Periodontitis is a serious gum infection that damages the soft tissue damages bone that supports teeth. Periodontitis will cause teeth to loosen or cause tooth loss.
Periodontitis is common but largely preventable. It's usually the result of poor oral hygiene.
Brushing a minimum of doubly on a daily basis, flossing daily and getting regular dental check ups can greatly improve your chances of successful treatment for periodontitis and can also reduce your chance of developing it.