Prosthodontic application of intraoral scanning systems
Vitai Viktória
Dental Research Division
Dr. Varga Gábor
BC22 Irodaház Marcus Aurelius terem
2025-04-23 15:30:00
Dental Research
Dr. Varga Gábor
Dr. Borbély Judit
Dr. Stjepan Spalj
Dr. Oleh Andrukhov
Dr. Vág János
Dr. Reinhilde Jacobs
Dr. Victor-Vlad Costan
In the prosthodontic application of intraoral scanners (IOS), their accuracy and additional features, such as shade determination, are crucial.
Two meta-analyses (MAs) were conducted to compare the complete-arch scanning accuracy of different IOSs to that of reference Standard Tesselation Language (STL) files and the accuracy of IOSs tooth shade determination to that of reference spectrophotometers (SPs) in determining tooth shade.
For Study I, in vivo and in vitro diagnostic test accuracy studies were included. A network meta-analysis (NMA) was performed to define the scanning accuracy for four arch subgroups using four outcomes (trueness and precision expressed as mean absolute deviation and root mean square values). The accuracy of IOS scans was similar to the reference scans for dentate arches (three IOSs), edentulous arches (three IOSs), and completely edentulous arches with implants (one IOS). The accuracy of the IOSs was significantly different from the reference scans for partially edentulous arches with implants. Significant accuracy differences were found between the IOSs, regardless of clinical scenarios.
For Study II, quasi-experimental studies were included. Quantitative analysis was performed to determine the accuracy of the IOS in subgroups using four outcomes: trueness and precision in 3D Master (3D) and Vita Classical (VC) shade guide system coding with different measurement locations. The shade determination trueness with IOS was 0.28 (CI: 0.09– 0.60) in VC and 0.38 (CI: 0.24– 0.53) in 3D shade guide codes. Repeatability was 0.81 (CI: 0.64– 0.91) in VC and 0.85 (CI: 0.74– 0.92) in 3D shade guide codes. Significant differences were found between the IOSs and SPs shade determination.
Study I found that the accuracy of complete-arch scanning by IOSs differed based on clinical scenarios.
In Study II, the accuracy of shade matching with IOSs was lower than that of SPs, though the precision is high and comparable to that of SPs.
