Innovative approach in class II malocclusion treatment: Evaluating mini-screw anchorage with carriere motion appliance through cone beam computed tomography imaging

Background and aim The Carriere Distalizer (Henry Schein Inc., New York, NY) is marketed as a Class II corrector that distalizes the maxillary posterior segments while rotating and uprighting the maxillary first molars. A clear retainer, a lower lingual holding arch, or, more recently, mini-screws can all be used to stabilize the lower arch for anchorage. This study used cone beam computed tomography to assess how well the Carriere Motion Appliance corrected Class II malocclusion, with a focus on anchorage loss in lower anterior teeth. Patients and methods In this study, twenty adolescents with Class II molar relationships underwent treatment using the Carriere Motion Appliance in conjunction with direct mini-screws. Cone beam computed tomography scans were performed at two key stages: before treatment initiation (T0) and after the distalization phase (T1). The resulting changes in various measurements were meticulously calculated and subsequently compared to assess the treatment’s effectiveness. Results The study observed a nonsignificant anterior movement of 0.06±1.45 mm and a proclination of 0.868±2.228 using direct mini-screws. Notably, the maxillary molar distalization achieved was 2.57±1.52 mm, which is higher than other conventional anchorage methods. Conclusion By using direct mini-screws, anchorage loss in the mandibular incisors was minimized, effectively reducing both mesial tipping as well as proclination.