Cephalometric Measurements on Conventional Posteroanterior Radiographs versus CBCT Images: A Comparative Study
Journal of Dental School, Shahid Beheshti University of Medical Sciences,
Vol. 38 No. 3 (2020),
12 October 2021
,
Page 93-96
https://doi.org/10.22037/jds.v38i3.29907
Abstract
Objectives Facial asymmetry in orthodontic treatments can be evaluated by both posteroanterior (PA) cephalograms and cone-beam computed tomography (CBCT) images. This study aimed to assess the agreement between CBCT and two-dimensional PA images in terms of cephalometric measurements.
Methods In this descriptive analytical study, CBCT and PA radiographs were taken from nine human dry skulls. Two observers marked the bilateral landmarks including CO (orbit center), J (jugale), 6C, 6A, 1A, 1C, GO (gonial angle), AG (antegonion), AR (articular) and Ma (mastoidal). The distance between two identical points on both sides was measured on both the PA and CBCT images. The differences were calculated and the agreement between the two modalities was checked by using intraclass correlation coefficient (ICC).
Results The mean differences between CBCT and PA measurements were as following: for CO=1.48, J=11.64, U6C=0.75, U6A=1.8, L6C=13.33, L6A=3.0, U1C=0.96, U1A=0.62, L1C=0.22, L1A=0.45, GO=0.87, AG=6.67 and AR=0.71 mm. The agreement was the highest for GO (ICC=0.931) and CO (ICC=0.902), and the lowest for U6A (ICC=-0.041) and J (ICC=0.038) landmarks.
Conclusion Given the negligible differences between the two modalities, conventional PA cephalograms can be as competent as CBCT in detecting maxillofacial asymmetry with lower patient radiation dose.
- Cephalometry;
- Cone-Beam Computed Tomography;
- Facial Asymmetry
How to Cite
References
Bajaj K, Rathee P, Jain P, Panwar VR. Comparison of the reliability of anatomic landmarks based on PA cephalometric radiographs and 3D CT scans in patients with facial asymmetry. Int J Clin Pediatr Dent 2011;4:213-23.
Kokich VG. Cone-beam computed tomography: have we identified the orthodontic benefits? Am J Orthod Dentofacial Orthop 2010;137:S16.
Hassan B, van der Stelt P, Sanderink G. Accuracy of three-dimensional measurements obtained from cone beam computed tomography surface-rendered images for cephalometric analysis: influence of patient scanning position. Eur J Orthod 2009;31:129-34.
Hwang H-S, Hwang CH, Lee K-H, Kang B-C. Maxillofacial 3-dimensional image analysis for the diagnosis of facial asymmetry. Am J Orthod Dentofacial Orthop 2006;130:779-85.
Moss J, McCance A, Fright W, Linney A, James D. A three-dimensional soft tissue analysis of fifteen patients with Class II, Division 1 malocclusions after bimaxillary surgery. Am J Orthod Dentofacial Orthop 1994;105:430-7.
Vanezis P, Blowes R, Linney A, Tan A, Richards R, Neave R. Application of 3-D computer graphics for facial reconstruction and comparison with sculpting techniques. Forensic Sci Int 1989;42:69-84.
Brown AA, Scarfe WC, Scheetz JP, Silveira AM, Farman AG. Linear accuracy of cone beam CT derived 3D images. Angle orthod 2009;79:150-7.
Hilgers ML, Scarfe WC, Scheetz JP, Farman AG. Accuracy of linear temporomandibular joint measurements with cone beam computed tomography and digital cephalometric radiography. Am J Orthod Dentofacial Orthop 2005;128:803-11.
Kumar V, Ludlow J, Soares Cevidanes LH, Mol A. In vivo comparison of conventional and cone beam CT synthesized cephalograms. Angle Orthod 2008;78:873-9.
Miner RM, Al Qabandi S, Rigali PH, Will LA. Cone-beam computed tomography transverse analyses. Part 2: Measures of performance. Am J Orthod Dentofacial Orthop 2015;148:253-63.
Bhambhani R, Bhattacharya J, Sen SK. Digitization and its futuristic approach in prosthodontics. J Indian Prosthodont Soc 2013;13:165-74.
Chen YJ, Chen SK, Chang HF, Chen KC. Comparison of landmark identification in traditional versus computer-aided digital cephalometry. Angle Orthod 2000;70:387-92.
McClure SR, Sadowsky PL, Ferreira A, Jacobson A, editors. Reliability of digital versus conventional cephalometric radiology: a comparative evaluation of landmark identification error. Semin Orthod; 2005: Elsevier.
Mehdizadeh M, Faghihian E. Comparison of linear measurement accuracy on cone-beam computed tomography images and digital lateral cephalometric radiographs. Journal of Isfahan Dental School 2013;8:567-75.
Fuyamada M, Shibata M, Nawa H, Yoshida K, Kise Y, Katsumata A, et al. Reproducibility of maxillofacial landmark identification on three-dimensional cone-beam computed tomography images of patients with mandibular prognathism: comparative study of a tentative method and traditional cephalometric analysis. Angle Orthod 2014;84:966-73.
Damstra J, Fourie Z, Ren Y. Comparison between two-dimensional and midsagittal three-dimensional cephalometric measurements of dry human skulls. Br J Oral Maxillofac Surg 2011;49:392-5.
Yitschaky O, Redlich M, Abed Y, Faerman M, Casap N, Hiller N. Comparison of common hard tissue cephalometric measurements between computed tomography 3D reconstruction and conventional 2D cephalometric images. Angle Orthod 2011;81:11-6.
Kumar V, Ludlow J, Mol A, Cevidanes L. Comparison of conventional and cone beam CT synthesized cephalograms. Dentomaxillofac Radiol 2007;36:263-9.
Moshiri M, Scarfe WC, Hilgers ML, Scheetz JP, Silveira AM, Farman AG. Accuracy of linear measurements from imaging plate and lateral cephalometric images derived from cone-beam computed tomography. Am J Orthod Dentofacial Orthop 2007;132:550-60.
Berco M, Rigali Jr PH, Miner RM, DeLuca S, Anderson NK, Will LA. Accuracy and reliability of linear cephalometric measurements from cone-beam computed tomography scans of a dry human skull. Am J Orthod Dentofacial Orthop 2009;136:17.e1-9.
Thilander B, Persson M, Adolfsson U. Roentgen–cephalometric standards for a Swedish population. A longitudinal study between the ages of 5 and 31 years. Eur J Orthod 2005;27:370-89.
de Moraes MEL, Hollender LG, Chen CS, Moraes LC, Balducci I. Evaluating craniofacial asymmetry with digital cephalometric images and cone-beam computed tomography. Am J Orthod Dentofacial Orthop 2011;139:e523-31.
Kim M-Y, Lee K-M, Cho J-H, Hwang H-S. Correction of positional change of frontal cephalometric landmarks caused by vertical head rotation. Korean J Orthod 2011;41:98-111.
Lee HJ, Lee S, Lee EJ, Song IJ, Kang B-C, Lee J-S, et al. A comparative study of the deviation of the menton on posteroanterior cephalograms and three-dimensional computed tomography. Imaging Sci Dent 2016;46:33-8.
Ludlow JB, Davies-Ludlow L, Brooks S, Howerton W. Dosimetry of 3 CBCT devices for oral and maxillofacial radiology: CB Mercuray, NewTom 3G and i-CAT. Dentomaxillofac Radiol 2006;35:219-26.
- Abstract Viewed: 87 times
- PDF Downloaded: 93 times