Abstract
Abstract Introduction: Functional appliances redirect mandibular growth to correct skeletal discrepancies, especially in Class II malocclusion. Cone-beam computed tomography (CBCT) is suggested for evaluating condylar and mandibular morphology. This study compares skeletal alterations between twin block and cantilever bite jumper (CBJ) placement using CBCT. It assesses skeletal, dental, and temporomandibular joint (TMJ) changes. Objective: To compare the skeletal, dental, and TMJ changes after treatment with removable twin block and CBJ in skeletal Class II malocclusion in growing patients. Materials and Methods: In this study we included 40 patients, 20 in each group, randomly allocated using a lottery system. Twin block appliance or CBJ was fabricated for each patient. Pre and posttreatment records were collected over 12 months at 1, 8, and 12 months, by using cephalograms, CBCT. Results: Both groups show significant increases in mandibular length (Co-Gn). Twin Block Appliance therapy increases condylar volume and decreases condylar height by stimulating upward and backward growth. CBJ therapy also increases condylar volume and height. Twin Block modifies condylar position with increased width, while CBJ stimulates upward and backward growth, increasing overall condylar volume. Conclusion: The study concludes that the CBJ showed better skeletal changes, and the twin block appliance showed more dental changes than the CBJ appliance. Both the twin block and CBJ group showed TMJ changes. The CBJ group showed more TMJ changes than the twin block group. The overall efficacy of the CBJ is more than the Twin Block appliance because of more condylar remodeling.
Published Version
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