Journal of Research and Advancement in Dentistry
Official publication of Magadh University and Kolhan University, Government of Bihar and Jharkhand, India
Official publication of Magadh University and Kolhan University, Government of Bihar and Jharkhand, India
Year : 2017
Volume : Volume 7
Issue : Issue 1
Address for correspondence :
Dr. Prathapan Parayaruthottam
prathapan.ortho@gmail.com
Aim: The aim was to evaluate the dentofacial changes during and following treatment in Class I bimaxillary dento-alveolar protrusion cases treated with four bicuspid extraction and Begg light wire appliance. Materials and Methods: The data for the study was obtained from lateral cephalograms of ten female patients taken before treatment, at the end of active treatment and six months to one year in retention. Angular and linear measurements were subjected to statistical evaluation to find out whether the changes in the dentofacial complex were significant or not and to determine the stability of the results. Results: Overbite corrected during treatment generally tended to partially relapse in the post-treatment period. Significant changes were obtained for overjet, U1-palatal plane, Point A, L1-mandibular plane and inter-incisal angle during treatment and they were relatively stable in the post-treatment retention period. The occlusal plane to SN and Y-axis angle increased during treatment. This tended to revert to the pre-treatment value during the post-treatment period. The U1-SN was significantly reduced during the treatment period, but the post-treatment period showed a slight proclination of the maxillary incisors. The incisor mandibular plane angle was significantly reduced during the treatment period. There was a slight increase in retroclination in the posttreatment period. Conclusion: In the present study, judicious use of mechanics and orthodontic forces gave good clinical results. Some parameters like overbite, occlusal plane-SN, Y-axis, U1-SN and IMPA showed some changes in the retention period. This has to be kept in mind prior to debonding the patient. Further studies with a larger sample size to assess the dento-skeletal and soft tissue changes during the retention period would be useful so that the nature and extent of changes could be standardized for the Kerala population.
Keywords: Bimaxillary dento-alveolar protrusion, cephalometric appraisal, post-treatment relapse.
