Comparison of Crown Root Morphology in Maxillary and Mandibular Anterior Teeth of Different Sagittal Skeletal Patterns in Bengali Population: A Retrospective CBCT Study

Introduction: Individual diversity is the cornerstone of human biology and this is also reflected in the crown and root morphology of teeth. The maxillary and mandibular anterior teeth can be differentiated based on their crown-root morphology, collum angle, Labial Surface Angle (LSA) and torque angle. In clinical orthodontic practice, the collum angle is often assumed to be zero, as seen in standardised cephalometric incisor tracing templates. This assumption overlooks the variations in collum angles observed in different malocclusions, leading to difficulties in achieving proper root angulation after treatment. Aim: To evaluate and correlate the collum angle, LSA and torque angle in maxillary and mandibular anterior teeth across different skeletal patterns in the Bengali population. Materials and Methods: This retrospective study was conducted at the Department of Orthodontics and Dentofacial Orthopaedics , Guru Nanak Institute of Dental Sciences and Research, Kolkata, West Bengal, India, from March 2022 to January 2024. It involved 90 Cone-Beam Computed Tomography (CBCT) scans of young adult patients aged 18–24 years, with no history of orthodontic treatment, cleft lip and palate, or oral habits. Participants were divided into three groups based on the angle between Point A, Point B and Nasion (ANB angle): skeletal Class-I (2° 4°) and Class-III (ANB