Periodontitis in Focus:

What you should know about the most common dental disease in dogs

And why periodontitis in dogs so often goes unnoticed, what role the bacterium Porphyromonas gulae and the natural microbiome play, and how you can protect your dog’s oral health early on.

What many dog owners don't know

Periodontitis is a chronic inflammation of the supporting structures of the teeth, namely the gums, connective tissue and jawbone. It is by far the most common dental disease in dogs, and its prevalence rises sharply with age: from around 41 percent in dogs aged 1 to 4, to about 54 percent in dogs aged 5 to 8, and more than 85 percent in dogs over 8.

It is triggered by a shift in the oral microbiome: harmful bacteria such as Porphyromonas gulae gain the upper hand, while protective microorganisms are pushed back.

The insidious thing is that periodontitis in dogs is often not very painful and goes unnoticed for a long time, but it leads to gum recession, bone loss and tooth loss.

P. gulae instead of P. gingivalis: the key difference from humans

In humans, Porphyromonas gingivalis is considered a key bacterium in periodontitis. In dogs, this role is played by the closely related Porphyromonas gulae, which shares around 98 percent of its genetic information with P. gingivalis . Both bacteria produce the same aggressive enzymes, known as gingipains, which they use to damage tissue and manipulate the immune defenses. P. gulae is particularly abundant in dogs with severe periodontitis and is largely absent in animals without the disease.

PerioTrap orzen Wirkprinzip Porphyromonas gingivalis (hochaufgelöst).48c8175d 61e731d2 9e28 4704 9eaa 95c539bdfef7

Why dogs in particular are so frequently affected

Dogs develop periodontitis significantly more often than humans. In addition to age, factors such as breed, tooth alignment, diet, and poor oral hygiene play a role. Small dog breeds are considered particularly susceptible.

In dogs, too, the disease is not limited to the mouth. Correlations with other diseases as well as with age-related cognitive decline, which resembles Alzheimer's in humans, are being discussed.

The microbiome: the invisible shield in a dog's mouth

Even though the oral microbiome in a dog's mouth is fundamentally different from that of a human, the protective function of both microbiomes is similar. In a healthy balance, these microorganisms keep pathogens in check. If the system becomes unbalanced, germs like P. gulae gain ground. The biofilm hardens, protects the pathogens, and triggers chronic inflammation. Conventional agents such as strong disinfecting solutions have a broad effect and also strike beneficial bacteria, which can weaken the microbiome in the long term.

ChatGPT Image Sep 22 2025 04 08 26 PM – PerioTrap

Selectivity as a new approach to oral care

Modern approaches increasingly rely on selectivity and a targeted management of microbial factors. So-called pathoblockers aim to influence specific characteristics of microorganisms rather than reducing bacteria non-specifically. The PerioTrap® technology is based on this approach: it was developed with a focus on virulence-associated properties of P. gulae. Instead of killing bacteria non-specifically, it targets the problematic mechanisms of P. gulae. In this way, the central disrupting factor is controlled while the beneficial oral flora is preserved.