Gum disease is the most common. It affects around 68% of adults over 65, and it progresses quietly. By the time it is obvious enough to cause pain, it has usually been developing for a long time.
Root decay follows closely behind. As gums recede with age, the root surfaces of teeth become exposed. Those surfaces are not protected by enamel the way the crown of a tooth is, which makes them significantly more vulnerable to decay. Add dry mouth from medication into the equation and the conditions become ideal for bacteria.
The dry mouth connection is one that families often miss entirely. It does not seem like a dental problem. Your parent mentions they feel thirsty, or they have trouble swallowing certain foods, and no one thinks to connect it to their teeth. But saliva is the mouth’s natural defence. Without it, decay can move faster than it would in a much younger person.
Tooth loss is the downstream consequence of these problems left unmanaged. It affects nutrition, because people naturally avoid foods that are difficult to chew. It affects confidence. And it creates a feedback loop, because missing teeth alter how remaining teeth bear the load, which creates new problems over time.
For those who already wear dentures, the work is not finished. Dentures that fit well when they were made may not fit as well a few years later. Bone and gum tissue change shape, slowly and continuously. Sores, infections, and poor fit can all develop without being immediately obvious to the person wearing them.
Oral cancer screening is also part of a routine dental exam, and this matters more with age. The risk increases over time and early detection makes an enormous difference.
Prevention remains highly effective, even at 80. Daily brushing with fluoride toothpaste, regular professional cleanings, managing dry mouth with water and sugar-free products, and keeping up with scheduled dental appointments all reduce risk significantly. Electric toothbrushes with wider handles are worth considering for any parent with arthritis or reduced grip strength.
The families who tend to fare best are the ones who never let the visits lapse, even when their parent seemed fine. It is not that something bad always happens when you skip. It is that when it does happen, the gap in care tends to show up in the same conversation.