Rutkunas V, Gedrimiene A, Adaskevicius R, Al-Haj Husain N, Özcan M
Vilnius University.
Department of Electrical Power Systems, Faculty of Electrical and Electronics Engineering, Kaunas University of Technology, Lithuania
Eur J Prosthodont Restor Dent. 2020 Nov 30;28(4):173-181. doi: 10.1922/EJPRD_02028Rutkunas09.
The aim of this study was to compare the clinical accuracy of digital and conventional dental implant impressions. Two types of implant impressions were made for each case, namely a conventional open-tray impression and a digital implant impression (DII) using a Trios IOS. Master casts were scanned using a D800 laboratory scanner and STL files were retrieved from conventional and digital workflows to be exported for comparison. The distance between center points, angulation, rotation, vertical shift, and surface mismatch of the scan bodies were evaluated and compared between conventional and digital impression techniques. Comparing digital and conventional impression techniques the following factors showed statistically significant differences: distance (73.7±75 μm), angulation (0.42±0.3°), and surface mismatch of scan bodies. The difference in conventional and digital impression techniques as regards to angulation and distance between the implants were associated with distance, angle, and vertical shift differences in scan. The mismatch of the scanned surface of scan bodies was twice higher for the intraoral scanner group. Clinicians should therefore control the implant suprastructures clinically and also using casts (e.g. printed casts) when a digital scan is planned.
本研究的目的是比较数字化和传统牙种植体印模的临床准确性。对每个病例制作两种类型的种植体印模，即传统的开放式托盘印模和使用Trios口腔内扫描仪的数字化种植体印模（DII）。使用D800实验室扫描仪对主模型进行扫描，并从传统和数字化工作流程中获取STL文件以导出进行比较。评估并比较了传统和数字化印模技术中扫描体中心点之间的距离、角度、旋转、垂直位移和表面不匹配情况。比较数字化和传统印模技术时，以下因素显示出统计学上的显著差异：距离（73.7±75μm）、角度（0.42±0.3°）和扫描体的表面不匹配。传统和数字化印模技术在种植体角度和距离方面的差异与扫描中的距离、角度和垂直位移差异有关。口腔内扫描仪组扫描体扫描表面的不匹配程度高出两倍。因此，临床医生在计划进行数字化扫描时，应在临床上并使用模型（如打印模型）来控制种植体上部结构。
