Treatment of skeletal Class II with retrognathic mandible in growing patient using modified sagittal guidance twin-block appliance

Background: Class II discrepancies were primarily perceived as sagittal problems. malocclusions usually cause aesthetic and functional problems, depending on the degree of anterior-posterior mismatch interaction with adjacent soft tissues. Purpose: This case report aimed to evaluate effect modified guidance twin-block (SGTB) for Skeletal Dental Changes in a growing patient. Case: A 10-year-old patient presented her parents complained mainly Diagnosis showed skeletal pattern (ANB 6º) retrognathic mandible, angle molar relationship, convex facial profile, lower dental midline shift, crowding anterior teeth, incompetent lips. Case Management: growth modification treatment plan was considered patient, using SGTB. Both bonded removable had same design. In SGTB, bite block angled at 70º, pushed toward occlusal plane maximize horizontal force mandible. As result, mandible is guided forward optimally positioned during occlusion. Conclusion: An ideal overjet slight correction teeth achieved after full-time wear SGTB 12 months. appliance effective treating