PMC6594297_01
Intraoral photographs of the case at first examination. The second deciduous molar (8.5) is not visible at a clinical examination.
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fig1
Orthopantomogram of the case at first examination. The second deciduous molar appeared severely infraoccluded. The first molar (4.6) was severely inclined mesially.
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fig2
From the orthopantomogram (OPG), the second deciduous molar on the right side (8.5) appeared to be totally submerged (Figure 2).
Steps of the clinical application of the compressed NiTi wire.
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fig3
Clinical stages of the space regaining process: (a) first clinical examination; (b, c) after one month with the mechanic in place; (d) after three months before the extraction of the deciduous molar; (e, f) retention phase with a stiff wire until the eruption of the second premolar.
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fig4
Wilcock Scientific and Engineering Company, Whittlesea, Victoria, Australia) was bonded instead of the NiTi one in order to maintain the space for the eruption of the second premolar (Figures 4(e) and 4(f)).
Orthopantomogram of the case at the end of the treatment. The second premolar (4.5) has successfully erupted, and the first molar (4.6) presents a correct inclination.
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fig5
The final OPG shows the eruption of the second premolar, the uprighting of the first permanent molar (with no side effects on the eruption of the first premolars), and the canine on the same side (Figure 5).