Methods: Sixteen adult patients (13 women, 3 men; ages, 20.5 ± 3.6 years) who had been diagnosed as skeletal Class II with retrognathic mandible were selected. All patients had 2 maxillary first premolars extracted, and 2 mandibular second premolars extracted. Maxillary titanium screws were placed in all patients to provide anchorage for retraction of 6 anterior teeth. Screws were placed in all patients to apply intrusive force to the mandibular posterior teeth.
Results: A good mandibular response was achieved by the counterclockwise directional forces. The chin advancement was obtained by the autorotation of the mandible, facilitated by vertical control of the dentition, resulting in a significant decrease of the Frankfort mandibular plane angle by 2.5±1.92°, a reduction of the ANB angle by 1.5 ±1.08°, and a significant decrease of the occlusal plane angle by 3.5±1.13° . and anterior facial height was shortened by 2± 0.93 mm.
Conclusion: Directional force technology with miniscrew anchorage is a useful treatment approach for a patient with a Class II dentoalveolar-protrusion malocclusion and retrognathic mandible . It can create a favorable counterclockwise skeletal change and a balanced face without patient compliance.