Dental Disease in Dogs: Signs, Causes & Treatment Guide

Dental disease in dogs is one of the most common health conditions seen by veterinarians. In fact, periodontal disease in dogs, also known as gum disease, can begin as early as 3 years of age, with most dogs developing some degree of dental disease as they grow older.

But because dogs instinctively hide pain, many pet parents don't realise there's a problem until they notice persistent bad breath or changes in their dog's eating habits. Left untreated, dental disease can cause chronic pain, tooth loss, oral infections, and, in severe cases, allow bacteria to spread to other parts of the body.

Since periodontal disease accounts for the vast majority of dental problems in dogs, this article focuses primarily on this condition.

 

What is Dental Disease in Dogs?

Dental disease is a broad term that refers to any condition affecting a dog's teeth, gums, or other structures inside the mouth. These include fractured teeth, tooth root infections, retained baby teeth, abnormal tooth alignment, oral tumours, and gum disease.

The most common form of dental disease in dogs is periodontal disease. This condition affects the tissues that support the teeth, including the gums, periodontal ligaments, and jaw bone.

The disease usually begins as dog gingivitis, where plaque bacteria cause the gums to become red, swollen, and inflamed. If plaque is not removed, it hardens into tartar, allowing bacteria to spread below the gum line. This progresses into periodontitis, where the supporting tissues and bone are permanently damaged, causing teeth to loosen or even fall out.

Unlike humans, dogs rarely develop cavities. Instead, gum disease in dogs remains the leading cause of dental problems.

 

What are the Signs of Dental Disease in Dogs?

The signs of dental disease are often subtle, particularly during the early stages. Dogs are very good at masking discomfort, so even those with significant dental pain may continue eating normally.

Common signs include:

• Persistent bad breath (halitosis)
• Pawing at the mouth
• Red, swollen, or bleeding gums
• Excessive drooling
• Blood in the saliva
• Reluctance to chew toys or hard treats
• Dropping food while eating
• Pain when the face or mouth is touched
• Facial swelling
• Loose or missing teeth
• Reduced appetite or preference for softer foods

Even if some of these signs are not evident, your dog may still have periodontal disease in dogs, making regular veterinary dental examinations essential.

 

What Causes Dental Disease in Dogs?

The primary cause of dental disease in dogs is plaque, a sticky layer of bacteria that naturally forms on the surface of the teeth. Without regular brushing or professional cleaning, plaque hardens into tartar, creating an ideal environment for bacteria to thrive.

Over time, these bacteria trigger inflammation of the gums, irritate the gums, causing inflammation and eventually infection that can damage deeper tissue and bone, leading to periodontitis.

Some key risk factors include:

• Breed and size: Small and flat-faced breeds (like Shih Tzus, Pomeranians, French Bulldogs) are more prone due to crowded teeth.^[2]
• Age: Risk increases over time, with most dogs showing signs after 3 years of age.^[2]
• Diet and chewing habits: Soft diets can worsen plaque buildup, while appropriate dental chews can help reduce it. Very hard chews (bones, antlers) may cause fractures.^[3]
• Oral abnormalities: Retained baby teeth, misaligned teeth, and crowded mouths create spaces where plaque easily accumulates, increasing the risk of gum disease. These are commonly associated with brachycephalic breeds, too.
• Poor dental hygiene: Lack of regular dental hygiene, such as brushing or dental chews, is one of the biggest contributors to plaque and tartar build-up.
• Underlying health conditions: Certain medical conditions, including diabetes and poor nutrition, may increase susceptibility to oral infections and delay healing.

 

How is Dental Disease in Dogs Diagnosed?

Veterinarians diagnose dental disease in dogs using a combination of your dog's history, clinical signs, and a detailed oral examination.

Although your veterinarian can identify obvious tartar or inflamed gums during a routine consultation, a complete dental assessment usually requires general anaesthesia. This allows every tooth and the tissues below the gum line to be examined safely and thoroughly.

During the procedure, your veterinarian may:

• Examine every tooth and gum surface
• Check for loose, fractured, or damaged teeth
• Take dental X-rays to evaluate bone loss and hidden tooth root disease

Since anaesthesia is required, blood tests are typically recommended beforehand to assess your dog's overall health and identify any conditions that may increase anaesthetic risk.

 

How is Dental Disease in Dogs Treated?

Treatment depends on the stage and severity of periodontal disease in dogs, but the primary goals are to eliminate infection, relieve pain, and prevent further damage. Common treatment options include:

• Professional Dental Cleaning: Scaling and polishing performed under general anaesthesia remove plaque and tartar both above and below the gum line. This is the cornerstone of treatment for most dogs.
• Tooth Extractions: Teeth that are severely loose, infected, fractured beyond repair, or causing pain are removed to improve comfort and prevent ongoing infection.
• Root canal therapy: In selected cases, especially involving important functional teeth, root canal treatment may allow the tooth to be preserved.
• Medications: Pain relief and antibiotics (if infection is present). Antibiotics are not usually given for mild gingivitis but are used for moderate to severe periodontitis or when oral surgery is performed. 
• Advanced procedures: in severe cases, specialised dental surgery may be needed. Other uses include medicated gels, antimicrobial toothpastes or varnishes, and even laser therapy to help clean infections. ^[5] In cases of autoimmune conditions, immunomodulating drugs have also been suggested.

Some natural supplements, including certain algae-derived products and plant extracts, may help reduce plaque accumulation and gum inflammation. However, these should only be considered supportive therapies and should never replace professional dental care or regular brushing. ^[5]

 

 Can Dental Disease in Dogs be Prevented?

Yes! Preventing dental disease in dogs is far easier, less expensive, and more comfortable than treating advanced periodontal disease.

Key steps include:

• Daily brushing: the most effective method. Use pet-safe toothpastes only, as human toothpaste can contain ingredients that may be toxic to dogs (e.g., artificial sweeteners). Even brushing a few times a week helps. Though brushing can be quite tricky, especially if your dog is not desensitised to their mouth being touched and handled, through consistent and gradual exposure, dogs can tolerate it well. Speak to a trainer to learn how to introduce brushing to your dog. Starting at the puppy stage is the best strategy.
• Dental chews and toys: Soft chews can help reduce plaque. Avoid very hard chews that may fracture teeth.
• Dental diets and additives: Specialised diets are available that mechanically clean teeth or contain products to inhibit plaque. Some vets recommend these dental diets to all adult dogs.  Some liquid additives or gels can be added to drinking water to reduce plaque and bad oral bacteria. These can be helpful if brushing is not possible, but are not a replacement for it.

• Regular vet check-ups: Annual dental examinations allow veterinarians to detect early dog gingivitis before it progresses into more severe periodontal disease in dogs. Some dogs, particularly small breeds, may benefit from professional cleanings more frequently based on their individual risk.

 

What is the Prognosis?

Prognosis varies with the stage of dental disease present:

Stage 1: has an excellent prognosis with professional cleaning and home brushing being enough and is usually fully reversible. 

Stage 2-4: where periodontitis is seen, the damage to the bone can be permanent, but treatment can prevent further damage. After scaling and extractions if needed, most dogs experience relief from pain and go back to eating normally. 

If dental issues are ignored, the prognosis worsens. Chronic periodontitis can be very painful and can lead to a quick decline in oral health. 

Chronic oral pain can also change a dog’s behaviour, with severe cases even showing aggression and hence is an important differential for diagnosis. 

Chronic deep infections can develop into abscesses, fistulas and fractures and can in turn also get septic (infection entering the bloodstream), leading to severe kidney and liver affections which complicate the case even further as anaesthesia becomes even riskier for such patients. 

 

Conclusion

Dental disease covers a whole array of conditions that can affect a dog’s oral cavity (teeth, gums, tendons, jaw bone). It can display in stages from 1 to 4, with gingivitis (swollen gums) being the first noticeable sign. As the stages progress, the involvement of bone is higher, making the damage severe and often permanent. Diagnosis is usually based on history, symptoms and a thorough dental exam under anaesthesia. Treatment involves dental scaling and cleaning with extractions if necessary. Regular brushing and providing safe dental chews for your dog are good dental practices for prevention. Starting dental care early can be an important step in maintaining oral health for your dog and can make their later life stages much easier and pain-free. Ignoring dental health can cause a quick decline in physical, mental and overall welfare of a dog.

 

References

1. Brunius Enlund, K., Pettersson, A., & Eldh, A. C. (2022). Dog owners’ ideas and strategies regarding dental health in their dogs: Thematic analysis of free text survey responses. Frontiers in Veterinary Science, 9, 878162. https://doi.org/10.3389/fvets.2022.878162
2.  Stella, J. L., Bauer, A. E., & Croney, C. C. (2018). A cross-sectional study to estimate prevalence of periodontal disease in a population of dogs in commercial breeding facilities in Indiana and Illinois. PLOS ONE, 13(1), e0191395. https://doi.org/10.1371/journal.pone.0191395
3. Konjeti, S. S., Suresh, K., Pavan Kumar, C., & Kamalakar, G. (2025). Occurrence of canine periodontal disease. Indian Journal of Veterinary Medicine, 45(1), 25–27. https://doi.org/10.56093/ijvm.v45i1.167575
4. American Veterinary Dental College. (n.d.). Stages of pet periodontal disease. https://afd.avdc.org/five-stages-of-pet-periodontal-disease/
5. Cunha, E., Tavares, L., & Oliveira, M. (2022). Revisiting Periodontal Disease in Dogs: How to Manage This New Old Problem? Antibiotics, 11(12), 1729. https://doi.org/10.3390/antibiotics11121729