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目的观察在垫矫治器基础上使用钕铁硼永磁体矫治乳牙期骨性反的效果。方法 28例乳牙期骨性反病例,应用磁力垫矫治器矫治,治疗前后头颅侧位片及常规头影测量进行分析。结果与矫治前相比,矫治后ANB角,AOBO距,NA-PA角均增大,差异有统计学意义(P<0.01)。SNB角减小,差异有统计学意义(P<0.01)。结论磁力垫矫治器克服了传统矫形装置的缺点,从而能获得持续的作用力,磁力调整易于控制,便于临床开展。
Objective To observe the effect of using NdFeB permanent magnets on the correction of deciduous bony reflux on the basis of pad appliance. Methods Twenty - eight cases of deciduous period of bony agenesis were treated with magnetic force pad appliance, before and after treatment, lateral cephalograms and conventional cephalometric measurements were analyzed. Results Compared with before treatment, the ANB angle, AOBO distance and NA-PA angle increased after treatment, the difference was statistically significant (P <0.01). SNB angle decreased, the difference was statistically significant (P <0.01). Conclusion Magnetic force pad appliance overcome the shortcomings of the traditional orthopedic device, which can get a sustained force, easy to control the magnetic force adjustment, easy to carry out clinical.