。使用金属参考辅助工具作为参考数据集。对五名患者的四种数字印模（Trios3Cart、Trios3Pod、Trios4Pod和Primescan）和一种CVI进行了研究。使用三维分析软件分析扫描数据，使用坐标测量机分析传统模型。比较参考辅助工具与印模方法之间的转移精度。差异<0.05被认为具有统计学意义。总体而言，平均±标准差（SD）转移精度范围为24.6±17.7µm（CVI）至204.5±182.1µm（Trios3Pod）。Primescan在数字印模中偏差最小（33.8±31.5µm），其次是Trios4Pod（65.2±52.9µm）、Trios3Cart（84.7±120.3µm）和Trios3Pod。在本研究的局限性内，与传统印模技术相比，配备最新软件版本的当前IOS在短跨度距离上偏差较小。然而，对于长跨度距离，传统印模技术偏差最小。总体而言，目前可用的IOS系统在患者全牙弓扫描的转移精度方面有所提高。
