A correlation of condylar inclination with dentoskeletal changes in class ii division i patients following twin block, fixed functional appliance therapy and camouflage

The class II malocclusion which is one of the most common skeletal malocclusions can be treated by a variety of treatment modalities includingsimple functional appliances, orthodontic camouflage to the more complex surgical intervention.The degree of dentoskeletal change brought by each modality varies and its implications on condylar inclination is vital and needed to be better understood.
Aims: Evaluation and comparison of the dentoskeletal changes achieved by twin block, fixed functional appliances and camouflage therapy in Class II Division I patients and its co-relation with changes in condylar inclination.
Material and Methods: The experimental sample consisted of 45 consecutively treated patients who were equally divided into camouflage, twin block and fixed functional groups. Lateral cephalograms were evaluated for 22 parameters (18 skeletal, 4 dental) at T1 (Pre-treatment); T3 (completion of fixed appliance therapy) for the three groups and at T2 (post functional therapy) for the twin block and fixed functional group. The majority of the cephalometric variables were normally distributed according to Shapiro-Wilk test and hence the differences between the groups were evaluated using parametric tests (paired t test). The significance for all tests was predetermined as P < 0.05.
Results: The amount of forward repositioning of the mandible was significantly higher by twin block therapy which also caused a greater opening of the mandibular plane angle compared to the other forms of therapy. The nasolabial angle at the end of therapy significantly differed between the fixed functional and the twin block group. The condylar inclination did not show significant difference in change between the groups before and after therapy.