The samples are gathered for 3 times from supragingival dental plaque on all teeth except mandibular anterior teeth.
共采集菌斑3次，取除下颌前牙以外的所有牙面的龈上菌斑。
The detection rates for Pg in molars were much higher than those in incisors, and the presence of Pg and Aa in supragingival plaque was related to periodontal parameters.
两菌种检出率随年龄增长而增加，且与牙周临床指标密切相关，儿童早期采取牙周病的预防措施是非常必要的。
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