Comparison of the Accuracy of Optical Impression Systems in Three Different Clinical Situations

Maria Doukantzi, Dr Med Dent/Philippe Mojon, Dent/Ana Todorovic, Dent/Najla Chebib, Dent/Bjarni Elvar Pjetursson, Prof Dent, PhD/Sabrina Maniewicz, Dent/Irena Sailer, Dent: Purpose: To investigate the differences in accuracy (ie, trueness and precision) of five different optical impression systems. Materials Methods: The following systems was tested: (1) CEREC Bluecam (BL); (2) Omnicam (OM); (3) PlanScan (PL); (4) True Definition Scanner (TD); (5) Trios 3 (TR). A standard plastic study model represented a patient with fully dentate maxilla. Three clinical situations were simulated: Patient 1 (P1): dentate; 2 (P2): anterior partial edentulism (two missing incisors); (P3): posterior (missing premolar molar). models scanned reference scanner (IScan D104i), digitized used as for all comparisons. Then, impressions made three scenarios (n = 10 per group). Results: In situation P1, TD group provided highest (median ± SD root mean square: 180.2 46.3 μm). P2, found (97.9 27.6 μm) TR (105 9.5 groups, P3, had (P < .05; 76.2 5.6 precision .05) situations, RMS values 76.7 26 μm 46.8 14.1 39.7 9.1 P3. Conclusion: Two (TR TD) superior to other tested most measurements. However, none clearly respect both precision.