Private Dental Practice, Heraklion, Crete, Greece.
Private Dental Practice, Chania, Crete, Greece.
Eur J Prosthodont Restor Dent. 2023 Aug 31;31(3):296-307. doi: 10.1922/EJPRD_2495Michelinakis12.
A mannequin head was digitized using a reference scanner (Scan in a Box) to acquire the reference mesh. Subsequently it was scanned with a structured light scanner (Einscan Pro HD), a stereophotogrammetry scanner (RayFace100) and a laser scanner (Proface 3D Mid) to acquire test meshes.Resulting meshes were delineated in four horizontal areas and discrepancies calculated for the complete face and different facial partitions. One-way Anova and pairwise comparisons tests were used to compare trueness and precision between scanners across different areas. Significant differences were detected among scanners for complete face (F (3, 27) =776, P ⟨ 0.01)) and for delineated face areas (F (11, 99) =200.1, P ⟨ 0.01)). Einscan had significantly higher accuracy for the complete face (P⟨0.01) and significantly higher trueness for each facial partition compared to other scanners. RayFace had significantly higher trueness when scanning the middle part of face compared to other facial parts. Proface had significantly lower upper facial third trueness compared to other facial parts. All scanners had accuracy levels below the 2.00mm threshold. Facial scanning accuracy was influenced per scanner used. Scanning trueness per device was influenced by location of surface area. All scanners had accuracy levels within the acceptable accuracy threshold.
使用参考扫描仪（Scan in a Box）对人头模型进行数字化处理，以获取参考网格。随后，使用结构光扫描仪（Einscan Pro HD）、立体摄影测量扫描仪（RayFace100）和激光扫描仪（Proface 3D Mid）对其进行扫描，以获取测试网格。将所得网格在四个水平区域中进行描绘，并计算整个面部和不同面部分区的差异。使用单向方差分析和两两比较检验来比较不同区域不同扫描仪之间的真实性和精度。在整个面部（F (3, 27) = 776，P ⟨ 0.01）和不同面部分区（F (11, 99) = 200.1，P ⟨ 0.01）方面，不同扫描仪之间存在显著差异。与其他扫描仪相比，Einscan 在整个面部（P ⟨ 0.01）和每个面部分区的准确性方面具有更高的精度，在整个面部（P ⟨ 0.01）和每个面部分区的真实性方面具有更高的准确性。与其他面部部分相比，RayFace 在扫描面部中间部分时具有更高的真实性。与其他面部部分相比，Proface 在上部面部三分之一的真实性方面较低。所有扫描仪的精度水平均低于 2.00mm 阈值。面部扫描精度受所用扫描仪的影响。每个设备的扫描精度受表面区域位置的影响。所有扫描仪的精度水平均在可接受的精度阈值内。
