摘要目的 初步探讨单纯前方牵引矫治器治疗骨性Ⅲ类错(牙合)的软组织、硬组织的改变.方法 选择17名骨性前牙反耠的患者,男9名,女8名,年龄7～12岁,平均年龄9.8岁,平均疗程13.4月,未进行扩弓直接应用前方牵引矫治器进行治疗.术前术后拍头颅侧位片,测量17名患者治疗前后软硬组织的改变.头影测量采用Dental vision软件,记录软硬组织的变化.结果 上颌骨前移1.8 mm,差别具有显著性差异,上前牙唇倾4.2度,差别有显著性差异,上前牙前移3.4 mm,差别有显著性差异.下颌骨后退4.1 mm,差别具有显著性差异,下切牙后退3.9 mm,差别具有显著性差异.软组织的改变:上唇突、下唇突、面型角、上唇-审美距、下唇-审美距、鼻点-H线、下唇-H线、颏沟点-H线的距离均向正常值靠拢,差别具有显著性差异,提示患者的面型更加协调.结论 单纯前方牵引矫治器治疗骨性Ⅲ类错(牙合)也能达到较好的效果,使患者的软硬组织得到明显改善.

abstractsObjective To evaluate the change of hard and soft tissue in patients with skeletal anterior cross bite treated with protraction headgear appliance.Method 17 patients aged from 7～12 years(mean 9.8 years) with skeletal anterior cross bite were selected.Cephalometric amalysis was performed before and after orthodontic therapy.Dental vision software was used to analyze changes.Result Significant differences were found in A-OLp, B-OLp,U1-OLp, L1-OLp, ULP,LLP,FCA, UL-E, LL-E, N-H, Sn-H, LL-H, Si-H.Conclusion Protraction headgear appliance was effective and it could give patients a more harmony profile.