单纯性牙周炎又称边缘性牙周炎，是牙周病中最常见的一种，成年人患病较多，年龄越大，本病的发病越高，其病情也随年龄增长而趋严重，治疗难度也随之加大，1994年来我院应用灭滴灵药膜治疗单纯性牙周炎，经临床观察疗效满意。1资料与方法11观察对象与分组，对83例诊断为中度以 Simple periodontitis, also known as marginal periodontitis, is the most common form of periodontal disease. Adults are more afflicted. The older the disease, the higher the incidence of the disease also increases with age Serious, the difficulty of treatment also will be increased in 1994 to our hospital metronidazole membrane treatment of simple periodontitis, the clinical observation of satisfactory results. 1 Materials and Methods 11 subjects and sub-group, 83 cases were diagnosed as moderate