方法：对52例慢性牙周炎患者的1453颗牙进行龈下刮治及根面平整术，随访3个月。
METHODS: 1453 teeth of 52 patients with chronic periodontitis were given scaling and root-planing procedures.
方法：对52例慢性牙周炎患者的1453颗牙进行龈下刮治及根面平整术，随访3个月。
METHODS: 1453 teeth of 52 patients with chronic periodontitis were given scaling and root-planing procedures.
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