Three-dimensional assessment of the temporomandibular joint and mandibular dimensions after early correction of the maxillary arch form in patients with Class II division 1 or division 2 malocclusion

摘要: Objective: This study aimed to assess three-dimensional changes in the temporomandibular joint positions and mandibular dimensions after correction of dental factors restricting growth patients with Class II division 1 or 2 malocclusion pubertal period. Methods: prospective clinical included 14 each (group I) II) malocclusions. The quad-helix was used for maxillary expansion, while utility arches were intrusion protrusion incisors. After approximately months treatment, an adequate arch width acceptable incisor inclination obtained. followed average 6 months. Intraoral extraoral photographs, plaster models, cone-beam computed tomography (CBCT) images obtained before treatment. Lateral cephalometric measurements made from CBCT images. Results: increased both groups, although positional also found group II. There no differences condylar position within fossa dimensions. depth symmetrical at treatment initiation completion. Conclusions: can be partially corrected by achieving ideal form, particularly malocclusion. Restrictions mandible transverse sagittal plane do not affect these because high adaptability this joint. [Korean J Orthod 2015;45(3):121-129]