Vol. 4, Issue 5 (2019)
Comparison of long term vertical dimension changes using pea and begg mechanotherapy in extraction and non-extraction orthodontic treated cases-a cephalometric study
Author(s): Dr. Chandan Kumar, Dr. Sharath Kumar NS, Dr. K Sadashiva Shetty, Dr. Riddhi Chawla
Abstract: Background and Objectives: There exists a controversy regarding the effect of extraction and non-extraction treatment protocol on the facial vertical dimension change. The purpose of this study was to examine cephalometrically the dentofacial vertical changes in Class I subjects undergoing extraction of all four first premolars or no extraction between the preadjusted edgewise appliance (PEA) and the Begg appliance from pre to immediate post treatment and immediate post treatment to minimum 2yr post treatment. Method: This study was carried out on 48 patients who were divided into 2 groups- Begg and PEA. Pre-treatment, immediate post treatment and minimum 2 years follow up lateral cephalograms of 24 patients treated with Begg mechanotherapy and 24 patients treated with pre adjusted edgewise appliance were used. Unpaired t- test was employed to compare the difference in facial vertical dimension change between the groups. Repeated measures ANOVA was used to compare the difference in facial vertical dimension change in extraction and non-extraction groups at pretreatment, immediate post treatment and minimum 2 years after treatment. Results: No significant differences were observed when intra group and inter group comparison was made for Begg mechanotherapy and PEA mechanotherapy in vertical dimension. Conclusion: Thus, regardless of mechanotherapy used there is no vertical dimension change in either extraction or non-extraction group. The insignificant change observed from pretreatment to post treatment tends to revert back to pretreatment during post retention period.
Please use another browser.