Methods: 9 aged patients with defected dentitions were treated by SDA and their wearing period were from 3 to 26 months.
方法：对象为采用SDA治疗法修复的9例牙列缺损的中老年患者，戴牙时间范围为3 ~26个月。
Methods: 9 aged patients with defected dentitions were treated by SDA and their wearing period were from 3 to 26 months.
方法：对象为采用SDA治疗法修复的9例牙列缺损的中老年患者，戴牙时间范围为3 ~26个月。
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