Quad Helix: interceptive treatment of a Class II malocclusion.

Abstract

Introduction: The Quad Helix is ​​an evolution of the rubber appliance suggested by Coffin and modified by Ricketts, which consists of 4 helical loops that, when activated, exert pressure to expand the arch and allow molar rotation and distalization, orthopedically affecting the midpalatal suture in growing patients. It is used to correct uni or bilateral posterior crossbites, cases where a small expansion is required in mixed or permanent dentition, in the treatment of Class I, II and III malocclusions, as anchorage reinforcement among other purposes, thus becoming a basic multifunctional device. Case report: 7-year-old boy with bone-dental discrepancy in an early mixed dentition, without primate spaces, type II Baume arch, dental and skeletal class II. Procedures were planned that included: prophylaxis and performance of superior Quad Helix and inferior Bihelix. All dental procedures included behavioral management of the child. Conclusions: The results demonstrate that this appliance is effective for maxillary expansion, rotation and distalization of upper molars, achieving the necessary space for the eruption of permanent teeth, in addition to being a fixed, hygienic, aesthetic, economical and well accepted appliance by patients.