Tip-Edge Plus直丝弓技术矫治Ⅲ类错[牙合]的临床初探  

Preliminary investigation of Tip-Edge Plus technique in the treatment of Class Ⅲ malocclusion

作　　者：陈莉莉[1] 林久祥[1] 许天民[1] 

机构地区：[1]北京大学口腔医学院口腔医院正畸科,北京100081

出　　处：《中华口腔医学杂志》2009年第10期588-593,共6页Chinese Journal of Stomatology

基　　金：“十五”国家科技攻关计划（2004BA720A25）.

摘　　要：目的应用Tip-Edge Plus直丝弓技术矫治Ⅲ类错骀，观察患者颅面、牙[牙合]特征的改变，探讨Tip-Edge Plus直丝弓技术矫治Ⅲ类错骀的特点及临床应用要点。方法应用Tip-Edge Plus直丝弓技术矫治13例（女性6例，男性7例，平均14.9岁）Ⅲ类错[牙合]合并下颌前突的患者。所有患者均拔除4颗前磨牙。矫治前后进行x线头影测量比较。结果矫治后Wits值由（-2.50±1.40）mm变为（-1.00±0.85）mm，ANB角由（-0.61±1.41）。变为（1.31±1.66）°，矫治前后的差异均有统计学意义（P〈0.05）。上下切牙显著内收，上中切牙突度由（7.55±1.24）mm减小为（d.82±1.05）mm，下中切牙突度由（10.16±2.43）mm减小为（6.03±2.01）mm，矫治前后的差异均有统计学意义（P〈0.01）。矫治后患者软组织侧貌明显改善，上、下唇突点到snPg’平面的距离之差由（-1.57±1.24）mm变为（0.62±1.24）mm，面型角由（2.62±1.53）。变为（7.02±2.21）°，矫治前后的差异均有统计学意义（P〈0.01）。结论利用Tip-Edge Plus直丝弓技术的持续轻力快速倾斜移动牙齿，在改善硬组织形态的同时可显著改善软组织侧貌。Objective To investigate the craniofacial and occlusal changes of Class Ⅲ cases treated with Tip-Edge Plus Technique. Methods Thirteen Class Ⅲ patients （6 girls and 7 boys, mean age 14.9 years） with mandibular protrusion were selected. All the patients were four premolar extraction cases and treated with Tip-Edge Plus technique. Cephalometric analysis was performed to evaluate the changes before and after treatment. Results After treatment, Wits changed from （-2.50±1.40） mm to （-1.00±0.85） mm and ANB changed from（-0.61±1.41）° to （1.31 ±1.66）°（P〈0.05）. UL-E and LL-E were decreased significantly from （7.55±1.24） mm to（4.82± 1.05） mm and from （10.16±2.43）mm to （6.03±2.01） mm respectively （ P 〈 0.01）. The incisors were retracted. A remarkable soft tissue change was noted after the treatment. The difference between the distance of the upper lip and lower lip to SnPg＇ at the beginning of treatment changed from （-1.57±1.24） mm to （0.62±1.24） mm （P 〈 0.01）. FCA changed from （2.62±1.53）° to （7.02±2.21）°. Conclusions With Tip-Edge Plus straight-wire technique and light continuous force, anterior teeth could be tipped distally and lingually quickly. The hard and soft tissues changed accordingly.

关 键 词：正畸矫正器 错[牙合] 安氏Ⅲ类 直丝弓矫治技术 下颌前突 

分 类 号：R686[医药卫生—骨科学]