Areas of subgingival calculus were selected from 6 freshly extracted human teeth with periodontal disease.
選取6顆新近拔除的有明顯齦下牙石的牙周病患牙.
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AIM : To observe the effect of hybrid subgingival scaling ( combining ultrasonic scaling with hand scaling ) by SEM.
目的: 超聲 齦 下刮治結合手工刮治,用掃描電鏡的方法觀察效果.
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