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由40例80个牙位的青少年牙周炎患者(实验组)的龈下菌斑标本中分离出小齿密螺旋体19株(包括3株口腔螺旋体),大齿密螺旋体4株,疏螺旋体4株,梭形杆菌21株.而40例80个牙位的口腔系学生(对照组)的牙周袋及龈沟标本中,仅分离出螺旋体2株及梭形杆菌3株,两者之间差异有高度显著性.说明青少年牙周炎与螺旋体和梭形杆菌的感染关系非常密切.并对分离出的菌株进行了常用抗菌素的药敏试验.
Nineteen (including three strains) of Helicobacter pyroli were isolated from subgingival plaque specimens from 40 patients with periodontitis of 80 teeth (experimental group), 4 strains of Treponema pallidum and Borrelia 4 Strains and 21 strains of Fusobacterium, while only 40 strains of oral cavity pups in 80 teeth (control group) and gingival sulcus specimens, only 2 strains of spirochetes and 3 strains of Fusobacterium were isolated, The difference was highly significant, indicating that juvenile periodontitis was closely related to the infection of spirochetes and Fusobacterium.And the susceptibility tests of commonly used antibiotics were carried out on the isolated strains.