Cephalometric analysis of dental and skeletal effects of Carriere Motion 3D appliance for Class II malocclusion

Introduction: The objective was to describe the dental and skeletal changes obtained using the Carriere Motion Appliance (CMA), lateral cephalogram, and the corresponding cephalometric tracings. Methods: A sample of 29 patients with Class II malocclusion (mean age, 12.6 +/- 1.7 years) was retrospectively selected. All patients were treated at a single center using a CMA as the primary sagittal correction device. Cephalometric tracings at the beginning and end of treatment were compared. Each cephalometric tracing was performed 3 times by the same operator. Results: Using the CMA, the 29 patients studied reached dental Class I in 4.4 +/- 0.98 months. All measurements were subjected to statistical analysis, paired t test, and all displayed differences between T0 and T1 (P \0.05) except for the SNA. At the end of treatment, the Wits and ANB values were reduced by 1.38 mm and 0.8 degrees, respectively. Overbite and overjet were also reduced by 1.4 mm and 2 mm, respectively. The SNB, FMA, LAFH, and IMPA increased to a lesser extent (ie, 0.7 degrees, 0.4 degrees, 1.5 mm, and 1.5 degrees, respectively). Conclusions: The CMA is a rapid and efficient means of correcting Class II malocclusion. Its effects are predominantly dentoalveolar, with minimal skeletal alteration of little clinical significance. (