orthodontics, faculty of dentistry, suez canal university. ismailia
Abstract
Introduction: Recently, there are many investigations in a trail to shift from the direct three- dimensional image to CBCT derived cephalometric image takes place. It is important to investigate whether it is possible to use a CBCT derived cephalometric image to direct three-dimensional image, by comparing the angle and linear measurements of soft tissue structures assessed from a midsagittal projection using 3D cone-beam computed tomography (CBCT) compared with those evaluated through derived lateral cephalometric imaging. Aim: to evaluate the dependability and reliability of soft tissue orthodontic measurements acquired from derived cone beam computed tomography (CBCT). Materials and Methods: Forty CBCT scans; from the archive of Oral Radiology department Suez Canal University, Ismailia, Egypt, were used. Landmark identification carried out using OnDemand3DApp < br />program (cybermed Inc., Seoul, Korea) imaging software. Ten linear ratios and five angles were measured three times. Independent T-test used in this study to analyze the distinctions between two imaging modalities (direct CBCT and derived images at a significant level of probability (P£0.05). Results: There were no statistically significant differences were found between the direct CBCT and the derived imaging types in all measurements assessed, with the exception of the upper lip in reference to the E-line, which demonstrated a highly significant result. Conclusion: The derived CBCT can be considered a reliable approach for creating a database of facial soft tissue and can be utilized as a substitute for traditional lateral cephalograms when the patient’s CBCT is already available, thereby minimizing the patient’s exposure to radiation.
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