Original Article
Year : 2017 | Volume : 1 | Issue : 1 | Page : 4 - 12
Assessment of Tip, Torque, and Tooth Size Discrepancies in Angle’s Class II Division 2 Malocclusion
Sunny Jain, Jyothi Kiran H 1, Neha K 2, Debarshi Bhattacharjee 2, Subhrajit Rana 2, Abhishek Singh Nayyar 3
Department of Orthodontics and Dento-facial Orthopedics, Parbhani, Maharashtra,1 Department of Orthodontics and Dento-facial Orthopedics, JSS Dental College and Hospital, Mysore, Karnataka, 2 Department of Orthodontics and Dento-facial Orthopedics, Awadh Dental College and Hospital, Jamshedpur, Jharkhand, 3 Oral Medicine and Radiology, Saraswati- Dhanwantari Dental College and Hospital and Post- Graduate Research Institute, Parbhani, Maharashtra, India
Address for correspondence:
Dr. Abhishek Singh Nayyar,
E‐mail: singhabhishek.rims@gmail.com
Abstract
Context:
Since the introduction of preadjusted edgewise appliances, they are being extensively used all over the world including India. There is a need to establish the tip and torque values for Angle’s Class II Division 2 patients to find whether they are comparable or, in variance with those established by Andrews which forms the basis of the orthodontic treatment with most of the most preadjusted edgewise appliance systems. The present study was carried out to study tip, torque, and tooth size discrepancies in patients exhibiting Angle’s Class II Division 2 malocclusion with no previous history of orthodontic treatment.
Materials and Methods:
Thirty patients were selected from the outpatient department who were diagnosed as having Angle’s Class II Division 2 malocclusion. Alginate impressions of all the thirty patients were made for both maxillary and mandibular arches, and the study models prepared and crown angulation/tip, crown inclination/torque, and tooth size discrepancies using Bolton’s analysis were measured.
Results:
The upper incisor torque obtained in the present study was considerably lower than all the other studies compared. The torque value of the second mandibular molar obtained in the present study differed from all the previous studies in being much higher and following the progressively increasing negative inclination seen in all other studies from canine to second molar. The lower incisors in the present study were found to be more upright than all other studies with a higher negative torque. The other studies either showed positive torque for central incisors or mild negative torque for both lower incisors.
Conclusion:
The results of the present study showed some similarities with that of the Andrew’s and other studies in the overall pattern of tip and torque values, for example, the positive tip of all maxillary teeth except second molars. The torque values showed a pattern of positive torque for maxillary lateral incisors while negative torque for all the other teeth. However, the values for individual teeth showed many variations.
Keywords: Angle’s Class II Division 2 malocclusion, tip, tooth size discrepancies, torque
Financial support and sponsorship
Nil.
Conflicts of interest
There are no conflicts of interest.
How to cite this article:
Jain S, Kiran HJ, Neha K, Bhattacharjee D, Rana S, Nayyar AS. Assessment of tip, torque, and tooth size discrepancies in Angle's class II division 2 malocclusion. Int J Orofac Biol 2017;1:4-12.
