Methods: 22 patients with chronic periodontitis were enrolled in a 9-month maintenance care program after non-surgical periodontal therapy.
方法：对牙周非手术基础治疗后进入维护治疗期的22名慢性牙周炎患者进行9个月的纵向观察。
Methods: 22 patients with chronic periodontitis were enrolled in a 9-month maintenance care program after non-surgical periodontal therapy.
方法：对牙周非手术基础治疗后进入维护治疗期的22名慢性牙周炎患者进行9个月的纵向观察。
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