【摘要】 目的:研究应用改良的双阻板矫治器(Twinblock)联合前方牵引对不同年龄组的安氏Ⅲ类错软硬组织的作用。方法:选择安氏Ⅲ类错患者30例。其中乳牙期15例,替牙期15例。两组均应用Twinblock联合前方牵引进行矫治。结果:两组病例矫治后SNA,SNB,ANB,A-SFH,PG-SFH均有较大变化。其中,乳牙组SNA平均增加2.32°,替牙期组增加了2.82°。在垂直向上,替牙组前下面高增加,SN-MP增加了2.64°。反映牙性改变的指标显示在乳牙组变化不大,而替牙组UI-SN、LI-mp均有增加。结论:改良的Twinblock联合前方牵引适应于乳牙期和替牙早期的功能性反,或伴有上颌发育不足的轻中度骨性反。但对于高角病例或存在Tmj症状的患者应慎用。更多还原

【Abstract】 Objective:To investigate the soft and hard tissue changes of class patients treated with the modified Twinblock appliance combine maxillary protraction.Methods:Thirty patients were divided into primary dentition group and mixed dentition groups.All patients were treated with the modified Twinblock appliance combine maxillary protraction.Cephalometric analysis were performed with all patients before and after.Results:The statistical analysis showed that SNA,SNB,ANB,A-SFH,PG-SFH of primary dentition and mixed dentition group had significent changes.SNA of primary dentition increased by 2.32°.In mixed dentition group inceased by 2.82°.There were also significent inceased in MP-SN,inmixed dentition group inceased by 2.64°.The change of UI-SN、LI-mp in pramiry dention group had no great change.Conclusion:The modified Twinblock appliance combine maxillary protraction can be used Angle Ⅲ malocclusion in primary dentition and early mixed dentition.But it can not be used in hypodivergent patients and temporomandibular joint dysfunction.更多还原