title: Problems and future approaches for assessment of periodontal disease.
authors.affiliation: Division of Community Oral Health Development, Kyushu Dental University , Kitakyushu , Japan.
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Ansai
authors.affiliation: Division of Community Oral Health Development, Kyushu Dental University , Kitakyushu , Japan.
authors.forename: Shuji
authors.initials: S
authors.lastname: Awano
authors.affiliation: Division of Community Oral Health Development, Kyushu Dental University , Kitakyushu , Japan.
authors.forename: Inho
authors.initials: I
authors.lastname: Soh
keywords: bleeding from gingiva; epidemiology; periodontal disease; probing; questionnaire