【名词&注释】
慢性牙周炎(chronic periodontitis)、宣传教育(propaganda and education)、转移性骨肿瘤(metastatic bone cancer)、建立健全(establishing and perfecting)、侵袭性牙周炎(aggressive periodontitis)、慢性胃溃疡(chronic gastric ulcer)、艾滋病防治(aids prevention and control)、牙周脓肿(periodontal abscess)、辐射状(radialized)、胃溃疡恶变(malignant change of gastric ulcer)
[单选题]单个牙窄而深的局限性牙周袋常见于
A. 慢性牙周炎
B. 牙周牙髓联合病变
C. 侵袭性牙周炎
D. 牙周脓肿(periodontal abscess)
E. 慢性龈炎