Relationship between orthodontic treatment, condylar position, and internal derangement in the temporomandibular joint

摘要: The purpose of this study was to test the hypothesis that retraction maxillary front teeth may lock mandible in a posterior position, and evaluate any relationship between condylar position signs symptoms internal derangements temporomandibular joint. A total 29 female patients treated for Angle Class II, Division 1 malocclusion with extraction first premolars 34 I without tooth consented participate radiographic clinical follow-up examination. mean ages were 16.9 (SD 3.0) 16.6 2.6) years, times after treatment 1.6 1.0) 1.5 0.9) respectively. Condylar measured percent anterior displacement from absolute concentricity on lateral, central, medial tomographic sections each Mean more at right central ( P