About 60% of adults 65 and older have gum disease, by the CDC's measurement: past retirement age it is the statistical norm rather than the exception.1 In a five-year NIH-funded study of adults 65 and older, those who reported flossing lost about one tooth over the period while non-flossers lost about four, an association, with flossing self-reported.2
How common is gum disease after 65?
By the CDC's own measurement, about 60% of adults 65 and older have gum disease.1 Read that again: past retirement age, gum disease isn't a minority problem; it's the statistical norm. The slow, mostly painless accumulation of gum inflammation over decades catches up with most people eventually.
And keeping natural teeth in later life is not a cosmetic concern. Teeth are how you eat a varied diet, speak clearly, and smile without thinking about it. Every natural tooth kept is a bridge, denture, or implant never needed. Which raises the obvious question: among older adults, who actually keeps their teeth?
Who actually keeps their teeth?
One of the clearest answers comes from an NIH-funded study published in the Journal of Dental Research, which followed a group of adults 65 and older for five years (average age about 73) and compared the people who flossed with the people who didn't.2
Over five years, the flossers lost about one tooth. The non-flossers lost about four.
The flossers in the study also averaged roughly three fewer missing teeth overall, and had measurably less gum disease between their teeth. The honest caveats travel with the finding: flossing was self-reported, and this is an association from an observational study, so it can't prove that flossing alone caused the difference, even after the researchers adjusted for age, diabetes, smoking, brushing, and dental visits. But as a long-term look at real older adults over real years, it's about as direct as the evidence gets, and we unpack the whole study in flossers keep more teeth.
What actually changes in an aging mouth?
Age itself isn't the enemy, but several things that come with age quietly raise the difficulty level of oral care. Dental and public-health guidance consistently points to the same handful:
Medications and dry mouth. Many common prescriptions (for blood pressure, mood, allergies, and more) reduce saliva as a side effect. Saliva is the mouth's built-in defense system, constantly rinsing away food and buffering acids. Less of it means plaque and decay get an easier run, through no fault of the person's habits.
Receding gums and root-surface decay. As gums recede over the years, they expose the roots of teeth: surfaces that lack the hard enamel coating of the crown and decay more easily. This is why cavities in older adults often show up at the gumline, in mouths that went decades without one.
Dexterity changes. Arthritis, tremor, or simply stiffer hands can make the fine motor work of traditional string flossing genuinely difficult. Guidance for older adults emphasizes finding tools and techniques that fit the hands you have now, because the between-the-teeth cleaning still has to happen, one way or another. We cover the practical options in oral care for seniors.
What happens to dental coverage at 65?
There's a structural trap waiting at 65 that surprises many people: traditional Medicare doesn't cover most routine dental care: exams, cleanings, fillings, dentures.3 For a lot of Americans, the moment they leave employer coverage is the moment dental insurance gets thinner, precisely when gum disease prevalence peaks and dry mouth, root decay, and dexterity challenges are stacking up.
That makes the economics of prevention sharpest in exactly this stage of life, and in insurance claims data, treated gum disease has been associated with lower medical costs. When professional care may cost more out of pocket, the two-dollar habits (thorough brushing, daily cleaning between the teeth, and keeping regular checkups anyway) do more of the heavy lifting. The five-year study above is worth holding onto here: the difference between the flossers and the non-flossers wasn't exotic treatment. It was a daily habit, sustained across years, associated with three fewer missing teeth.
The mouth you have at 75 is largely built by what you do at 55, 60, and 65. The data on older adults doesn't say it's ever too late to start; it says the people who kept going kept more of their teeth.
Common questions
Is it too late to start flossing in your sixties or seventies?
The evidence on older adults doesn't suggest that. The five-year study behind the tooth-loss figures followed adults who were already 65 and older, at an average age of about 73, and the difference between flossers and non-flossers showed up within that window.2 Flossing was self-reported and the findings are associations rather than proven causation, but they describe people starting from exactly that age. The full study is in flossers keep more teeth.
Why do cavities show up at the gumline in older adults?
Because receding gums expose the roots of teeth, and root surfaces lack the hard enamel coating that protects the crown, so they decay more easily. That's why decay often appears at the gumline in mouths that went decades without a cavity. Dry mouth from common medications compounds it, since less saliva means less rinsing of food and less buffering of acids.
What if arthritis or shaky hands make flossing difficult?
Change the tool, not the goal. Arthritis, tremor, or simply stiffer hands can make the fine motor work of traditional string flossing genuinely difficult, and guidance for older adults emphasizes finding tools and techniques that fit the hands you have now, because the between-the-teeth cleaning still has to happen, one way or another. The practical options are in oral care for seniors.
Does keeping natural teeth matter beyond appearance?
Yes. Teeth are how you eat a varied diet and speak clearly, and every natural tooth kept is a bridge, denture, or implant never needed. Gum disease is also the condition researchers study for its links to the rest of the body, which we map association by association in the mouth–body connection.
- Eke PI, et al. / CDC: periodontitis prevalence among US adults, NHANES 2009–2014; NIDCR data pages (2024). Approximately 60% of adults 65+ have periodontal disease.
- Marchesan JT, et al. Flossing is associated with improved oral health in older adults. Journal of Dental Research, 2020;99(9):1047–1053. PMC7375740. NIH-funded, five-year longitudinal study of adults 65+; flossing self-reported; findings are associations, not proven causation.
- U.S. Centers for Medicare & Medicaid Services: Medicare dental services coverage. medicare.gov/coverage/dental-services. Original Medicare does not cover most dental care; limited medically-linked exceptions and Medicare Advantage dental benefits exist.