Reliability of Orthopantomogram in Determination of Gonial Angle
DOI:
https://doi.org/10.61919/jhrr.v4i1.1738Keywords:
Gonial Angle, Orthopantomogram, Lateral Cephalogram, Mandibular Rotation, Vertical Facial Growth Patterns, Cephalometric Analysis.Abstract
Background: The gonial angle is a key cephalometric parameter used to assess vertical facial growth patterns. Although lateral cephalograms are the gold standard for its measurement, orthopantomograms (OPGs) are increasingly being used as an alternative diagnostic tool due to their accessibility and lower radiation exposure.
Objective: This study aimed to evaluate the reliability of gonial angle measurements obtained from OPGs by comparing them with those derived from lateral cephalograms.
Methods: A cross-sectional study was conducted on 200 patients (70 males, 130 females; mean age: 19.93 ± 6.643 years) at Bolan Medical College/Hospital, Quetta. Pretreatment lateral cephalograms and OPGs were obtained using a Kodak 9000 C machine. The gonial angle was measured by manual tracing of a tangent along the lower border of the mandible and another along the posterior ramus. Measurements were performed independently by two operators. Statistical analyses, including Pearson correlation, ANOVA, and paired t-tests, were performed using SPSS version 25.
Results: The mean gonial angle measured on OPGs was 124.62° ± 7.54° (right side) and 124.31° ± 8.37° (left side), compared to 124.65° ± 7.99° on lateral cephalograms. Strong correlations were observed between OPG and cephalometric measurements (r = 0.894–0.898, p < 0.01). ANOVA indicated no significant differences between the methods (p > 0.05).
Conclusion: OPGs demonstrated high reliability for gonial angle measurement, making them a viable alternative to lateral cephalograms for assessing vertical facial patterns in orthodontics. management.
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References
Christensen JR, Fields H, Sheats RD. Treatment Planning and Management of Orthodontic Problems. In: Pediatric Dentistry. Elsevier; 2019. p. 512-553.
Kumar SS, Thailavathy V, Srinivasan D, Loganathan D, Yamini J. Comparison of Orthopantomogram and Lateral Cephalogram for Mandibular Measurements. J Pharm Bioallied Sci. 2017;9(Suppl 1):S92.
Zhu Y, Zheng F, Gong Y, Zhu J, Yin D, Liu Y. Effect of Occlusal Contact on TMJ Loading During Occlusion: An In Silico Study. Comput Biol Med. 2024;154:108725.
Nickel JC, Iwasaki LR, Gonzalez YM, Gallo LM, Yao H. Mechanobehavior and Ontogenesis of the Temporomandibular Joint. J Dent Res. 2018;97(11):1185-92.
de Senna BR, dos Santos Silva VK, França JP, Marques LS, Pereira LJ. Imaging Diagnosis of the Temporomandibular Joint: Critical Review of Indications and New Perspectives. Oral Radiol. 2009;25:86-98.
Zhou J, Yang H, Li Q, Li W, Liu Y. Comparison of Temporomandibular Joints in Relation to Ages and Vertical Facial Types in Skeletal Class II Female Patients: A Multiple-Cross-Sectional Study. BMC Oral Health. 2024;24(1):467.
Stošić S. Mandibular Reconstruction: State of the Art and Perspectives. Vojnosanit Pregl. 2008;65(5):397-403.
Carlson DS, Buschang PH. Craniofacial Growth and Development: Evidence-Based Perspectives. In: Orthodontics: Current Principles and Techniques. 5th ed. Mosby; 2011. p. 215-46.
Domenyuk D, Kochkonyan T, Shkarin V, Dmitrienko S, Domenyuk S. X-Ray Cephalometric Features of Nasal and Gnathic Sections in Different Facial Skeleton Growth Types. Group. 2022;119:123.
Radhakrishnan PD, Varma NK, Ajith VV. Dilemma of Gonial Angle Measurement: Panoramic Radiograph or Lateral Cephalogram. Imaging Sci Dent. 2017;47(2):93-7.
Nadkerny PV, Kumar DA, Nadkerny VD. Assessing Reliability of Mandibular Planes in Determining Gonial Angle on Lateral Cephalogram and Panoramic Radiograph. J Orthod Res. 2015;3(1):45.
Smołka P, Nelke K, Struzik N, Wiśniewska K, Kiryk S, Kensy J, et al. Discrepancies in Cephalometric Analysis Results Between Orthodontists, Radiologists, and Artificial Intelligence: A Systematic Review. Appl Sci. 2024;14(12):4972.
Singh NP, Panda S, Kharlyngdoh D, Pal MK, Bhat BA, Sawhny KS. Comparison of Orthopantomogram and Lateral Cephalogram for Mandibular Measurements. J Pharm Negative Results. 2022;13:3623-32.
Srivastava A, Raghav P, Pradhan S. Effectiveness of Orthopantomograph in Vertical Mandibular Measurements: A Systematic Review. J Oral Maxillofac Radiol. 2021;9(2):45-51.
Lindner C, Wang CW, Huang CT, Li CH, Chang SW, Cootes TF. Fully Automatic System for Accurate Localization and Analysis of Cephalometric Landmarks in Lateral Cephalograms. Sci Rep. 2016;6:33581.
Ludlow JB, Laster WS, See M, Bailey LT, Hershey HG. Accuracy of Measurements of Mandibular Anatomy in Cone Beam Computed Tomography Images. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2007;103(4):534-42.
Gao S, Yang K, Shi H, Wang K, Bai J. Review on Panoramic Imaging and Its Applications in Scene Understanding. IEEE Trans Instrum Meas. 2022;71:1-34.
Lauc T. 3D Diagnostics in Orofacial Region. Rad Hrvatske Akad Znan Umjetnosti Med Znan. 2012;22(514=38):127-51.
Silvestrini-Biavati F, Ugolini A, Laffi N, Canevello C, Silvestrini-Biavati A. Early Diagnostic Evaluation of Mandibular Symmetry Using Orthopantomogram. Indian J Dent Res. 2014;25(2):154-9.
Van Elslande DC, Russett SJ, Major PW, Flores-Mir C. Mandibular Asymmetry Diagnosis With Panoramic Imaging. Am J Orthod Dentofacial Orthop. 2008;134(2):183-92.
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Copyright (c) 2024 Marium Hasni, Nasrullah Mengal, Bibi Masooma, Maria Zehri, Mehreen Butt, Fakhira Nizam, Masooma Hameed, Zeenat Razzaq, Sumbhal Hayat, Aminullah, Irfan, Munir Ahmed
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