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采油三厂６４０名中学生口腔调查柴养倬长庆石油湛探局采油三厂职工医院（７５１５０６）１９９２－１０调查我厂６４０名中学生口腔，采用卫生部１９８２年＂全国中小学生龋病牙周病流行病学调查方案＂。年龄１１～１９岁，结果见表１、２。表１６４０名中学生各组恒牙患...
Oil Production Plant 640 Secondary School Oral Investigation Chai Yang Yang Changyan Petroleum Cham exploration Bureau Third Oil Factory Workers Hospital (751506) 1992-10 survey 640 high school students mouth, the Ministry of Health 1982 “National primary and secondary caries periodontal disease Epidemiological survey program. ” Age 11 to 19 years old, the results shown in Table 1,2. Table 1640 high school students in each group permanent teeth suffering from ...