amount of plaque, but instead the composition of bacterias within the plaque in a hi, this is tom gallagher. the results were, we know that our ancestors had huge black build ups and didn't brush their teeth yet they still had healthy teeth. despite that 98 percent of germans experienced dental cavities, 90 percent ginger vitus or inflame gums, and 50 percent of middle aged adult experienced periodontitis. so what's going wrong? slightly attrition. johan villa from the university clinic fryeburg wants to get to the root of the weight. what we need influences the health of our gums especially periodontitis. so he initiated a study with that as its focus as event, but stop them. also. we already have data from university, as in maryland, zurich had people who didn't brush their teeth for 4 weeks, but consumed a diet similar to in the stone age, had more plaque awesome, but much less inflammation of india. so that's what we aim to study more closely. the test group ain't a diet similar to those in the stone age, complex carbohydrates from fruit and vegetable, healthy fats from nuts and seeds,