Gum Disease in Pets and People: What They Share
Oral health impacts the heart, liver, and kidneys in both humans and pets. Discover the clinical links between periodontal disease and systemic wellness.
Gum disease is common in adult dogs, cats and people, and it works much the same way in each: plaque bacteria below the gumline cause inflammation that destroys the tissue and bone holding the teeth. In both dogs and people, more severe gum disease has been linked with heart problems, including endocarditis, although that link has not been shown to be cause and effect. Brushing at home and professional care below the gumline matter for every member of the family.
How does gum disease develop?
Plaque, a sticky film of bacteria, builds up on the teeth every day. Left alone, it hardens into tartar. The visible tartar above the gumline is not the main problem. The damage happens below the gumline, where bacteria and the body's inflammatory response break down the gum attachment and bone. This is true in dogs, cats and people.
Because inflamed gums bleed easily, bacteria from the mouth can enter the bloodstream briefly. That is one reason researchers in both human and veterinary medicine have studied whether gum disease affects the heart.
What is endocarditis, and is it linked to gum disease?
Endocarditis is inflammation of the inner lining of the heart's chambers and valves, called the endocardium. [1] Infective endocarditis happens when bacteria settle there, often on a damaged or artificial valve.
In people, mouth bacteria are a known cause of some cases of infective endocarditis. The American Heart Association recommends preventive antibiotics before certain dental procedures only for people at the highest risk, such as those with artificial heart valves or a past episode of endocarditis, and it stresses that good daily oral health and regular dental care matter for everyone. [2]
In dogs, a study of nearly 60,000 dogs with gum disease and a matched group without it found that more severe gum disease was linked with a higher risk of later heart conditions, including endocarditis. The authors noted the study was observational. [3]
Why do pets need anesthesia for a dental cleaning?
A thorough cleaning has to reach below the gumline, and dogs and cats won't hold still for that. Veterinary dental guidelines therefore include recommendations for general anesthesia during professional cleanings. [4] People can usually have the same work done awake, with local anesthetic when needed.
What signs of mouth trouble should you watch for?
In pets:
Bad breath
Red gums or heavy tartar
Chewing on one side, dropping food or reluctance to eat
Pawing at the mouth or swelling of the face
In people:
Gums that bleed when you brush
Red, swollen or receding gums
Persistent bad breath
Loose teeth or a change in your bite
For your pet, ask your veterinarian. For yourself, see a dentist.
Where can you get your own gums checked in Jacksonville?
Our office cares for people, not pets. A comprehensive dental exam includes a full gum evaluation. For more on how gum health connects to the rest of the body, see can gum disease affect your overall health? To schedule, contact us or call 904-398-1549.
Sources
MedlinePlus (US National Library of Medicine). Endocarditis. Retrieved October 6, 2026.
Wilson WR, Gewitz M, Lockhart PB, et al. Prevention of viridans group streptococcal infective endocarditis: a scientific statement from the American Heart Association. Circulation. 2021;143(20):e963-e978. doi:10.1161/CIR.0000000000000969 (retrieved via PubMed)
Glickman LT, Glickman NW, Moore GE, Goldstein GS, Lewis HB. Evaluation of the risk of endocarditis and other cardiovascular events on the basis of the severity of periodontal disease in dogs. J Am Vet Med Assoc. 2009;234(4):486-494. doi:10.2460/javma.234.4.486 (retrieved via PubMed)
Bellows J, Berg ML, Dennis S, et al. 2019 AAHA dental care guidelines for dogs and cats. J Am Anim Hosp Assoc. 2019;55(2):49-69. doi:10.5326/JAAHA-MS-6933 (retrieved via PubMed)
About the author. CJ Henley, DMD, is a general dentist in Jacksonville whose practice focuses on cosmetic and restorative dentistry, dental implants and dental care around head and neck cancer. Meet Dr. Henley.
CJ Henley, DMD, PA · 3675 Hendricks Avenue, Jacksonville, FL 32207 · 904-398-1549
Updated October 2026.
Can Gum Disease Affect Your Overall Health?
Most of us are aware that poor dental hygiene can lead to tooth decay, gum disease and bad breath - but not brushing your teeth could also have consequences for more serious illnesses.
Gum disease is linked with several conditions elsewhere in the body, including heart disease, diabetes, some cancers and Alzheimer's disease. For most of these, the research shows the conditions tend to occur together, not that gum disease causes them. Diabetes is the clearest two-way relationship. For the others, the honest answer is that we don't yet know whether treating your gums changes your risk, so treat gum disease because it damages your mouth, and keep up your medical care for everything else.
What is gum disease?
Gum disease begins as gingivitis: gums that are red, puffy and bleed when you brush. If plaque stays under the gumline, it can progress to periodontitis, a long-term infection and inflammation that destroys the bone holding the teeth. About 4 in 10 US adults aged 30 and older have some level of periodontitis. Smoking and diabetes are two of the strongest risk factors. [1]
Because inflamed gums bleed easily, mouth bacteria can enter the bloodstream briefly during brushing or chewing. That, along with long-term inflammation, is why researchers have looked for connections between oral health and overall health.
Is gum disease linked to heart disease?
People with gum disease have higher rates of heart attack, stroke and other atherosclerotic disease. In 2012, the American Heart Association reviewed the evidence and concluded that the association is real and holds up after accounting for known shared risk factors. It also concluded that the evidence does not show that gum disease causes heart disease, and that there is no evidence gum treatment prevents heart disease or changes its outcome. [2]
Smoking, age and diabetes raise the risk of both conditions, which explains part of the overlap. The practical message from the AHA statement is to treat gum disease for its own sake and not to treat it as a heart-disease prevention strategy.
What about diabetes?
This is the strongest connection. High blood sugar makes gum disease more likely and more severe, and severe gum disease can make blood sugar harder to control. [3] A large Korean study also found that people who brushed three or more times a day were somewhat less likely to develop diabetes over ten years. [6] Read more in our post on brushing your teeth and diabetes risk.
Is gum disease linked to cancer?
Several large studies have found modest links between a history of gum disease and certain cancers.
Pancreatic cancer. A Harvard study of more than 51,000 men found about 64% higher pancreatic cancer risk in men who reported gum disease. The authors said the finding needed confirmation. [4]
Cancer in older women. A study of nearly 66,000 postmenopausal women found about 14% higher overall cancer risk. See gum disease and cancer risk in older women.
Stomach and esophageal cancer. See gum disease and stomach or esophageal cancer.
All of these are observational studies. None shows that treating gum disease lowers cancer risk.
Is gum disease linked to Alzheimer's disease?
Researchers have found the gum-disease bacterium Porphyromonas gingivalis and its enzymes in brain tissue from some people with Alzheimer's disease, and mouse studies suggest the bacterium can reach the brain. [5] This is early-stage research. It has not been shown that gum disease causes Alzheimer's or that gum treatment prevents it.
How can you protect your gums?
Brush twice a day with fluoride toothpaste and clean between your teeth once a day.
Don't smoke or vape.
If you have diabetes, work with your physician to keep blood sugar in your target range.
See a dentist regularly. Gum disease is usually painless until it is advanced, so a professional exam is how it is found.
Tell your dentist about your health conditions and medications.
Where can you get your gums checked in Jacksonville?
A comprehensive dental exam at our office includes measuring the gum pockets around each tooth and reviewing your medical history. Contact us or call 904-398-1549 to schedule.
Sources
Centers for Disease Control and Prevention. Gum (periodontal) disease. Retrieved October 6, 2026.
Lockhart PB, Bolger AF, Papapanou PN, et al. Periodontal disease and atherosclerotic vascular disease: does the evidence support an independent association? A scientific statement from the American Heart Association. Circulation. 2012;125(20):2520-2544. doi:10.1161/CIR.0b013e31825719f3 (retrieved via PubMed)
National Institute of Diabetes and Digestive and Kidney Diseases. Diabetes, gum disease and other dental problems.
Michaud DS, Joshipura K, Giovannucci E, Fuchs CS. A prospective study of periodontal disease and pancreatic cancer in US male health professionals. J Natl Cancer Inst. 2007;99(2):171-175. doi:10.1093/jnci/djk021 (retrieved via PubMed)
Dominy SS, Lynch C, Ermini F, et al. Porphyromonas gingivalis in Alzheimer's disease brains: evidence for disease causation and treatment with small-molecule inhibitors. Sci Adv. 2019;5(1):eaau3333. doi:10.1126/sciadv.aau3333 (retrieved via PubMed)
Chang Y, Lee JS, Lee KJ, Woo HG, Song TJ. Improved oral hygiene is associated with decreased risk of new-onset diabetes: a nationwide population-based cohort study. Diabetologia. 2020;63(5):924-933. doi:10.1007/s00125-020-05112-9 (retrieved via PubMed)
About the author. CJ Henley, DMD, is a general dentist in Jacksonville whose practice focuses on cosmetic and restorative dentistry, dental implants and dental care around head and neck cancer. Meet Dr. Henley.
CJ Henley, DMD, PA · 3675 Hendricks Avenue, Jacksonville, FL 32207 · 904-398-1549
Updated October 2026.