Objective To evaluate whether there is difference with regard to chin morphology in subjects with different vertical skeletal craniofacial pattern and the relationship among them. Methods The sample was composed of 80 adolescents who denied orthodontic treatment history and presented ClassⅠskeletal pattern, aged（12.69±0.70） years. They were divided into three groups according to mandibular plane angle: High angle group（21 cases, FH/MP≥ 32°）, average angle group（43 cases, 22°
