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在1985年初,我们普查了大连医学院在校学生625名的龋齿,调查了口腔卫生习惯,并选择典型龋齿病例和健康对照组,做了唾液成分分析,以了解其间关系。调查对象的年龄范围为16～24岁。唾液是在早晨刚起床时采取无刺激全唾液10分钟。判断流速后立即测PH,然后
In early 1985, we surveyed 625 dental caries students from Dalian Medical College, investigated oral hygiene habits, and selected typical cases of dental caries and healthy control group, did a salivary component analysis to understand the relationship between. The survey's age range is 16 to 24 years. Saliva is taken for 10 minutes without stimulating whole saliva just after getting up in the morning. Immediately after determining the flow rate measured PH, then