Abstract :
Introduction: In the field of Orthodontics and Dentofacial Orthopedics, in-depth knowledge of mandibular morphology and different types of growth pattern is essential to reach to ideal treatment for every patient.
Objectives: To compare antegonial notch depth, symphysis morphology and ramus morphology among different growth patterns. 2) To correlate antegonial notch depth with other parameters of mandibular morphology.
Materials and Methods: In this study, lateral cephalogram of total 90 patients were traced. The sample was divided into horizontal, average and vertical growth pattern based on Jarabak’s ratio. The antegonial notch depth, symphysis morphology (i.e. its height, depth, ratio and angle) and ramus morphology (its height and width) were evaluated and analysed statistically. The symphysis ratio is the ratio of symphysis height to symphysis width.
Results: This study revealed that antegonial notch depth, symphysis angle and ramus height shows statistically significant difference among different growth patterns. In vertical growth pattern, antegonial notch depth is positively correlated with symphysis height, symphysis depth, ramus height and ramus width whereas it is negatively correlated with symphysis ratio and symphysis angle and exactly opposite is true for horizontal growing individuals.
Conclusion: This study concluded that there is correlation between mandibular morphology and growth pattern of an individual.
Keyword :
Mandibular morphology, Growth patterns, Antegonial notch depth, Symphysis morphology, Ramus morphology