24矫治技术矫正替牙期前牙反合的临床分析.doc

2×4矫治技术矫正替牙期前牙反合的临床分析 【摘要】 目的 探讨2times;4矫治技术在矫正替牙期前牙反中的作用、特点和临床疗效。方法 应用2times;4矫治技术配合上颌后牙垫和类牵引矫正替牙期前牙反。结果 2times;4矫治技术可以改正前牙反，缩短疗程，同时还可以减少患者复诊的次数。结论 2times;4矫治技术矫正替牙期前牙反是一种很有效的方法。 【关键词】 2times;4矫治技术； 替牙期； 前牙反合 BThe clinical analysis of 2times;4 corrective technique applied in correcting the anterior crossbite during the mixed dentition CUI Zhou-ying1, LAI Wen-li2, JIANG Xing-ke3, ZHANG Ying-min4. （1. Dept. of Stomatology,Huli Hospital of Xiamen, Xiamen 361006, China; 2. Dept. of Orthodontics, West China College of Stomatology, Sichuan University, Chengdu 610041, China; 3. Dept. of Stomatology, Integrated Traditional and West Medicine Hospital of Hechuan, Chongqing 401520, China; 4. Dept. of Stomatology, The First Workerprime;s Hospital, Mining Bureau of Datong, Datong 037003, China） [Abstract] Objective To discuss the clinical effects and characteristics of 2times;4 corrective technique applied in correcting the anterior crossbite during the mixed dentition. Methods The 2times;4 corrective technique and biteplate of posterior upper teeth as well as Class Ⅲ elastic force was applied to correct the anterior crossbite of mixed dentition. Results This method was able to correct the anterior crossbite and also to reduce the time of treatment and to spare the frequency of seeing the doctor again. Conclusion 2times;4 corrective technique is an effective method of correcting the anterior crossbite during the mixed dentition and is valuable to spread. [Key words] 2times;4 corrective technique； mixed dentition； anterior crossbite 前牙反是临床上较为常见的错畸形，严重影响患者牙颌面的发育，且随着颌面部的生长发育呈进行性加重的趋势，所以必须早期矫治，以阻断错畸形的继续发展[1]。替牙期正处于乳、恒牙替换和发育的前期，在牙列和生理上有其特点。笔者采用2times;4矫治技术辅以上颌垫及颌间Ⅲ类牵引和斜行牵引[2]矫正8例替牙期反患者，取得了满意的疗效，报告如下。 1 材料和方法 1.1 研究对象 选择2001年8月mdash;2003年9月于四川大学华西口腔医院正畸科就诊的8例替牙期前牙牙性和轻度骨性反患者为研究对象。患者中男3例，女5例；年龄7～10岁，平均年龄8.5岁。患者均为混合牙列，第一磨牙、中切牙和侧切牙萌出完全，反覆～度，反覆盖度，上、下牙列拥挤度不超过度，下颌不能完全退至上、下切牙对刃咬合，磨牙关系为基本中性或轻度近中关系，软组织侧貌为直面型或轻度凹面型。 1.2 矫治方法 采用2times;4矫治技术辅以上颌垫及类牵引和斜行牵引给予矫正，步骤如下。1）常规治疗前后取记存模型，拍摄颜面、