Two stages, one line between them. Plaque builds at the gumline and the immune system treats it as a wound: red, puffy gums that bleed easily. That's gingivitis, and it clears fast. In a susceptible third of people the bacteria below the gum turn destructive and eat away the bone anchoring the tooth. That's periodontitis, and it doesn't come back. Crossing that line depends on smoking, blood sugar, and genes more than on how dirty your mouth looks.

Half the adult population has active gum inflammation right now, and most don't know, because it's silent and nobody has measured their gums ¹. Adults with periodontal disease carry about 22% higher cardiovascular risk and all-cause mortality, rising toward 40% for the severe form ^{2 3}. The gum-heart link is a strong association, not a proven cause ⁴.

Diabetics get the one benefit with real trials behind it. Treating gum disease drops HbA1c about half a point, on the order of adding a second glucose pill ⁵.

Two parts, and skipping either is how people lose this: a daily routine, and a probe at the dentist.

If the bleeding hasn't stopped after three weeks of doing this properly, you're past gingivitis and need the professional deep cleaning (scaling and root planing), which buys back about half a millimeter of gum attachment, enough to decide whether a tooth survives the next decade ⁹.

The sink goes clean first. Within five to seven days of cleaning properly, the pink stops; by week two the gums tighten to pale pink and morning breath fades ¹⁰. After a deep cleaning, inflammation markers like CRP fall and blood-vessel function improves by six months ¹¹. The diabetes and heart dividends compound over years you never directly notice.

Home care runs $50 to $200 a year. A cleaning is $75 to $200, usually insured; the full-mouth deep cleaning is $800 to $1,500. No insurance? A community health center or dental school clinic runs preventive care at a discount.