摘要
目的 :探讨磁力在固定正畸中关闭牙间隙的临床疗效 ,并与机械力进行比较研究。方法 :将 1 6名病例在年龄、性别、牙颌特征方面仔细搭配 ,分成磁力组和机械力组。分别用钕铁硼 ( Nd2 Fe4B)永磁体和橡皮圈 ,在 Edgewise矫正技术中拉尖牙远中移动进行关闭牙间隙的临床对比研究。结果 :磁力组牙间隙关闭速度明显大于机械力组 ,两组差异显著 ( P<0 .0 1 ) ;两组尖牙根长治疗前后均无显著变化 ( P>0 .0 5) ;ME组头发微量元素质治疗前后无显著差异( P>0 .0 5)。结论 :磁力在固定矫治装置上关闭牙间隙是可行的并优于机械力 ;钕铁硼永磁体在临床应用中具有生物安全性。
To evaluate the effects of magnetic and mechanical force in closing diastemata in fixed orthodontia. Metheds:The sixteen cases were divided into two groups treated with magnetic and mechanical methods respectively They were careful arranged according to age,sex and dental-maxillary feature NdFeB magnet and elastic ring were used to move canine distal to close diastemata in fixed orthodontia Results:In the magnet-treated grorp,the speed of closing diastemas closing was obviously faster than that in the mechanically treated group( P <0 01) The length of canine fang in the two group and the results of hair micro element analysis in the magnet-treated group have no significant difference before and after treatrnent( P >0 05) Conclusion:The feasibility of magnetic force in closing diastemata in fixed orthodontia is undoubtful and it is more advanced than using mechanica force Clinical trcatment with magnet in orthodontia is safe.
出处
《锦州医学院学报》
2000年第6期19-22,共4页
Journal of Jinzhou Medical College
