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IP Indian Journal of Orthodontics and Dentofacial Research

The efficacy of twin block in increasing the mandibular length: A cephalometric study

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Author Details : Anil Dhingra*, RPS Bedi, Amit Jain

Volume : 4, Issue : 4, Year : 2018

Article Page : 190-195

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Introduction: Angle’s Class II Div 1 malocclusion is one of the most common malocclusions in orthodontics. In cases of Angle’s Class II Div 1 malocclusion with mandibular deficiency, myofunctional appliances are often used with the intent of stimulating mandibular growth. Twin block is one of the most popular myofunctional appliances.
Aim: The aim of this study was to find out “Does the length of mandible increase with Twin Block appliances” using cephalometric radiograph.
Materials and Methods: Cephalometric radiographs of 15 patients who had Class II Div I malocclusion, before and after treatment were examined. The mean changes after Twin Block were compared with pre-treatment parameters using independent‘t’ test.
Results: There were statistically significant differences in Pre and Post-treatment mandibular length. Patients treated with twin block appliance showed a mean increase of 4 mm in the mandibular length.
Conclusion: Twin Block is an effective myofunctional appliance which can be used to increase the effective mandibular length in patients with skeletal Class II Div I malocclusion.

Keywords: Functional appliance, Class II malocclusion, Twin block

Doi : 10.18231/2455-6785.2018.0037

How to cite : Dhingra A, Bedi R, Jain A, The efficacy of twin block in increasing the mandibular length: A cephalometric study. IP Indian J Orthod Dentofacial Res 2018;4(4):190-195

Copyright © 2018 by author(s) and IP Indian J Orthod Dentofacial Res. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (CC-BY-NC 4.0) (