title: Absence of all permanent second molars.
authors.affiliation: Dental Department, Jing An District Central Hospital, Shanghai, People's Republic of China.
authors.forename: Z M
authors.initials: ZM
authors.lastname: Tian
mesh_terms: D000293:Adolescent; D000848:Anodontia / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008963:Molar; D011859:Radiography