Abstract
Our present study compares the skeletal and dentoalveolar changes between 120 subjects in mixed dentition treated with "Distal Active Concept" therapy versus 157 untreated subjects of class II served as a control group. Upon considering the treated subjects, a highly significant difference of mandibular growth (p < or = 0.001) with an anticlockwise rotation is noticed. The comparisons done according to gender and facial divergence show that the linear measurements are greater in males than females but the vertical relations are identical. Moreover, when considering hypodivergent and normodivergent subjects, all cephalometric values are similar and when regarding treated or non treated subjects, a significant difference of vertical growth factors exists and prevails. After comparaison, results clarify the benefits of early treatment for Class II malocclusion when the skeletal imbalance is considerable as it causes a quick mandibular response and hence improving the facial harmony dramatically.
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