摘要目的 通过头影测量分析了解矫形-正畸联合矫正在治疗乳牙反(牙合)中的临床效果.方法 选取12例中度乳牙反(牙合)患者作为实验组,8例正常乳牙(牙合)儿童作为对照组.实验组每名患儿先接受经改良的前方牵引装置治疗,矫形力为2.94～4.90 N(300～500 g),方向一般取偏向(牙合)平面下方约37°,戴用时间约10 h/d.治疗6个月后,停止前牵引,立即接受正畸治疗,直至反(牙合)解除,并稳定2个月,拆除矫治器,治疗结束.通过比较治疗前(T1),矫形治疗后(T2)及正畸治疗结束后(T3)两组的头影变化,了解联合矫正的临床效果.结果 治疗结束时12例患者均解除反(牙合),实验组的A点前移约2.80 mm,上前牙切缘前移了8.38 mm,＜SNA增加2.65°,下切牙稍舌倾.以上变化与对照组相比,差异有统计学意义(P<0.001).结论 矫形-正畸联合矫正可以使患儿的骨骼畸形及牙(牙合)畸形均得到了较大的改善,是治疗乳牙中度反(牙合)的较好方法.

abstractsObjective To study the clinical effect of orthopedic-orthodontic treatment in crossbite in deciduous dentition through cephalmetric analysis. Methods 12 children with crossbite in deciduous dentition were enrolled in treatment group. Control group included 8 patients with normal deciduous dentition. Modified reverse headgear was used in each patient in the treatment group. Orthodontic force was a-bout 2. 94-4. 90 N (300-500 g) , and the direction of force was under occlusion plane for 37 degree. Each patient wore reverse headgear for 10 hour per day. Orthodontic treatment lasted for 6 months, and then orthodontic treatment began at once. Orthodontic treatment was not over until crossbite was corrected. The cephalmetric change was compared between two groups before treatment (T1) , after orthopedic treatment (T2)and after orthodontic treatment (T3). The effect of orthopedic-orthodontic treatment was analyzed in two group. Results Crossbite was corrected successfully in all patients in the treatment group. After treatment, A point moved forward by 2. 8mm, Is-FHp increased 8. 38 mm, ＜SNA increased 2. 65, incisors in mandible moved backward a little bit. All these changes were statistical different as compared with those in the control group. Conclusion Skeletal and dental deformity are improved progressively after combined orthopedic-orthodontic treatment. It is recommended to perform orthopedic-orthodontic therapy in skeletal crossbite in deciduous dentition.