[Orthodontic treatment of a malocclusion with a compromised central upper incisor].

An 11-year-old girl presented at an orthodontist asking for the correction of the crooked position of her upper and lower front teeth. In addition, the patient was concerned about the abnormal shape and size of tooth 21. There was a disto-occlusion, crowding and tooth gemination of tooth 21 with the shape of a dens invaginatus. The tooth, moreover, was infected. Teeth 21 and 14 were extracted as part of the treatment. By means of a guided transposition, tooth 23 was brought to the extraction site of tooth 21. Treatment was performed with hybrid fixed appliance techniques.