Department of General Surgery and Medical-Surgical Specialties, University of Catania, Catania, Italy.
CDT Private Practice, Bologna, Italy.
Minerva Dent Oral Sci. 2022 Aug;71(4):199-205. doi: 10.23736/S2724-6329.21.04595-2. Epub 2021 Sep 21.
The aim of this study was to compare the accuracy of 3 different devices for facial images acquisition, useful for prosthodontic esthetic preview.
Bidimensional extraoral photographs (Nikon D300), facial scans (Bellus3D) and 3D digital stereophotogrammetry photos (3dMD Face System) were acquired from 15 patients. The intraoral impressions of all subjects were digitally taken through a scanner (i500; Medit). Files obtained from each acquisition method were transferred on Exocad Software, and the measurements of the frontal teeth were performed and compared with those of the intraoral scans, assumed as reference. The data were statistically analyzed (Friedman and Dunn tests) with P<0.05.
As for central and lateral incisors, no significant difference emerged between 2D digital photography and intraoral scans, both in height and width. Measures obtained with Bellus3D significantly differed from the reference data in width of all teeth, except for central incisors. Values referred to canines were those more subjected to significant distortions in width for all devices.
Within the limits of this study, measures of frontal teeth acquired by 2D digital photography were similar to those of intraoral scans both in height and width, while those obtained with 3D facial scanners were more subjected to distortions in mesial-distal dimension.
本研究旨在比较 3 种不同设备在获取用于修复前美学预览的面部图像时的准确性。
从 15 名患者中获取二维（尼康 D300）、面部扫描（Bellus3D）和 3D 数字体视摄影（3dMD Face System）的面部照片。所有患者的口腔内印模均通过扫描仪（i500；Medit）进行数字化采集。从每种采集方法中获得的文件被传输到 Exocad 软件上，对前牙的测量值进行了测量，并与假定为参考的口腔内扫描结果进行了比较。数据采用 Friedman 和 Dunn 检验进行了统计学分析（P<0.05）。
对于中切牙和侧切牙，二维数字摄影和口腔内扫描在高度和宽度上均无显著差异。除了中切牙，Bellus3D 获得的测量值在所有牙齿的宽度上均与参考数据存在显著差异。对于所有设备，犬牙的宽度值更容易发生显著扭曲。
在本研究的范围内，二维数字摄影获取的前牙高度和宽度测量值与口腔内扫描相似，而 3D 面部扫描仪获取的测量值在近远中向维度上更容易发生扭曲。
