Mann J, Cormier P P, Green P, Ram C A, Miller M F, Ship I I
Community Dent Oral Epidemiol. 1981 Jun;9(3):135-41. doi: 10.1111/j.1600-0528.1981.tb01044.x.
Loss of attachment as measured by a portion of Ramfjord's Index (PDI) was determined in 383, 12-16-year-old schoolchildren in rural Juniata County, PA. Prevalence and distributions were tabulated for sex, last dental visit, and type of treatment received. Dental knowledge test scores, toothbrushing effectiveness periodontal status and oral cleanliness were determined at annual intervals from Spring '75 to Spring'79. Mean scores were contrasted with bone loss measurements. 47.3% had loss of attachment (greater than 1 mm) including 24.5% with 2mm or more of attachment loss per mouth. Females (41.0%) ahd significantly lower prevalence rates than males (52.7%). Students who visited a dentist in the last 6 months and who received scaling had less bone loss, lower GI, PII, PI, and QHI scores. An inverse relationship was found between dental knowledge and the other variables measured. Similar patterns were seen with high, medium and low bone loss groups. Many variables in this study were associated with bone loss, including: plaque, dental knowledge, dental behavior (toothbrushing and visiting a dental clinic), recent treatment received and sex. None appeared more significant than the others.
通过部分拉姆斯福德指数（PDI）测量的附着丧失情况，在宾夕法尼亚州朱尼亚塔县农村地区的383名12至16岁学童中进行了测定。按性别、上次看牙时间和接受的治疗类型列出了患病率和分布情况。从1975年春季到1979年春季，每年测定牙科知识测试分数、刷牙效果、牙周状况和口腔清洁度。将平均分数与骨质流失测量值进行对比。47.3%的人有附着丧失（大于1毫米），其中每口有2毫米或更多附着丧失的占24.5%。女性（41.0%）的患病率明显低于男性（52.7%）。在过去6个月看过牙医并接受过洗牙的学生骨质流失较少，牙龈指数（GI）、菌斑指数（PII）、牙石指数（PI）和口腔卫生指数（QHI）得分较低。在牙科知识与所测量的其他变量之间发现了负相关关系。高、中、低骨质流失组呈现出相似的模式。本研究中的许多变量都与骨质流失有关，包括：牙菌斑、牙科知识、牙科行为（刷牙和看牙科诊所）、最近接受的治疗和性别。没有一个变量显得比其他变量更显著。
