Assessment of Reliability and Identification of Craniofacial Landmarks in CBCT Generated 2D Cephalograms Compared to Digital Cephalograms.

Introduction: Lateral cephalograms are widely used in Orthodontics as a vital tool for treatment planning in orthodontics. The reliability of cephalometric analyses depends on projection and identification errors. Aim: Comparative assessment of reliability and identification of Craniofacial landmarks on CBCT-synthesised cephalograms vs conventional cephalograms, and to check whether the technique used to synthesize CBCT cephalograms has an impact on the reproducibility of the cephalometric measurements. Materials and Methods: This was a Cross sectional retrospective study was conducted in the Department of Orthodontics and Dentofacial Orthodontics, Guru Nanak Institute of Dental Sciences and Research for six months period of time, where 50 (25 Cone beam computed tomography generated cephalograms and 25 Conventional digital cephalograms) were selected and parameters were studied using Steiners analysis. Seven Linear and nine angular measurements were done. The linear and angular measurement required for different analysis were determined for cephalometric analysis software named Nemoceph (updated version 7). Results: The values of the two imaging modalities does not show any statistically significant difference. Correlation coefficient/r-value shows that both Digital cephalograms and CBCT cephalograms are highly reliable. Conclusion: So, the authors can conclude that both conventional digital lateral cephalogram and CBCT generated cephalogram can be readily used for craniofacial landmarks identification. [ABSTRACT FROM AUTHOR]