| risk indicators for periodontal diseases in guatemalan adolescents. | a random sample of sixty-two 11-15-year-old adolescents from 17 different locations in guatemala were selected for this study. pocket depth, plaque index, and bleeding upon probing were recorded from 6 randomly selected sites in each subject (a total of 372 sites). subgingival plaque samples were subsequently collected from these sites and processed by several assays. for cost reasons, in each pair of sites different assays were performed as follows: sites #1, #2--bana test for t. denticola, p. ... | 2000 | 11210274 |