Author :
Manu Parashar, Sukhbir Singh Chopra, Manu Krishnan, Dinesh Chander Chaudhary, Vivek Kumar Thakur, Surendra Kumar Sewda, Dhruv Jain, Balakrishnan Jayan, Manu Parashar, Sukhbir Singh Chopra, Manu Krishnan, Dinesh Chander Chaudhary, Vivek Kumar Thakur, Surendra Kumar Sewda, Dhruv Jain, Balakrishnan Jayan, Manu Parashar, Sukhbir Singh Chopra, Manu Krishnan, Dinesh Chander Chaudhary, Vivek Kumar Thakur, Surendra Kumar Sewda, Dhruv Jain, Balakrishnan Jayan
Volume :
9
Issue :
4
Abstract :
AbstractAim: To evaluate skeletal and dental changes in Class II div 2 malocclusion cases treated with passive self-ligating (SLB) and conventional Preadjusted Edgewise Appliance (PEA) after levelling and alignment stage.Materials and Methods: A total of 20 cases of Angle Class II div 2 malocclusion selected for study (9 male, 11 female) were divided into two groups, treated with passive SLB (mean age 16.05 0.91 years) and conventional Preadjusted Edgewise Appliance (PEA) (mean age 16.51 1.61 years). Pre-treatment and post levelling alignment study models, lateral cephalograms were taken. Pre and post intervention records were analysed for selected skeletal, dental, soft tissue and study model parameters. Intergroup and Intragroup variations were assessed for statistically significant differences. Non parametric tests (Wilcoxon-Mann-Whitney U test) were used to make group comparison.Results: Amongst the selected skeletal parameters, statistically significant increase in maxillomandibular differential (McNamara) was found in SLB group (0.60 0.7) compared to PEA group. Rest all other parameters had no statistically significant changes. Significant increase in UI – NA (Steiner’s), UI-SN, UI-palatal plane, and increased change in interincisal angle was found in PEA group compared to SLB group. There were significant changes in inter premolar width over time and premolar inclination in SLB group. Change in molar inclination, intermolar width, intercanine width was non-significant.Conclusion: The increased change in interpremolar dimension was associated with more buccal tipping of premolars in SLB group. Increased incisor proclination and buccal tipping of premolars resulted in resolution of crowding in both groups rather than physiologic arch expansion of arch form.
Keyword :
Class II div 2 malocclusion, Self-ligating brackets, Preadjusted edgewise appliance