Résumé
Timing of orthodontic treatment is a controversial topic among clinicians, showing great diversity of opinions; some recommending intervention early in the occlusal development, and others arguing in favour of treatment in the late mixed or early permanent dentition. Early interceptive orthodontic treatment for elimination of different factors affecting dental arch development, growth of maxilla and mandible is well debated and has a mixed response among clinicians, possibly because of little scientific evidence that exists to support such intervention and actual benefit from such early treatment. This article aimed to review various studies and evaluate the efficacy of early orthodontic intervention and concluded that treatment in the early mixed dentition is an effective method to restore normal occlusion and eliminate the need for further orthodontic treatment.