Georgy S, Mann J, Anaise J Z, Brayer L
Refuat Hapeh Vehashinayim. 1979 Apr;28(2):25-8, 19-21.
The purpose of the present study was to obtain current information regarding periodontal diseases. The study was conducted in Israel among ninth to twelth grade students, 14 to 18 years of age, residing in Jerusalem, Tel Aviv and Ramat Gan. A total of 725 school children were examined. During the examination only periodontal status was checked. Periodontal status was recorded according to Russell's Periodontal Index (PI). The mean PI found was 0.52. The results indicate an increase in the mean PI with age. Significant difference was found in the mean PI values between girls and boys. Girls constantly scored lower mean PI values than boys. No significant differences were found in the mean PI scores when studied according to country of origin.
本研究的目的是获取有关牙周疾病的当前信息。该研究在以色列耶路撒冷、特拉维夫和拉马特甘的9至12年级、年龄在14至18岁的学生中进行。总共检查了725名学童。检查期间仅检查了牙周状况。牙周状况根据罗素牙周指数（PI）进行记录。发现的平均PI为0.52。结果表明平均PI随年龄增加。女孩和男孩的平均PI值存在显著差异。女孩的平均PI值一直低于男孩。根据原籍国进行研究时，平均PI得分没有发现显著差异。
