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目的:探讨儿童骨性安氏Ⅲ错在替牙早期进行双期矫治的临床效果。方法:选择骨性安氏Ⅲ类错替牙早期患者50例,男22名,女28名,年龄范围6.0～8.5岁,平均年龄7.2岁。应用直丝弓矫治器,上颌加辅弓,进行扩弓、前方牵引和颌间Ⅲ类牵引,矫治前牙反,并进行正畸矫治前后头影测量,统计学分析采用配对t检验。结果:SNA角增大,平均增大1.20度,SNB角缩小,平均缩小1.15度,ANB角平均增大3.07度。结论:对儿童替牙期骨性安氏Ⅲ错早期矫治,采用直丝弓矫治器加辅弓,进行扩弓、前方牵引、颌间Ⅲ类牵引治疗,使双期矫治相连贯和结合,能够促进上颌骨生长,下颌骨抑制、后缩,前牙反纠正,面型改善。将双期矫治相连贯和结合,有利于Ⅲ类骨骼畸形的调整,矫治效果明显。
Objective: To investigate the clinical effect of skeletal Class Ⅱ malocclusion in children with early stage tooth replacement. Methods: 50 cases of skeletal Class Ⅲ malocclusion with early malocclusion were selected, including 22 males and 28 females, with an age range of 6.0-8.5 years and a mean age of 7.2 years. Application of straight wire appliance, maxillary and auxiliary bow, expansion arch, anterior traction and intermaxillary traction, orthodontic treatment of anterior cross brace, and orthodontic treatment of cephalometric measurements, statistical analysis using paired t test. Results: The SNA angle increased with an average increase of 1.20 degrees. The SNB angle was reduced with an average reduction of 1.15 degrees and an ANB angle increased by an average of 3.07 degrees. Conclusion: The early orthodontic treatment of skeletal Class Ⅱ malocclusion of the child during orthodontic treatment is performed by using the straight wire appliance plus auxiliary arch to extend the arch, frontal traction and intermaxillary traction. Can promote maxillary growth, mandibular inhibition, retrusion, anterior crossbite correction, face improvement. The two-phase correction of cohesion and combination, is conducive to the adjustment of type Ⅲ skeletal deformity, correction effect is obvious.