牙菌斑生物膜是牙周炎的始动因子。研究发现,牙周炎与全身多器官或系统的感染性疾病有关,如心脑血管疾病、糖尿病、消化道和呼吸道疾病。近年来,牙周炎与呼吸道疾病之间的关系备受关注,本文将近期对牙周可疑致病菌感染下呼吸道的途径及其作用研究做简要综述。 Dental plaque biofilm is the initiating factor of periodontitis. The study found that periodontitis and systemic multiple organ or system of infectious diseases, such as cardiovascular and cerebrovascular diseases, diabetes, gastrointestinal and respiratory diseases. In recent years, the relationship between periodontitis and respiratory diseases has drawn much attention. In this paper, we briefly reviewed the pathways and their roles of suspected pathogenic bacteria in the lower respiratory tract during periodontal infection.