The early treatment of unusual sever ectopic eruption of the bilateral maxillary canines in a young Japanese girl: A case report

The purpose of this report was to describe an unusual severe ectopic eruption of the bilateral maxillary canines in a young patient aged 7 years and 8 months and to discuss the effects of early intervention such as extraction of the predecessors and fenestration of the affected canines. The patient was referred to the author's clinic for a consultation regarding bilateral ectopically erupting maxillary canines with an ectopic maxillary right first molar. After improvement of the first molar, the affected canines were fully erupted and aligned in occlusion 3 years and 7 months after the extraction of primary canines. Before treatment, the findings on the orthopantomogram were as follows, there was no direct cause, both canine tooth germs were situated in very high positions, and the cusp tips of both canines were not overlapped with the roots of the adjacent lateral incisors (Sector 1). The maxillary left canine impacted horizontally in a mesio-distal direction (axial angulation: 90 degrees) could be successfully guided to eruption by early intervention such as the extraction of predecessors and three fenestrations. Even in severe ectopic cases, therefore, it is considered that traction may be postponed until no effect of fenestration can be detected in cases of early discovery and intervention when the crown top is situated in Sector 1.