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目的 研究改良型ACTIVATOR矫治早期反对颅颌面三维结构的影响。方法 采用改良型ACTIVATOR矫治乳牙期及替牙期前牙反 80人 ,对治疗前后的模型、薛氏位关节片及头颅侧位片投影测量进行分析。结果 ①上下颌牙弓宽度治疗前后无明显改变 ;②上颌长度及突度增大 ,上切牙唇倾 ;③下颌髁突后退至正常位 ,上下颌基骨关系明显改善 ,乳牙反改变最明显 ,矫治后呈Ⅰ类骨面型 ,替牙期反矫治后仍遗留骨骼异常 ,骨面型仍属Ⅲ类 ;④下切牙舌倾及颏角变小更趋严重。结论 改良型ACTIVATOR矫治反 ,能有效促进上颌生长 ,抑制下颌生长 ,使颅颌面的生长方向趋向正常
Objective To study the effect of modified ACTIVATOR on craniofacial three-dimensional structure in early stage. Methods A modified ACTIVATOR was used to treat 80 cases of antegrade anterior teeth during deciduous period and anterior teeth, and the model, Schröber's joint films and cephalometric films were measured before and after treatment. Results ① There was no significant change in maxillary and mandibular arch width before and after treatment. ② The maxillary length and protrusion increased, and the incisors' labial inclination increased. ③ The mandibular condyle retreated to normal position, Obviously, after treatment was a type Ⅰ bone surface type, tooth replacement 反 continued after treatment of skeletal abnormalities, bone surface type is still a class Ⅲ; ④ incisors and chin angle lower incision becomes more serious. Conclusion Modified ACTIVATOR treatment of anti-, can effectively promote the maxillary growth, inhibit the growth of the mandible, so that the growth direction of the cranio-maxillofacial tend to normal