Clinical and Cephalometric Comparison of Preorthodontic Trainer and Twin Block Appliance in Growing Patients with a Retropositioned Mandible in Skeletal Class II Malocclusion: A Randomized Clinical Trial

Abstract Introduction: Developing Class II malocclusion is one of the prevalent and dramatic problems in the growing dentition stage, which demands early interception. The prefabricated preorthodontic trainer (POT) was created in response to the need for a prefabricated, configurable device. The trainer system was created to combine the principles of myofunctional therapy with dental alignment into a user-friendly, single-size device. Materials and Methods: Patients after diagnosis with angles Class II malocclusion with retro-positioned mandible and an overjet >4 mm and ANB more than 4°, with normal dentition for the age were selected for the study. The study conducted, was an experimental randomized clinical trial on a sample size of 12, 6 of which were given the POT appliance and 6 acted as the control group and were given the conventional twin block appliance. Results: The overjet and overbite measures between the experimental and control groups did not differ significantly. Superior soft-tissue changes were accomplished with the POT appliance. The sagittal advancement by the POT and twin block appliance improved the upper and lower airway considerably. Conclusion: In comparison to standard twin block appliances, the POT appliance offers an easy alternative treatment strategy. The twin block appliance caused more skeletal alterations than the POT, although both appliances corrected a developing Class II Division 1 malocclusion. The POT appliance however, resulted in better soft-tissue corrections.