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目的分析上颌垫矫治器双曲舌簧易断原因并实验不同材料钢丝制作双曲舌簧,统计研究其折断率,提高疗效。方法实验对象按3种不同材料分组,经过统计学处理比较各组折断率差异。结果 3种不同材料对比,以德国生产的进口钢丝折断率最低、效果最好。结论上颌垫矫治器双曲舌簧用德国生产的进口钢丝折断率显著下降,疗效增强。
OBJECTIVE: To analyze the causes of the breakage of the hyperbolic reed in the maxillary ottomat and to experiment the hyperbolic reed with different materials of steel wire. The breaking rate and the curative effect were statistically investigated. Methods The subjects were divided into three groups according to different materials, and the differences of the breaking rates between groups were statistically analyzed. Results Comparison of three different materials, the lowest breaking rate of imported steel wire produced in Germany, the best results. Conclusion The maxillary pad appliance hyperbolic reed wire made by Germany imported wire broken rate dropped significantly, the effect is enhanced.