本文就牙周感染的特点，牙周医学的概念及牙周病与全身系统性疾病间的相互关系进行综合阐述。
In this paper, the character of periodontal infection, the conception of periodontal medicine and the relationship between periodontal diseases and systemic diseases were summarized.
所有选取的对象均无全身系统性疾病、无颌面部手术史及放、化疗史、无中、重度牙周炎及明显的口腔黏膜病。
None of these selected objects had the systemic disease, a history of maxillofacial surgery and radiotherapy and chemotherapy, moderate or severe periodontitis and significant oral mucosal disease.
系统性红斑狼疮是一种累及全身多系统、多器官的自身免疫性疾病，临床表现多种多样。
Systemic lupus erythematosus is an autoimmune disease involving multi-organ and multiple systems with a variety of clinical manifestations.
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