Nogueira Básia R, Oliveira Junior Osmir B, de Sousa Gomes Costa Joatan L, Zanetti Thomaz Faraco, Pretel Hermes
Department of Restorative Dentistry, Araraquara School of Dentistry, São Paulo State University-UNESP, Araraquara, Brazil.
Department of Mechanical Engineering, School of Engineering of São Carlos (EESC), University of São Paulo - USP, Araraquara, Brazil.
J Esthet Restor Dent. 2023 Apr;35(3):508-516. doi: 10.1111/jerd.12987. Epub 2022 Dec 2.
To evaluate the accuracy of facial measurements on three-dimensional images obtained using a new photogrammetric scanner.
A total of 11 participants were included in the study. Nine customized adhesive labels were used to identify the facial landmarks: Trichion (Tri), Glabella (G), Right (Exr) and Left (Exl), Pronasal (Pn), Subnasal (Sn), Chelion right (Chr) and left (Chl) and Mentonian (Me). Two trained and calibrated examiners were responsible for performing seven linear measurements for each participant (Tri-G, Sn-Me, Exr-Exl, Chr-Chl, Exr-Chr, Exl-Chl, Pn-Sn) first with a digital caliper and later with a three-dimensional model obtained after digitalization with photogrammetric technology. The intraclass correlation coefficient (ICC), mean difference, SD, and Bland-Altman correlation were used to compare the measurements performed.
Intra and inter-examiner reliability were excellent (ICC >0.9). In general, the measurements presented a variation of a minor 2.0 mm. However, only three measures (Sn-Me, Exr-Exl, and Exr-Chr) were outside the clinical acceptability range.
The 3D Cloner scanner showed clinically acceptable accuracy comparable to the digital caliper with a variation of -0.8 ± 1.2 mm. Inter- and intra-examiner agreement on digital measurements was also observed.
Scanners with accurate 3D model reproductions associated with reliable digital measurements provide a more precise diagnosis and better planning in orofacial treatment.
评估使用新型摄影测量扫描仪获取的三维图像上面部测量的准确性。
本研究共纳入11名参与者。使用9个定制的粘性标签来识别面部标志点：发际点（Tri）、眉间点（G）、右侧（Exr）和左侧（Exl）、鼻前点（Pn）、鼻下点（Sn）、右侧口角点（Chr）和左侧口角点（Chl）以及颏下点（Me）。两名经过培训和校准的检查者负责首先使用数字卡尺，然后使用摄影测量技术数字化后获得的三维模型，对每位参与者进行七项线性测量（Tri - G、Sn - Me、Exr - Exl、Chr - Chl、Exr - Chr、Exl - Chl）。使用组内相关系数（ICC）、平均差异、标准差和布兰德 - 奥特曼相关性来比较所进行的测量。
检查者内和检查者间的可靠性极佳（ICC > 0.9）。总体而言，测量值的变化幅度较小，为2.0毫米。然而，只有三项测量值（Sn - Me、Exr - Exl和Exr - Chr）超出了临床可接受范围。
3D Cloner扫描仪显示出与数字卡尺相当的临床可接受准确性，变化范围为 -0.8 ± 1.2毫米。还观察到检查者间和检查者内数字测量的一致性。
具有准确三维模型再现且数字测量可靠的扫描仪可为口腔颌面治疗提供更精确的诊断和更好的治疗计划。
