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目的探讨早期应用Twinblock矫治器治疗安氏Ⅱ~1错后前后牙面软硬组织的变化。方法对10例应用Twinblock治疗前后的10～13岁安氏Ⅱ~1错患者,据X线头颅侧位片分析治疗前后软硬组织的变化。结果矫治后的硬组织改变主要为SNB角的增大和ANB角的减小。提示下颌骨的生长,面角增加和颌突角减小,上牙轻度内收和下前牙少量唇倾,反映出软组织侧貌突度的减小。结论对安氏Ⅱ~1错病例早期应用Twinblock能够产生下颌骨的骨骼改变,并达到相应的软组织侧貌美观改善。
Objective To investigate the changes of the hard and soft tissues before and after the treatment of Angle Ⅱ ~ 1 malocclusion with Twinblock appliance. Methods Ten cases of patients with Angle Ⅱ ~ 1 malformation before and after treatment with Twinblock were treated with X-ray cephalometric analysis before and after treatment. Results The main changes of hard tissue after the treatment were the increase of SNB angle and the decrease of ANB angle. Prompted mandibular growth, increased face angle and jaw angle decreased, the upper adductor adduction and a small amount of lip anterior lip, reflecting the reduction of soft tissue profile. Conclusion The early application of Twinblock to the patients with Angle Ⅱ ~ 1 malformations can produce skeletal changes of the mandible and achieve the corresponding aesthetic appearance improvement of soft tissue.