Periodontal disease prevalence in different age groups in Japan as assessed according to the CPITN

Miyazaki H, Hanada N, Andoh MI, Yamashita Y, Saito T, Sogame A, Goto K, Shirahama R, Takehara T. Periodontal disease prevalence in different age groups in Japan as assessed according to the CPITN. Community Dent Oral Epidemiol. 1989; 17(2): 71-4.