Abstract
Since it is generally known that in many cases immunity to dental caries is apparently inherited, it was considered possible that this immunity or, conversely, great susceptibility might be linked with the blood group of the individual. To test this possibility bloods from a number of individuals with a history of freedom from decay and shown by dental examination to have absolutely no caries were typed. Another group of individuals in whom caries was very active and extensive was studied in the same manner.
The grouping was done in the usual way by testing the cells of the blood in question with known O, A and B sera, and the serum against known A and B cells. The tests were carried out macroscopically on a glass plate.
The distribution of the blood types in each group of cases is shown in the table.
It is obvious that there is no significant difference between the distribution of blood types in the 2 groups of individuals.
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