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Anomalies of Tooth Structure

Course Number: 651

Transposition

When two adjacent teeth have exchanged their normal sequential order, the condition is called transposition.9 The teeth most frequently involved are the permanent canine and first premolar in which the premolar erupts anterior to the canine tooth (Figure 18).9 This condition is observed in the permanent dentition but is not seen in the primary dentition.9

Figure 18.

Image courtesy of Dr. Christos Angelopoulos.

Cropped Cone Beam Computed Tomography (CBCT) panoramic reformat showing transposition of maxillary left first premolar #12 and impacted maxillary left canine #11.