Frankel-Ⅲ矫治器矫治替牙期AngleⅢ类错的软组织变化

Soft tissue profile changes by Frankel-Ⅲ appliance on correcting Angle Class Ⅲ malocclusion in mixed dentition

目的:分析Frankel-Ⅲ功能矫治器治疗替牙期AngleⅢ类错患者软组织的改变,并评价该矫治器的临床疗效。方法:选择替牙期AngleⅢ类错患者15例,男8例,女7例;年龄7～12岁,平均年龄9岁5个月,分别对治疗前、后的临床表现及软组织头颅侧位定位片进行分析。测量数据采用SPSS17.0软件包进行配对t检验。结果:经过Frankel-Ⅲ功能矫治器的治疗,上、下唇基角、面凸角和下唇角增加,下唇基角、软组织角和下唇突距减小,具有显著性差异(P<0.01)。上唇基角、上唇角、下面高、全面高和上唇突距增加,具有显著性差异(P<0.05)。结论:Frankel-Ⅲ矫治器治疗后,患者的鼻、上唇、下唇、颏关系趋于协调,上、下颌软组织变化比较明显,软组织侧貌由Ⅲ类凹面型转变为Ⅰ类面型。Frankel-Ⅲ矫治器是治疗AngleⅢ类错的理想装置。

PURPOSE： The purpose of this study was to evaluate the soft tissue profile changes of functional Angle Class Ⅲ malocclusion in mixed dentition,and to evaluate the effectiveness of treatment with Frankel-Ⅲ appliances.METHODS： Fifteen cases of Angle Class Ⅲ malocclusion in mixed dentition,8 males and 7 females,were selected.The mean age of the patients was 9.5 years old,ranging from 7 to 12 years old.Lateral cephalometric radiograph was taken before and after the treatments and analyzed.The data was analyzed by paired t test with SPSS17.0 software package.RESULTS： After the patients were treated with Frankel-Ⅲ appliances in mixed dentition,Sn-Ns-Si,Ns-Sn-Pos,LiSi-Sn increased,S-Ns-Si,S-Ns-Pos,LL-EP decreased with significant difference（P0.01）.S-Ns-Sn,LsSn-Sn,Sn-Me,Ns-Me,Ul-EP increased with significant difference（P0.05）.CONCLUSIONS： All findings indicate that functional Angle Class Ⅲ malocclusion can be corrected with Frankel-Ⅲ appliances.The relationship among nose,upper lip,lower lip and chin become harmonious after treatment.The maxillary and mandibular soft tissue changes are distinct and soft tissue profile changes from Class Ⅲ to ClassⅠ.