Takahashi Y, Okawa Y, Matsukubo T, Takaesu Y, Sasaki Y, Ishii T
Tokyo Dental College, Chiba 260, Japan.
Dent Jpn (Tokyo). 1990;27(1):155-60.
The influence of plaque and calculus deposition on the prevalence of pocket formation was studied using cross-sectional data from 615 Japanese manual workers aged 18-49. A periodontal pocket with a depth of 4 mm or more from gingival margin to bottom of the pocket was coded as presence of pockets. The oral hygiene status at the specified site was classified into four hygiene patterns as no deposition, deposition of plaque only, deposition of calculus only and deposition of both plaque and calculus. The percentages of six specified tooth types with pocket formation were analyzed according to the local hygiene condition. The results indicate that local oral hygiene produces significant differences in the proportion of teeth with pocket formation in the examined tooth types. The frequency of site-specific hygiene condition were no deposition, deposition of plaque only and deposition of both plaque and calculus, except for the lower central incisors. The teeth without plaque and calculus show no pocket formation in most of the examined tooth types in the subjects aged 18-39, while teeth with plaque and/or calculus indicate high prevalence of pocket formation. It is also revealed that the teeth with both plaque and calculus tend to show higher percentages of pocket formation than those with plaque only. These findings suggest that promotion of a plaque free state would reduce risk for pocket formation to negligible level, and that calculus deposition increase the risk for pocket formation around the teeth with plaque.
利用来自615名年龄在18 - 49岁的日本体力劳动者的横断面数据，研究了牙菌斑和牙结石沉积对牙周袋形成患病率的影响。从牙龈边缘到牙周袋底部深度为4毫米或更深的牙周袋被编码为存在牙周袋。指定部位的口腔卫生状况分为四种卫生模式：无沉积、仅牙菌斑沉积、仅牙结石沉积以及牙菌斑和牙结石均沉积。根据局部卫生状况分析了六种指定牙型出现牙周袋形成的百分比。结果表明，局部口腔卫生状况在被检查牙型中出现牙周袋形成的牙齿比例上产生了显著差异。特定部位卫生状况的频率为无沉积、仅牙菌斑沉积以及牙菌斑和牙结石均沉积，但下颌中切牙除外。在18 - 39岁的受试者中，大多数被检查牙型中无牙菌斑和牙结石的牙齿未出现牙周袋形成，而有牙菌斑和/或牙结石的牙齿表明牙周袋形成的患病率较高。还发现，既有牙菌斑又有牙结石的牙齿相比仅有牙菌斑的牙齿，牙周袋形成的百分比往往更高。这些发现表明，促进无牙菌斑状态将把牙周袋形成的风险降低到可忽略不计的水平，并且牙结石沉积会增加有牙菌斑牙齿周围牙周袋形成的风险。
