Dental trauma constitutes the 5% of oral-facial trauma. It is an emergency when it involves the dislocation of a permanent tooth. The study is a prospective study of 47 patients who had a dislocated tooth reimplanted and contained by a Dautrey arch. The main objective of this study is to study traumatic dislocation of permanent teeth and the particular objective is to show their incidence, the principle of reimplantation and retention with a Dautrey arch. Complete avulsion of a permanent tooth affects in particular male children between 7 and 12 years old, but it does not spare adults. The majority of teeth affected are the maxillary central incisors because of their position on the facial mass. After treatment, almost all patients have a positive immobility test and more than half have a positive vitality test. The immobility may be the result of regeneration of the desmodontal space, but it may also reflect aalveolodental ankylosis where the tooth is no longer alive. This work shows that the therapeutic protocol used was effective in preserving a permanent tooth.