It is not a given that we must lose teeth as we age. If we maintain good oral hygiene and have regular professional cleanings and oral examinations, chances are we can keep our natural teeth for life. That involves not only caring for the teeth themselves, but also the structures that surround them: the gums and tooth-supporting bone. Gum disease, which is a bacterial infection, threatens these supporting tissues. That is why dental professionals are always on the lookout for early signs that patients may not notice. When signs of trouble become apparent, periodontal therapy may be suggested.