Anterior crossbite treatment with Guia pam III appliance: a clinical case report

This article presents a case report of a patient with Angle Class III malocclusion and total crossbite, nasal breathing, treated in 11 months with the GUIA PAM III (Postero Anterior Marinho’s) appliance. Early treatment, initiated at 6 years and 8 months repositioned and controlled mandibular growth and corrected the crossbite. Cephalometric measurements taken before and after treatment were used to evaluate the changes resulting from the use of the PAM III appliance proved effective in both stimulating maxillary growth and in increasing maxillary length. According to the results obtained in the initial and final cephalometric measurements, we were able to observe significant changes such as the cephalometric values SNA, which was 84.54° and changed to 86.46°, and 1/.NA, which was 7.72° and changed to 17.14°.