Impact of different scan strategies and implant angulation on impression accuracy of full arch multiple implant: an in vitro study

Objective: to evaluate the impact of three different scan strategies and implant angulation on impression accuracyof an intraoral scanner for full-arch multiple scan. Material Method: A maxillary edentulous modelwith six analogs served as a reference model. The four anterior were positioned parallel toeach other, distal right left was placed with 15o 20o, respectively. Thirtyimpression performed using (CEREC Primescan). master cast digitalized withan industrial (ATOS Core 80). All scans converted standard tessellation language (STL),superimposed 3d inspection software (GOM Inspect Professional 2019) thenanalyzed. Results: linear distances presented equivalence [p<0.01] those found forall strategies. tendency negative means except d4in strategy C. angular did not present [p=0.05] scan.Significant 3D deviations [p<0.05] between B (0.02 ± 0.01) C (0.05 0.04) d1.In all others no statistically significant difference A,B Conclusions: There A, ford1 in C; Implant affect accuracy CEREC Primescan IOS.KEYWORDSPrecision; Trueness; Edentulous jaw; Dental implant; technique.