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By Paula Fitzsimmons

You already know that not taking care of your dog’s teeth can lead to periodontal disease, a condition that results in bleeding gums, bad breath, and ultimately tooth loss. “Periodontal disease starts under the gum line with a substance called plaque, which is made up of bacteria,” explains Dr. Lisa Fink, a board-certified veterinary dentist and oral surgeon at Cornell University Veterinary Specialists in Stamford, Connecticut. “Left on tooth surface and in the area surrounding the tooth, plaque incites the animal’s immune system and an inflammatory response ensues, starting with gingivitis.”

Poor oral hygiene is also linked to other health issues, including diabetes and heart disease, and can lead to a broken jaw. It’s a painful condition, but because dogs are experts at hiding pain, you may not even realize there’s a problem.

Here are five ways neglecting your dog’s oral hygiene can negatively impact not only her teeth and gums, but also her overall health and well-being. Although veterinarians say they can’t know with absolute certainty that periodontal disease is the cause of these ailments, there is ample evidence that points to a connection.

Dental Disease Promotes Inflammation

Bacteria that originates from dental infections triggers the immune system, which results in inflammation. The inflammatory response kills bacteria but also destroys tissue in the process. “In fact, the majority of tissue destruction associated with dental infections is caused by products of the immune system and not by degradation products from the bacteria themselves,” explains Dr. Chad Lothamer, an assistant professor of dentistry and oral surgery at the Veterinary Teaching Hospital at Colorado State University in Fort Collins. “This can lead to local tissue loss, pain, and infection of the surrounding tissues.”

The more severe the dental disease and the more inflammation present, the increased likelihood that bacteria may enter the bloodstream and travel to other parts of the body, says Lothamer, who is board-certified in veterinary dentistry. “Infections in and around the teeth do cause increases in inflammatory mediators and can cause bacteremia (a state in which bacteria appears in the blood), which likely does cause damage to distant parts of the body or distant infections.”

Reducing inflammation by treating periodontal disease can have profound impact on a dog’s health because “it decreases the amount of work the body has to do to fight this infection,” says Dr. Kris Bannon, a board-certified veterinary dentist at Veterinary Dentistry and Oral Surgery of New Mexico in Algodones.

Dental Disease Increases the Risk for Heart Disease

There is evidence that periodontal disease is linked to cardiopulmonary diseases like endocarditis, according to the World Small Animal Veterinary Association (WSAVA). The risk of endocarditis is about six times higher in dogs with stage three periodontal disease than for dogs without it, the association says.

Bannon says a large number of canine patients present with both periodontal disease and heart disease concurrently. While it can be tough to determine cause and effect, “we know there’s an association because they so often occur together,” she says.

One key piece of evidence of a connection, Bannon says, is that the cultured bacteria from infected heart valves are identical to those also identified in the mouth.

Dental Disease Complicates Diabetes

Diabetic dogs tend to have higher levels of periodontal disease, Bannon says. In fact, the two conditions feed on each other in a vicious cycle. The more severe the periodontal disease is, the more serious the diabetes gets, which, in turn, worsens the periodontal disease, she says.

It’s not always possible to determine which came first—the periodontal disease or the diabetes—but inflammation and infection associated with periodontal disease can affect blood sugar metabolism, says Dr. Jason Nicholas, chief medical officer at Preventive Vet, based in Portland, Oregon.

“This is especially important in terms of complicating the control and regulation of diabetic animals.” Inflammation and infection decrease the body’s sensitivity to insulin, a primary hormone involved in blood sugar regulation, he adds.

It’s difficult to balance a dog’s diabetes until the periodontal disease is treated, Bannon says. “Once that tooth is addressed, their diabetes is much easier to stabilize.”

Dental Disease Causes Pain and Sensitivity

Dogs rarely show signs that they’re in pain, and if they’re behaving and eating as usual, it may appear as nothing is wrong. That’s an incorrect assumption.

“Appetite is a strong drive. It is easy to avoid biting on a painful tooth. We all have seen dogs ‘inhaling’ hard food without chewing,” says Dr. Stanley Blazejewski, a board-certified veterinary dentist at VRC Specialty Hospital in Malvern, Pennsylvania. “But it is obvious that they can suffer from oral pathology because owners frequently remark that ‘he/she is just like a puppy again’ after treatment, adding that they regret postponing care.”

“It’s a hidden disease,” adds Dr. Donnell Hansen, a board-certified veterinary dentist with BluePearl Veterinary Partners in Blaine, Minnesota. Dogs may display signs of dental trouble such as drooling, a lack of appetite, swelling, or bleeding, but these do not show up in every case.

Usually by the time the signs come up, it is too late to the save the tooth, and there is a high likelihood the pet has been living quietly in pain for quite some time. “Most pets continue with their daily routine and it is not until we have the opportunity to address the fractured canine or wiggly molar that families will notice a difference in their pet,” Hansen says.

Dental Disease Can Lead to a Broken Jaw

Poor oral hygiene can lead to a broken jaw in dogs, especially smaller breeds with disproportionately large teeth, such as Chihuahuas, Lhasa Apsos, Maltese, and Shih Tzus, Hansen says. “Infection to these dogs’ mouths can weaken their relatively small jaws and something as simple as jumping off the couch can lead to jaw fracture,” she says.

It’s fortunately not a common occurrence, says Dr. Gwenn Schamberger, a board-certified veterinary dentist with WVRC Emergency & Specialty Pet Care in Waukesha, Wisconsin. “But I do see this and it is serious and very painful—it can be very difficult to get the fracture to heal appropriately— because the bone is not healthy bone,” Schamberger says. “I have also had patients that have had a fractured tooth that has been fractured for years and ‘not caused a problem’ and they become sick for another reason and now that fractured tooth does becomes an obvious problem.”

Most of the time it can be fixed, says Fink, who is also an adjunct assistant clinical professor of dentistry and oral surgery at Cornell University College of Veterinary Medicine in Ithaca, New York. “However, in many cases jaws that fracture due to periodontal disease present an extra challenge due to the lack of good quality bone in the area as well as lack of teeth.”

The most effective way to prevent these conditions from occurring is to maintain a solid oral hygiene regimen, which should include regular cleaning of your dog’s teeth and gums. Additionally, your dog should receive an annual oral exam, and when needed, an anesthetized oral examination with full tooth-by-tooth exam and dental X-rays, Fink advises. The Veterinary Oral Health Council lists treats, chews, and dentifrices that have been scientifically tested and are approved for dogs and cats as dental treats, she adds.

Taking caring of your dog’s oral hygiene is about much more than clean teeth and fresh breath, Bannon concludes. “It’s a health issue.”

The Pet Resorts is a multi-year Best of Atlanta award winner from Kudzu reviewers. During the day, we provide 5-7 hours of doggie daycare supervised by a staff fully trained in reading dog signals and who are Pet First Aid Certified. Web cams are available during playtime for owners missing their furry friends! For overnight boarding, we provide Pet Suites or Condos for animals of all sizes. We provide all-inclusive pricing so there are no surprises at check-out. Our Dunwoody location caters for dogs 50 lbs or less, while our N. Fulton/Cumming location, situated on four rural acres, takes all size dogs and provides a Pet Taxi for pick up and drop off. Both of The Pet Resorts locations service Sandy Springs, Brookhaven, Chamblee, Doraville and the surrounding communities.