论文部分内容阅读
目的:探讨Twinblock治疗恒牙早期安氏Ⅱ类1分类错的机理。方法;选20例11～13岁的恒牙早期安氏Ⅱ类1分类错患者,依生长发育期分为高峰期和高峰后期两组,应用Twinblock矫治器治疗,对治疗前后头颅定位侧位片进行测量分析。结果:20例患者磨牙关系得到改善,前牙覆颌覆盖减小。高峰期组SNB增大,Co-Go、Go-Gn、Co-Gn均增大,差异有显著性,高峰后期组L1-MP增大,差异有显著性,下颌平面角无明显变化。结论:Twinblock治疗恒牙早期安氏Ⅱ类1分类错,生长高峰期患者以骨性改变为主,高峰后期患者以牙性改变为主。
OBJECTIVE: To investigate the mechanism of Twinblock in the treatment of early Class Ⅱ Division 1 malocclusion in permanent teeth. Methods Twenty patients aged from 11 to 13 years old with early Class Ⅱ malocclusion were enrolled in this study. They were divided into two groups according to their growth and development periods: Twinblock appliance, Tablet for measurement and analysis. Results: The molar relationship was improved in 20 patients, and the coverage of anterior mandibular jaw reduced. In the peak group, SNB increased, Co-Go, Go-Gn and Co-Gn increased, the difference was significant. In the late peak group, the L1-MP increased, the difference was significant, but the mandibular plane angle had no significant change. Conclusion: Twinblock was used to treat Class Ⅱ division 1 malocclusion in the early stage of permanent dentition. Osteopontin was the predominant peak in patients with peak growth and mainly in the late peak.