Methods: Samples of subgingival plaque were detected for Aa distribution by oligonucleotide probe from 60 sites of CP patients and 10 healthy sites of healthy people.

• 方法：利用合成的寡核苷酸探针对60例慢性牙周炎患者60患病位点、10例健康人的10个对照位点龈下菌斑中伴放线菌放线杆菌进行检测。