Johnston分析法评价快速扩弓结合前方牵引治疗恒牙早期骨性Ⅲ类错的疗效  

Clinical evaluation on rapid maxillary expansion and maxillary protraction in treating Class Ⅲ malocclusion by Johnston analysis

作　　者：李红[1] 王春玲[1] 苏盈盈[1] 潘爽[1] 朱秀娟[1] 

机构地区：[1]山东大学口腔医院正畸科,山东济南250012

出　　处：《临床口腔医学杂志》2008年第10期611-613,共3页Journal of Clinical Stomatology

基　　金：山东省自然科学基金资助(Y2005C22)

摘　　要：目的:利用Johnston分析法评价快速扩弓结合前方牵引治疗恒牙早期骨性Ⅲ类错的硬组织变化,了解牙性及骨性变化对治疗结果的影响。方法:选取26例恒牙早期骨性Ⅲ类错病例进行上颌快速扩弓结合前方牵引进行矫治,拍摄治疗前后X线头颅侧位片,利用Johnston分析法进行测量分析,测量数据进行t检验。结果:矢状方向上,上颌骨相对颅底前移1.24mm,下颌骨相对颅底后移1.65mm,上下颌骨相对位置(ABCH)变化了2.89mm(p<0.001);上下磨牙及上切牙均明显前移,下切牙略后移,矫治后磨牙关系及前牙覆盖分别改变了4.25mm(p<0.001)、4.49mm(p<0.001)。结论:恒牙早期骨性Ⅲ类错使用快速扩弓结合前方牵引治疗能使上下颌骨和牙齿发生有利的变化,并以骨性变化为主。Objective： To evaluate the change of hard tissue produced by rapid maxillary expansion and maxillary protraction exhibiting skeletal Class Ⅲ malocclusion by Johnston analysis, and understand the skeletal and dental contribu- tion to the correction respectively. Method： 26 skeletal Class Ⅲ patients with retruded maxilla were treated with rapid maxillary expansion and maxillary protraction. Cephalometric radiographs were taken before and after treatment, then analyzed by Johnston analysis.Values were analyzed with student/s t-test. Result： The correction was due more to the mandible than the maxilla （1.65 mm and 1.24 mm, respectively）, resulting in an ABCH of 2.89 mm （p〈0.001）.The upper and lower molars moved forward and combined with the ABCH resulted in a 6 / 6 of 4.25 mm （p〈0.001）.The upper incisor moved forward while the lower incisor moved back,resulting in a 1 / 1 of 4.49 mm （p〈0.001）.Conclusion：facemask/palatal expansion therapy improves Class Ⅲ malocclusion by a combination of skeletal and dental changes, while the majority of the correction is skeletal in nature.

关 键 词：头影测量 Johnston分析法 骨性Ⅲ类错[牙合] 快速扩弓 前方牵引 

分 类 号：R783.5[医药卫生—口腔医学]