A Case of Skeletal Mandibular Protrusion with Transposed Right Maxillary Canine Treated during the First Phase of Treatment

Abstract

Relocation of maxillary canine teeth is rarely performed in clinical practice ; depending on the position of the tooth embryo, it may cause root resorption of the adjacent teeth, making subsequent treatment more difficult. In the present case, we experienced the long-term management of a patient with skeletal mandibular prognathism who had transposed maxillary right canine and lateral incisor, and significant root resorption in the right central incisor. The patient, a 9-year-old girl, was referred to our clinic by her primary care physician, who noted an abnormal eruption direction of the maxillary right canine tooth. In the first phase of orthodontic treatment, the maxillary right central incisor was extracted and the maxillary right canine was orthodontically aligned in its place. The surgical procedure in the first phase of orthodontic treatment was performed at our pediatric dental clinic. In the second phase, orthognathic surgery for the skeletal mandibular protrusion was performed. Prosthodontic treatment was performed on the maxillary right canine teeth, which were aligned at the position of the maxillary right central incisor, and good esthetic and functional outcomes were achieved. In addition, through collaboration with pediatric dentistry, the oral environment was maintained well during the occlusal treatment period, and no caries was observed. Two years after the second phase of orthodontic treatment, a good occlusal relation was maintained.