Evaluation of Beta, Yen, and W Angle in Assessment of Anteroposterior Jaw Relationship in North Indian Population: A Cephalometric Study

Abstract

Aim and objective: To establish the mean value, standard deviation, and to determine statistically significant differences of Beta, Yen, and W angle for skeletal class I, skeletal class II, and skeletal class III malocclusion in North India population. Materials and methods: The study will be carried on 90 pretreatment lateral cephalograms randomly taken from records of the Department of Orthodontics and Dentofacial Orthopedics, Genesis Institute of Dental Sciences and Research, Ferozepur. All the cephalograms will be traced using a sharp 0.5 mm pencil on 0.003-inch acetate tracing paper using an X-ray viewer. Mean values of measurements such as ANB angle and Wits appraisal will be calculated and will be divided into 3 groups of 30 samples each. Then, Beta, Yen, and W angle will be measured for all three groups. The data will then be summarized and standard statistical methods will be applied. Results: Beta angle had a value of 31.23 ± 3.2.99° for skeletal class I group, 25.33 ± 2.64° for skeletal class II group, 40.03 ± 3 0.05° for skeletal class III group, YEN angle had a value of 122.57 ± 6.53 for skeletal class I group, 115.20 ± 2.49 for skeletal class II group, and 132.60 ± 3.56 for skeletal class III group, and W angle had a value of 54.90 ± 2.39 for skeletal class I group, 51.17 ± 3.21 for skeletal class II group, and 59.40 ± 1.95 for skeletal class III group. Conclusion: A significant difference was present between the mean value of Beta, Yen, and W angle for class I, class II, and class III malocclusion. Clinical significance: Beta, Yen, and W angle are new parameters to diagnose the skeletal relationship of both the arches and are important clinically in diagnosis and treatment planning of the patient for orthodontic