Evaluation of Angulation between Labial & Lingual Surfaces of Crown of Anterior teeth & 3D Mapping Lingual Surface for Development of Concept of New Preadjusted Lingual Bracket

Abstract

Introduction: The present work focuses on digital analysis and evaluation of angulation between labial & lingual surfaces of the crown of each anterior tooth and lingual curvature for the development of a pre-adjusted lingual bracket system.

Material & Methods: The sample consisted of 100 dental casts (maxillary & mandible) and 100 CBCT scans made at Santosh Dental College, Ghaziabad which were selected on the basis of Angle’s Class I molar relationship without any crowding, rotation, attrition, abrasion, erosion, abfraction & anomaly on any tooth with the patient age group between 16 years to 20 years. CBCT scans were taken by KODAK 9500 Cone Beam 3D System (Carestream Health, Inc. 150 Verona Street Rochester NY 14 608) at Institute of Lingual Orthodontics, Centre for Advanced Dental Care, Indirapuram. The samples were evaluated for 3D Surface Topography, Labio-lingual angle and Lingual Curvature.

Canine 

 

Landmarks  

 

Canine 

 

Landmarks  

 

Results: This study's confirmation of digital dental analysis enables for the assessment of tip and torque, which might be used to better comprehend the subtleties of various bracket prescriptions. A broad range of incisor and canine shapes, forms, and sizes were observed. There was a greater than 24-degree difference in incisor and a greater than 28-degree difference in canine CRA values. A total of eight different types of lingual curvatures were established that included four lingual curvatures for maxillary central incisor, two for maxillary lateral incisor and two for maxillary canine respectively.

Conclusion: In the present study by the use of digital analysis, we were able to establish eight distinct lingual curvatures namely four for maxillary centrals, two for maxillary laterals and two for the maxillary canine.