A Comparative Evaluation of Tooth Size Discrepancies in Different Types of Malocclusions by using Bolton\'s Analysis: An Odontometric Study

Abstract

Patients attending orthodontic clinics normally complain of crowding or spacing or both, which represents big esthetic and functional problems. The link between the upper and lower teeth sizes and its repercussions on the occlusal harmony of these dental arches is a cause of major concern in orthodontic treatment. Hence, this study is carried out to compare the anterior and overall ratios of tooth sizes in different types of Angle's malocclusions. For this study, we examined and selected 100 patients from the Department of Orthodontics and Dentofacial Orthopedics, Aditya Dental College, Beed, Maharashtra, India and divided into 4 malocclusion groups namely Angle's class I (n = 25), Angle's class II (n = 50) [class II division 1 (n = 25), class II division 2 (n = 25)], Angle's class III (n = 25). For all selected patients the impressions were taken, casts were poured and models were prepared. Then the greatest width of the teeth from the first molar to the contralateral first molar was measured by using a caliper on the study models. The anterior and overall ratios between the maxillary and mandibular teeth were evaluated by using Bolton’s analysis. All the parameters were subjected to statistical analysis.