近二十年研究表明,菌斑是牙周炎的主要原因。细菌是牙周病发生的始动因子。因此对牙周病治疗后细菌动态的观察是临床医生关心的问题。国内外学者对牙周细菌的种类、分布、致病性以及牙周菌斑进行了大量的研究工作,发现口腔厌氧菌感染率很高,牙周脓肿厌氧感染率高达80～100%。但由于对厌氧 Nearly two decades of studies have shown that plaque is the main cause of periodontitis. Bacteria are the initiators of periodontal disease. Therefore, the observation of bacterial dynamics after periodontal disease treatment is a clinician's concern. Domestic and foreign scholars have carried out a large amount of research work on the types, distribution, pathogenicity and periodontal plaque of periodontal bacteria and found that the infection rate of oral anaerobic bacteria is high, and the anaerobic infection rate of periodontal abscess reaches 80-100%. But due to anaerobic