History of the present illness
This is a 12-year old African American female who was referred by her general dentist for orthodontic evaluation and treatment because of failure of the deciduous incisors to exfoliate and tooth #8 to erupt.  The panoramic radiograph showed a fully impacted tooth #8 (Figure 1).  The CT scan shows the tooth to be fully horizontal in the palate with the facial surface along the floor of the nose.  There is a radiolucent lesion filling the anterior alveolus in the #8 area above the roots of the primary incisors.  Within the lucency is a small round opacity.