传动直丝弓技术矫治壮族青少年双颌前突畸形的疗效评价

目的:探讨传动直丝弓技术矫治广西壮族青少年双颌前突畸形的临床效果。方法:对24例双颌前突畸形的广西壮族青少年采用传动直丝弓技术进行矫治,24例患者均拔除4颗第一前磨牙。对矫治前后的X线头颅侧位定位片进行相关项目的测量并统计分析其变化。结果:矫治后上下切牙明显内收,U1-L1角增加26.1°(P<0.001);软组织侧貌明显改善,接近直面型,鼻唇角(NLA)平均增加21.71°,Z角平均增加7.33°,治疗前后变化均有统计学意义(P<0.001)。结论:双颌前突畸形的广西壮族青少年经传动直丝弓技术矫治后,可以获得良好的牙合关系及较为理想的侧貌。

Clinic effect of guangxi zhuang adolescents with bimaxillary protrusion after orthodontic treatment of transmission straight wire technique

Objective To investigate the chinic effect of guangxi zhuang adolescents with bimaxillary Protrusion treated by transmission straight wire technique. Methods 24 guangxi zhuang adolescents with bimaxillary Protrusion were treated by transmission straight wire technique and were extracted by 4 first premolars,Cephalograms taken before and after treatment were traced and some variables were compared. Results After treatment, the upper and lower incisors were retracted significantly with the U1-L1 angle got a mean raise of 26.1°（P〈0.001） and soft tissue profile were improved and straight profile were achieved with the NLA angle and Z angle got a mean raise of 21.71°and 7.33° respectively （P〈0.001）. Conclusion Guangxi zhuang adolescents with bimaxillary Protrusion can achieve good occlusion and soft tissue profile after the orthodontic treatment of transmission straight wire technique.