Accuracy and Reliability of Landmarks Identification Using Ultra Low Dose CBCT: An In-Vitro Study | ||||
| Al-Azhar Journal of Dentistry | ||||
| Volume 2023, Issue 1, January 2023 | ||||
| DOI: 10.58675/2974-4164.1478 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Nora Al Abbady1; Nouran Seifeldin2 | ||||
| 1Lecturer, Department of Radiology, Faculty of Dentistry, Cairo University, Cairo, Egypt | ||||
| 2Lecturer, Department of Orthodontics, Faculty of Dentistry, Cairo University, Cairo, Egypt. | ||||
| Abstract | ||||
| ABSTRACT Purpose: The aim of this study was to assess the accuracy of ultra-low dose (ULD) CBCT in orthodontic landmark identification compared with standard dose CBCT on reconstructed lateral and posteroanterior views. Materials and Methods: 10 dry human skulls were scanned twice; once with standard CBCT standard radiation dose, and with ULD CBCT protocol operated at 90 kVp, 7.1 mA, 4.5 sec and 400µm voxel size. From each scan, a lateral and a posteroanterior cephalogram were reconstructed, and 33 landmarks were identified on them by 2 experts. All measurements were then repeated after 2 weeks for intra-observer reliability. Results: There was no statistically significant difference in landmarks identification between ULD and standard dose CBCT. The mean difference between both groups ranged between -0.12 to 0.51 in lateral view and -0.67 to 0.46 in posteroanterior view with excellent inter and intra observer agreement with an ICC value >0.7. Conclusion: Ultra-low dose CBCT with reconstructed lateral and posteroanterior views may be recommended for regular orthodontic diagnostic measurements and can replace the standard dose CBCT | ||||
| Keywords | ||||
| cone beam CT; Standard dose; Landmark Identification; Reliability; Ultra-low Dose | ||||
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