Transposition - Transposed Teeth

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 (Figures 18, 19).⁹ This condition is observed in the permanent dentition but is not seen in the primary dentition.⁹

Figure 18.

Figure 18.

Cropped panoramic radiograph showing transposition of impacted maxillary right first premolar tooth #5 and maxillary right canine tooth #6

Figure 19.

Figure 19.

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

Figure 19 courtesy of Dr. Christos Angelopoulos.