Turkish Journal of Orthodontics, cilt.38, sa.3, ss.149-160, 2025 (ESCI, Scopus, TRDizin)
Objective: To compare the effects of the face mask and Carrière Motion® III appliance in growing patients with Class III malocclusion associated with maxillary retrognathia. The null hypothesis was that both appliances, applied after rapid maxillary expansion, would have similar effects. Methods: Skeletal, dental, and soft tissue changes were evaluated using lateral cephalometric radiographs of 26 patients aged 6-9 years, taken before (T0) and after treatment (T1). Cephalometric analyses were performed using Nemoceph® software (NEMOTEC, Madrid, Spain). Statistical analyses were carried out with MedCalc version 12.7.7 (MedCalc Software bvba, Ostend, Belgium) with significance set at p<0.05. Results: SNA°, A-NasionPerp, and Co-A increased significantly in both groups, with no significant intergroup difference. Co-Gn, Wits, ANB°, S-N, and the articular angle also increased significantly in both groups. SNB° decreased significantly only in the Carrière Motion® III group. Greater anterior maxillary rotation occurred with the face mask, while reduced rotation was observed with the Carrière Motion® III. Lower facial height decreased slightly but significantly in the Carrière Motion® III group, and increased in the face mask group. Overjet and molar relationship improved significantly in both groups. The UL-E line distance decreased in the face mask group, while the Carrière Motion® III showed no significant soft tissue changes. Conclusion: The null hypothesis was rejected. The two appliances had different effects; however, the Carrière Motion® III proved effective for early Class III treatment and may be considered an alternative, particularly for patients with social concerns about extraoral traction.