Treatment of unilateral crossbite using modified palatal arch: case report.

Severe unilateral crossbite was diagnosed in a five-year and five-month Taiwanese girl. Clinical examination presented left posterior and anterior crossbites resulting in significant dental and facial midline deviations. Early intervention was recommended in this case for severe functional shift which might induce facial asymmetry. The unilateral crossbite was successfully treated using modified palatal arch with finger springs. The patient has shown stable occlusion and no midline deviation after six years of follow-up.