Correlation of Saliva Analyses with Dental Examinations of 574 Freshmen at Oregon State College

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Abstract
The results of 5 salivary analyses[long dash]pH, starch hydrolyz ing time, buffer capacity, ammonia nitrogen, and lactobacillus plate counts[long dash]were correlated with clinical findings as expressed by DMF surfaces. Highly significant correlation coefficients were found between DMF''s and starch hydrolyz ing time, and between DMF''s and lactobacillus plate counts. The positive correlation between DMFs and pH and the inverse correlation between DMFs and buffer capacity were significant. No correlation was found between DMFs and ammonia N. Intercorrelations among the analyses were calculated, using each of 10 possible combinations. The positive correlation between pH and buffer capacity was highly significant. The inverse correlation between lactobacillus counts and buffer capacity, and the positive correlations between buffer capacity and starch hydrolyzing time and between ammonia N and pH all were significant. None of the other combinations gave significant correlations.