[The x-ray examination of periodontium].
Xie
J X
JX
Zou
Z J
ZJ
Cao
C F
CF
D006801:Humans; D010510:Periodontal Diseases / Q000000981:diagnostic imaging*; D010514:Periodontal Pocket / Q000000981:diagnostic imaging; D010519:Periodontium / Q000000981:diagnostic imaging*; D011859:Radiography