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Significant Correlations Between Gingival Scores and Ascorbic Acid Status

Three-hundred forty-one healthy young adult males were studied after all had been on the same dietary regimen for three weeks. A control fasting blood sample was drawn at 7:30 AM. Urine then was force-voided and discarded. An intravenous dose of 500 mg ascorbic acid was administered and a urine sample was collected four hours after drug administration. A gingival score of zero to three was assigned to each individual based on an examination developed by O'Leary et al (Periodontics 1:167-174, 1963). Whole blood ascorbic acid concentration was measured by the dinitrophenylhydrazine procedure (KNox and GOSWAMI, Adv Clin Chem 4:121-205, 1961) after protein precipitation and the urine level were determined in the same manner after a 1:5 dilution. The mean gingival score for all participants was 2.47 (standard deviation, 0.57). When the participants were separated into six groups based on gingival scores, the range of the means was only 2.31 to 2.58. Thus, there was a narrow range of gingival status in these 341 individuals. The mean for fasting whole blood ascorbic acid for all 341 participants was 1.08 mg/100 ml (SD, 0.24). Means for the six gingival score groups ranged from 1.03 mg/100 ml (SD, 0.22) to 1.13 mg/100 ml (SD, 0.22). The correlation coefficient between gingival score and blood