Abstract :
Objective: To test the null hypothesis that premolar extraction had no favorable effect on the angulation of developing third molar among subjects undergoing comprehensive orthodontic treatment.
Materials and Methods: Pre- and post-treatment orthopantomograms of 73 subjects in the age range of 13-24 years were divided into three groups to evaluate the effect of premolar extraction on the improvement of developing third molar angulation. Group-I (n=26) included subjects in whom all first premolars were extracted, Group-II (n=20) included subjects in whom all second premolars were extracted and Group-III (n=27) included subjects in whom non-extraction orthodontic treatment was carried out for the correction of their malocclusion. Descriptive statistics, paired t-test were used for the statistical analysis. The P-value of 0.05 was considered as level of significant.
Results: The mean angulations of maxillary third molars were increased significantly following first and second premolars extraction treatment (P
Keyword :
Premolar Extraction, Third Molar Angulation, Orthodontic Treatment