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目的:研究牙列拥挤患者经改良摆式矫治器与上唇挡联合治疗后的颅颌面结构的变化。方法:选取应用改良摆式矫治器与上唇挡联合应用治疗替牙晚期或恒牙初期重度牙列拥挤病例21例,测量矫治前后的头颅侧位定位片并进行配对t检验以评估疗效。结果:治疗后与治疗前比较:A点前移,SNA增加3.68°。上磨牙远中移动,U6-PTV减少2.96mm。结论:改良摆式矫治器与上唇挡联合应用可以有效矫治重度牙列拥挤,远移磨牙、促进上颌前部发育、改善患者侧貌外形。
Objective: To study the change of craniomaxillofacial structure after the combined treatment of modified pendulum orthosis and upper lip block in patients with crowded dentition. Methods: Twenty-one patients with severe dentition hyperaemia treated with modified pendulum appliance and upper lip block were selected for the study. Cephalometric test was performed before and after treatment, and paired t-test was performed to evaluate the effect. Results: Compared with before treatment: A point forward, SNA increased 3.68 °. Upper molars moved far, reducing U6-PTV 2.96mm. Conclusion: The combined application of improved pendulum appliance and upper lip block can effectively correct the crowding of the crowded dentition, move the molar away, promote the development of the maxillary anterior part and improve the profile of the patient.