Hybrid Hyrax/quad-helix appliance in the phase I treatment of pseudo–Class III malocclusion

We introduce in this case report the appropriate diagnosis of a pseudo–Class III patient and a novel appliance that we designed to treat this malocclusion. This appliance efficiently corrected the severe malocclusion in a very short period of time. The efficiency of this appliance comes from its ability to address several clinical concerns at one time. Pseudo Class III is a type of malocclusion that is established by habitually positioning the mandible in the position where the entire anterior dentition is in crossbite but without a skeletal discrepancy. If such malocclusion is left untreated in its early stages, severe sagittal discrepancy of the maxilla and mandible may develop over the growing years, leading to very complicated treatment options in the future. We share our experience of an effective method for early treatment of a pseudo–Class III malocclusion in this case report.