The aim of this study was to compare lineal and angular measurement of Ricketts and Steiner analysis in cephalometric radiographs 2D and 3D. Materials and Methods: 30 cephalometric 2D and 3D radiographs were used , on which Ricketts and Steiner analysis were performed and the results from both tests were analyzed and compared. Results: After statistical analysis, the results of the difference between 2D and 3D radiographs, showed in the analysis of Ricketts 1.2% in Overjet, 1.28% Overbite, 2.12% Extrusion of the lower incisor, 14.5% Interincisal Angle, 1.75%Facial Convexity, 6.79% upper molar position, 1.2% Proinclination of lower incisor, 1.6% Proinclination of upper incisor, 7.21% Inclination of lower incisor, 7.2% Inclination of upper incisor, 2.9% Labial protrusion, 3.4% Facial Depth, 7.8% en Maxillary Depth, 10.9% Facial Axis, 3.07% Inclination of palatal plane, 6.3%Craneal Deflection, 8.9%Anterior Cranial Length, 14.19 Mandibular Length, 16.15% Mandibular Arch. In Steiner 2.73%SNA, 2.48% SNB , 1.2% ANB
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