title: Relationship of gingival calculus and bleeding on probing in CPITN code 2 sextants.
abstract: The aims of this study were twofold: firstly, to evaluate the relationship of supra- or subgingival calculus and bleeding on probing (BOP) in sextants coded 2 in the Community Periodontal Index of Treatment Needs (CPITN); and secondly, to compare the differences in four investigations in Taiwan, Hong Kong, Japan and Norway. In a national survey, a total of 2658 Chinese dentate adults were examined by using modified CPITN in the Taiwan area from 1985 to 1987. Sextants given Code 2 were divided into four subclassifications: supragingival calculus with bleeding (I+), supragingival calculus without bleeding (I-), subgingival calculus with bleeding (II+) and subgingival calculus without bleeding (II-). The results showed that of the 9394 sextants given Code 2, the highest percentage (70%) were characterized by the presence of subgingival calculus with bleeding and the lowest percentage (4%) by supragingival calculus with bleeding. The ratio of sextants coded 2 with only supragingival calculus versus subgingival was 1:6.2. The bleeding to nonbleeding ratio of sextants coded 2 in this study was similar to the Hong Kong study. However, differences among Taiwan, Japan and Norway were found. The results indicated that sextants with subgingival calculus had a higher tendency to BOP, with a ratio of 4:1. Those with supragingival calculus had a ratio of 3:7. We conclude therefore, that it is essential to scale teeth to remove subgingival calculus for determination of the necessity of periodontal treatment.
authors: Department of Dentistry, Tri-Service General Hospital and School of Dentistry, National Defense Medical Center, Taipei, Taiwan, R.O.C.
authors: Y J
authors: YJ
authors: Dong
authors: M M
authors: MM
authors: Lee
authors: L
authors: L
authors: Pai
authors: T K
authors: TK
authors: Peng
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016009:Chi-Square Distribution; D003728:Dental Calculus / Q000150:complications* / Q000453:epidemiology; D012534:Dental Scaling; D005260:Female; D005884:Gingival Hemorrhage / Q000453:epidemiology / Q000209:etiology*; D006301:Health Services Needs and Demand; D006723:Hong Kong / Q000453:epidemiology; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009664:Norway / Q000453:epidemiology; D015588:Observer Variation; D010512:Periodontal Index; D015203:Reproducibility of Results; D012423:Rural Health; D013624:Taiwan / Q000453:epidemiology; D014504:Urban Health