Plaque causes gum disease. It’s the layer of bacteria that forms on teeth every time you eat, and it’s particularly prevalent after the consumption of food. The bacteria in plaque produces acids after you eat and drink, and failing to regularly remove it results in gum disease. Whilst brushing and flossing is vital for keeping gum disease at bay, even the most diligent brushers and flossers will gradually develop some degree of plaque. For this reason, hygienist appointments are key.