Plaque was removed from the teeth of 2 monkeys which had been fed on a standard cariogenic diet. They were then fed entirely by stomach tube for a 7-day period. Tube feeding was continued for a further such period during which 1 animal was given glucose and the other sucrose by mouth. In a final 7-day period the 2 sugars were interchanged between the monkeys while all the other dietary constituents continued to be given by tube. Plaque samples were taken at the end of each period, hydrolysed and subjected to quantitative amino acid analysis. The percentage of total protein in the plaque was maintained during tube feeding and enhanced when additional sugar was given by mouth. The protein of the various plaque samples was fairly constant in composition and conformed to a definite pattern with fairly high proportions of glutamic acid and alanine and moderate amounts of many amino acids. This composition closely resembled that of plaque from human teeth. It was concluded that salivary proteins rather than newly-ingested food are the main immediate source of the entire protein content of dental plaque.

Keywords:
Diet, cariogenic, Monkeys, Plaque biochemistry, Saliva
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© 1971 S. Karger AG, Basel
1971
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