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This cephalometric study evaluates the stability of skeletal and dento-alveolar changes after 6 to 9 months of early orthodontic treatment of Class II malocclusions with the Distal Active Concept (DAC). An analysis of the results showed significant skeletal changes, notably an average of 8.5 mm of mandibular growth, which remained stable after the close of treatment. However, the correction of the maxillary incisal protrusion relapsed slightly. The treatment-provoked lower incisal labial inclination proved to be temporary, with the lower anterior teeth returning to their initial position at the close of the 30-month post-treatment observation period.