前方牵引矫治替牙早期骨性安氏Ⅲ类错的疗效评估  

Evaluation of maxillary protraction in treatment of skeletal class Ⅲ malocclusions in early mixed dentition

作　　者：蔡智芳[1] 王建国[1] 侯敏[1] 

机构地区：[1]天津市口腔医院口腔正畸科,天津300041

出　　处：《上海交通大学学报（医学版）》2008年第7期892-894,共3页Journal of Shanghai Jiao tong University:Medical Science

摘　　要：目的采用前方牵引矫治儿童替牙早期骨性Ⅲ类错畸形并进行疗效评估。方法14例替牙早期骨性安氏Ⅲ类错的患儿,戴用口内环托活动矫治器配合面具式前方牵引1年。治疗前后X线头影测量并进行对比分析,通过观察颌面部硬组织的变化,判断前方牵引的疗效。结果所有患者均解除前牙反,上颌骨均有不同程度向前、向下生长;A点前移,SNA角、ANB角显著增大;下颌骨前部向前生长受抑制并顺时针旋转,Wits值显著增大,上、下颌骨间不调改善;上颌骨前移、软组织侧貌改变明显,面下1/3前后关系协调。在矫治的保持时期,所有患儿恢复正常的生长型。结论前方牵引矫治替牙早期骨性安氏Ⅲ类错的效果显著,可减少患儿今后进行正颌手术的几率。Objective To evaluate the outcomes of maxillary protraction in the treatment of skeletal class Ⅲ malocclusions in early mixed dentition. Methods Fourteen patients with skeletal class Ⅲ malocclusions in early mixed dentition were treated with maxillary protraction for one year with oral active appliance bonded face mask. Cephalometric records were analyzed to assess the changes of maxillo-facial structure of the hard tissue before and after treatment. Results The anterior crossbite was unlocked in all the patients, and the maxilla moved downwards and forwards. Point A moved forwards, and angle SNA and ANB significantly increased. The mandible rotated downward and backward, and the Wits values significantly increased, which led to the correction of a skeletal class Ⅲ relationship. Maxillary length and protrusion significantly increased, and facial profile improved obviously. Conclusion Maxillary protraction works well in the treatment of skeletal class Ⅲ malocclusions in early mixed dentition, and can reduce the chances of later orthognathic surgery.

关 键 词：前方牵引 替牙早期 骨性Ⅲ类错[牙合] 硬组织 

分 类 号：R783.5[医药卫生—口腔医学]