Cephalometric accuracy and reliability in the diagnosis of skeletal class III malocclusion in Angolans
Keywords:
Orthodontics, Malocclusion, CephalometryAbstract
Introduction: cephalometric diagnosis is an essential tool due to the analysis of dental malocclusions and skeletal divergences. Objective: to evaluate the accuracy and reliability
of five cephalometric parameters in the diagnosis of skeletal class III malocclusion in Angolans. Methods: a cross-sectional descriptive observational study was carried out on 30 lateral cephalograms of Angolan patients treated at the Orthodontic Clinic of the Meditex
Clinic between July 2021 and October 2022. The ANB angle, Wits evaluation, Beta angle, the angle W and the angle Yen. Validity, reliability, sensitivity, and positive predictive values were calculated. Results: it turned out that the Dahlberg error ranged from 0,576 to 0,890 and the correlation coefficient between classes found a high correlation between the two sets of readings. A strong correlation was found between the values of the ANB angle and the Wits evaluation (r= 0,899, P < 0,05), the Beta angle and the Wits evaluation (r = 0,822, P < 0,05), and the angle Yen and W (r= 0,876, P < 0,05); the ANB angle and the Beta angle showed the highest sensitivity (0,934), while the ANB angle showed the highest PPV (0,966). Conclusions: the combination of ANB angle and Wits assessment, Beta angle and Wits
assessment, and Yen angle and W angle are reliable indicators to accurately assess class III malocclusion in Angolan patients.
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