Glenoid Fossa Response to Myofunctional Treatment in Skeletally Retruded Cases

Objectives: This study was undertaken to evaluate glenoid fossa changes in response to twin block appliance therapy and to correlate the changes in glenoid fossa with changes in craniofacial morphology. Materials and methods: The present study was conducted on pre and post-treatment cephalograms of 30 (15 males and 15 females) myofunctionally treated, Angle’s Class II div. 1 patients with the mean age of 12.8 years for males and 10.15 years for females. Mean treatment duration was 10 + 1.46 months for males and 10.6 + 2.59 years for females. All the cephalograms were traced and analyzed for four linear variables to assess glenoid fossa changes and nine linear, five angular parameters to assess changes in craniofacial morphology. Results: The glenoid fossa was found to be relocated sagitally as well as vertically. Mandibular length was increased with simultaneous forward positioning of mandible. Increase in lower facial height and restraining of maxillary growth was also reported. Conclusion: Favorable craniofacial changes were well supported by glenoid fossa changes.