Department of Prosthodontics, Istanbul Okan University Faculty of Dentistry, Istanbul, Turkey.
Division of Postdoctoral and Research, National Autonomous University of Mexico, Mexico City, Mexico.
Clin Implant Dent Relat Res. 2020 Aug;22(4):533-541. doi: 10.1111/cid.12919. Epub 2020 Jul 8.
How the accuracy of complete-arch implant scans is affected when different intraoral scanners (IOSs) are used and the effect of scan body position on the accuracy are not well-known.
To compare the scan accuracy (trueness and precision) of a recently introduced IOS (Virtuo Vivo) to a commonly used IOS (TRIOS 3) and the scans of a laboratory scanner (LBS; Cares 7 SERIES) in a completely edentulous maxilla with four implants. It was also aimed to evaluate the effect of scan body position on the accuracy.
Multi-unit scan bodies were tightened on a poly(methyl methacrylate) edentulous maxillary model with four implants. A master reference model (MRM) stereolithography (STL) file was generated by scanning the model with a high-precision scanner. The model was scanned with three different scanners (n = 10); two different IOSs and a LBS. STL files were superimposed over the MRM.
For trueness, scan body position (P = .004) and scanner type (P < .001) had a significant effect on distance deviation and a significant interaction was found (P = .001). For angular deviation, only scanner type had a significant effect (P = .028). For precision, significant difference was found for distance (P = .011) and angular deviations (P = .020) between different scanner types.
One scanner type was not superior to others when both trueness and precision were considered. Position of the scan body affected the distance deviation (trueness).
当使用不同的口内扫描仪（IOS）时，完整牙弓种植体扫描的准确性会受到怎样的影响，以及扫描体的位置对准确性的影响尚不清楚。
比较一种新引入的 IOS（Virtuo Vivo）与一种常用 IOS（TRIOS 3）以及一种实验室扫描仪（LBS；Cares 7 SERIES）在完全无牙上颌四个种植体中的扫描准确性（准确性和精密度）。还旨在评估扫描体位置对准确性的影响。
将多单位扫描体拧紧在一个带有四个种植体的聚甲基丙烯酸甲酯无牙上颌模型上。通过使用高精度扫描仪扫描模型生成主参考模型（MRM）立体光刻（STL）文件。使用三种不同的扫描仪（n = 10）对模型进行扫描；两种不同的 IOS 和一种 LBS。将 STL 文件叠加在 MRM 上。
在准确性方面，扫描体位置（P =.004）和扫描仪类型（P < .001）对距离偏差有显著影响，并且发现存在显著的交互作用（P =.001）。对于角度偏差，只有扫描仪类型有显著影响（P =.028）。在精密度方面，不同扫描仪类型之间的距离（P =.011）和角度偏差（P =.020）存在显著差异。
当考虑准确性和精密度时，没有一种扫描仪类型优于其他类型。扫描体的位置会影响距离偏差（准确性）。
