Figure 3. Bilateral PDCs in a girl aged 11 years 2 months at the start of the treatment with similar grade
F1
ipane
of displacement on the right and left sides at baseline. The left deciduous canine was extracted (indicated
as X). On the control side, the canine was surgically exposed since a worsening of the canine position
was noted at T2 i.e. mesioangular and sagittal angle had increased and the distance canine cusp tipmidline was more or less the same. However, the canine cusp tip-dental arch plane had decreased but
this movement was small compared to the extracted side. The permanent canine on the extraction side
showed improvement of all radiographic variables at T2. It was therefore it was determined to follow the
canine clinically and, if necessary, with intraoral x-rays until it emerged through the gingiva. The canine
on the extraction side erupted at 20 months.
Figure 4. Bilateral PDCs in a girl aged 12 years 1 month at baseline. The right permanent canine had
more severe mesioangular angle and was positioned more palatally to the dental arch plane than the left
side at baseline. Extraction was done of the left deciduous canine (indicated as X). However, on the 12month radiographic measurements, both the right and left permanent canines had worsened according to
the radiographic variables and the right deciduous canine was extracted and the patient had surgical
exposure of both canines.