A comparative analysis of angular cephalometric values between CBCT generated lateral cephalographs versus digitized conventional lateral cephalographs

Objectives. (1) To determine precision of angular measurements in both the 2D and 3D imaging systems, and to (2) to ascertain the difference in cephalometric values between traditional and CBCT generated cephalographs.;Results. High inter-rater reproducibility (ICC>0.8) with all angles was demonstrated in both imaging modalities. Only SN-FH (Conventional 95% CI: 0.584-0.965; CBCT 95% CI: 0.584-0.950) demonstrated significant difference between raters. No significant difference in the angular measurements was detected between the two image modalities (p>0.1 for all measurements, alpha=0.05).;Conclusions. A lateral, full thickness x-ray construction from CBCT imaging (NewTom 3G) can be used to perform traditional cephalometric analysis with comparable levels of precision and accuracy.;Methods. Traditional cephalograms (Orthoceph OC100) and volumetric CBCT imaging (Newtom 3G) were performed on 36 patients from the incoming pool of treatable cases at the University of Alberta Graduate Orthodontic Clinic, Edmonton. Lateral cephalometric analysis using Dolphin 3D was performed and ten angular measurements were evaluated. Inter-rater and Intra-rater reliability was assessed using inter-rater correlation coefficient (ICC). Paired MANOVA was used to compare differences in measurements between the two image modalities.