Early mandibular canine-lateral incisor transposition: case
The present case paper, published in the journal Oral and Implantology presents a case of mandibular transposition between lateral incisor and canine in a paediatric patient.

A 9-year-old male patient, nonsyndromic and free of other associated dental anomalies, was under treatment for the presence of a mandibular lateral incisor/canine transposition. The patient showed a slightly convex profile, harmonious smile (Figure 1 a), cross bit occlusion and a tendency to molar face to face (class I occlusion tending to class II). The canine class could not be defined because the lower canine had not erupted in arch yet (Figure 1 b).

The overjet was 3 millimetres, the overbite 3.5 millimetres (Figure 1 b). The dental midline was not symmetrical because the mandibular line was deviated 1 millimetre right in relationship with the maxillary, dental and facial line (Figure 1 b).

There was evidence of cross of molars, cross of incisors was not detected. The right permanent lower lateral incisor was next to the permanent first premolar, in a phase of early eruption. The deciduous canine and lower lateral incisor persisted in the arch. The permanent lateral incisor was located distally to the deciduous canine.

On the basis of the orthodontic check-up, the following treatment plan is set:

1. establishment of a class I dental occlusion;
2. development of an ideal overjet and overbite and correction of the cross-bite;
3. correction of the mandibular lateral incisor/canine transposition;
4. correction of the root inclination and angulation;
5. establishment of a skeletal class I.

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