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用磁场影响牙结石重新附着可降低缘龈炎的复发率。实验组与对照组相比，治疗３个月后的疗效有显著差异，治疗６个月后有非常显著差异。
Magnetic attachment of dental calculus can reduce the recurrence rate of gingivitis. The experimental group compared with the control group, the efficacy of 3 months after treatment were significantly different, 6 months after treatment there are very significant differences.