BACKGROUND: The Hyrax rapid palatal expander is useful for patients in mixed dentition witht premature exfoliation of
some deciduous teeth and maxillary hypoplasia. This appliance, which is provided of a vestibular arm for correcting maxillary
asymmetric transverse discrepancies, represents an interceptive treatment able to reduce the duration of the orthodontic therapy with
fixed appliances. CASE REPORT: In this case report the modified version of the Hyrax rapid palatal expander is described. The
activation method, the therapeutic benefits as well as the clinical advantages are described.
Vol.15 – n.2 suppl/2014
Harvard: G. Farronato, L. Giannini, G. Galbiati, C. Maspero (2014) "Upper midline deviation: modified Hyrax expander", European Journal of Paediatric Dentistry, 15(2 suppl), pp174-176. doi:
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