Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Tooth Resorption in Dogs: Causes, Signs & Care (Vet Answer)

close up of a dog's mouth showing cavity, gingivitis, and tooth decay

Tooth resorption is a common disease in dogs that involves the loss of tooth structure, occurring when the body removes tissue containing minerals. Although tooth resorption has been studied much more extensively in cats, it has been found to occur in dogs more frequently than previously thought. As a progressive disease, it leads to the gradual destruction or loss of teeth.

Resorption can affect all the parts of a tooth, including the root, the cementum (which covers the root), the pulp, the dentin (the layer found under the enamel), and the enamel.

Tooth resorption is usually not visible on the surface. Only X-rays can show if your dog suffers from the condition. This dental problem can also lead to infection, fracture, tooth loss, and other issues that can cause lasting damage to the teeth, gums, and jaw.

Dogster divider_v2_NEW_MAY_24_

What Is Tooth Resorption?

Tooth resorption occurs when there is destruction or loss of tooth structure. There are two primary types of tooth resorption based on the origin of the damage: internal and external. Each of these types has various subcategories. This dental condition is more frequently found in older large-breed dogs.1

Similarly to humans, internal tooth resorption is quite infrequent compared to external resorption in dogs. External resorption can affect any part of the outside of the tooth, from the roots to the cementum outside. The dentin or cementum begins to be absorbed into the root canal, causing the inner and outer surfaces of the tooth to become inflamed.

Studies show that the most common types of tooth resorption in dogs are external replacement resorption and external inflammatory resorption. External cervical root surface resorption, external surface resorption, and internal surface resorption are not that common in dogs.

Lesions can appear on any tooth, but the premolars of the lower jaw are particularly affected. This condition is usually not visible to the naked eye and must be diagnosed through radiological examination (X-rays).2

lot of tartar calculus dental in the dog on the corner teeth
Image By: mojahata, Shutterstock

Dogster divider_v2_NEW_MAY_24_

What Are the Signs of Tooth Resorption in Dogs?

Tooth resorption in dogs typically has no external signs, meaning nothing is visible on the tooth. When the dentin (the layer found under the enamel) is exposed, this condition becomes painful. If you’re worried about the well-being of your dog, you should get in touch with a vet for advice.

When the lesion is touched, dogs can present:
  • Reluctance to be touched
  • Tremors of the jaw

If tooth resorption occurs at the root, dogs may not show any clinical signs. If resorption occurs above the gum line, dogs may experience discomfort and pain.

Other signs of tooth resorption in dogs include:
  • Mouth bleeding
  • Hypersalivation
  • Difficulty eating
  • Tooth fracture

Many dogs will swallow food unchewed because tooth resorption causes them pain. This behavior might be misinterpreted as an increased appetite.

Other dogs prefer to chew only on one side, while some pets prefer solid food instead of soft food. Soft/wet food can stick to their teeth and cause discomfort and pain.

Occasionally, dogs will stop eating and may show obvious signs of pain: excessive salivation, discomfort to the touch, and food dropping from their mouth.

What Are the Causes of Tooth Resorption in Dogs?

Although there are many theories regarding what causes tooth resorption in dogs, the truth is that the exact cause is not known.

Regardless, tooth resorption leads to the erosion of dentine and cementum, reaching the pulp of the tooth. At the microscopic level, during tooth resorption, a group of cells called odontoclasts break down the hard tissue of the tooth. Odontoclasts are large, multinucleated cells with cytoplasm rich in cell organelles, as they are specialized in the process of the tooth’s substance resorption.

When the crown is affected, the disease becomes painful for dogs and causes discomfort, and the defects created in it will become entry gates for oral bacteria.

havanese resting in dog bed
Image By: Boryana Manzurova, Shutterstock

dogster face divider

How Do I Care for a Dog With Tooth Resorption?

If your dog shows signs of oral discomfort or abnormality, take them to the vet. Your vet will examine your dog and likely recommend assessment under anesthesia and x-rays to diagnose tooth resorption. Tooth resorption may only present as mild redness in the gum covering the affected tooth.

Also, if your dog suffers from tooth resorption, more teeth might be affected in the future. The only way to detect the condition in time is through regular dental check-ups.

Interested in having a vet check your dog online? Contact one of our experts here:

Did you know you can talk to a vet online? Click on the image or button below to schedule a call: PangoVet_Mention-in-Content Savings V1


Dogster divider_v2_NEW_MAY_24_

Frequently Asked Questions (FAQ)

Can Tooth Resorption Be Reversed in Dogs?

In some cases, stopping or decreasing the progression of tooth resorption in dogs can be done through root canal therapy. As with humans, this involves cleaning the pulp of the affected tooth and filling it with dental material. That said, the preferred method of treatment for pets is to remove the affected tooth/teeth altogether; once the tooth resorption is exposed in the oral cavity, bacteria can enter the tooth, which will lead to inflammation and infection.

How Serious Is Tooth Resorption in Dogs?

Tooth resorption in dogs is a serious medical condition because it can lead to changes inside the oral cavity, including infections, tooth loss, or tooth pain. It can also cause damage to the gums, jaw, and teeth. If your dog shows signs of an oral problem, take them to the vet for a dental checkup.

teeth of a pug dog getting checked by a vet
Image By: Ermolaev Alexander, Shutterstock

What Are the Types of Resorptive Lesions?

Resorptive lesions can be classified as physiological (normal) and pathological (caused by disease). In physiological resorption, the dog’s body prepares to replace baby teeth with permanent teeth. Pathological resorption occurs in permanent teeth and can be subclassified into external and internal resorption. These two types are subdivided into 7 categories.

Dogster divider_v2_NEW_MAY_24_

Conclusion

Tooth resorption in dogs is a common dental condition that especially occurs in older large breed dogs. This condition can be broadly classified depending on the location where the damage starts: internal and external. The two most common types of tooth resorption in dogs are external replacement resorption and external inflammatory resorption. This condition cannot be prevented, and treatment usually consists of extracting the affected tooth/teeth to prevent the infection from entering the oral cavity. It has no obvious visible changes on the surface of the tooth and clinical signs can be subtle. Tooth resorption usually can only be diagnosed via radiographic examination, so regular dental check-ups are recommended.


Featured Image Credit: Kasang.Foto, Shutterstock

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Malteagle (Maltese & Beagle Mix): Info, Pictures, Care & More

The Malteagle is a charming mixed breed that comes from the Maltese and Beagle. These adorable, kind, and affectionate dogs are happy to...

Can Dogs Eat Cornbread? Vet-Approved Facts & FAQ

During dinner, your dog may stand near you and beg for table scraps, but some food is unhealthy and hazardous to canines. Cornbread...

How to Train a Cane Corso: 6 Expert Tips

Cane Corso puppies are sweet dogs. With their droopy eyes, paws too big for their bodies, and floppy ears, what’s not to love?...

Do Dobermans Make Good Guard Dogs? Training, Pros & Cons

Doberman Pinschers have an extremely profound presence. These dogs are muscular, sleek, and sharp. But does their guard dog nature come hand in...

More related

10 Best Dog Ramps for Dachshunds in 2025 – Reviews & Top Picks

Dachshunds are energetic, loving canines, but their tiny legs and tendency to back problems limit their ability to leap onto a bed or...

Are Rhodesian Ridgebacks Good with Kids? History, Tips & FAQ

Rhodesian Ridgebacks are loyal, intelligent, and loving. They also make good companions and excellent watchdogs. However, when looking for a dog that makes...

8 Best Wet Vacuums for Pet Urine In 2025 – Reviews & Top Picks

Accidents happen, especially if you have furry friends. Pet urine can be a hassle to clean; it often leaves a stain and an...

Why Do Dogs Have Whiskers? Canine Anatomy Explained

Many mammals have whiskers, but have you ever wondered what purpose they serve? Whiskers help dogs to navigate the world by transmitting sensory...

Keep reading

Performatrin Dog Food Review 2025: Recalls, Pros & Cons

Review Summary You might not recognize the name Performatrin Dog Food, nor are you likely to find it without a lot of looking in the United States. That’s because it’s the house brand of the Canadian-based retailer Pet Valu. The...

Dogster_Performatrin Dog Food Review

What Is Chicken By-Product in Dog Food? Facts & FAQ

Chicken is the most common first ingredient in dog food. But it’s often followed by “chicken meal,” “chicken by-product,” or “chicken by-product meal.” Veterinarians recommend that dog foods have these ingredients in their recipes, so they’re considered to be healthy....

man buying pet food

Can Dogs Eat Raspberries? Vet-Verified Nutrition Facts & FAQ

Although dogs are facultative carnivores, many enjoy snacking on fruits and veggies and they can provide additional health benefits. However, it can be tricky for dog parents to remember which fruits are entirely safe for canines. For example, can dogs...

Can Dogs Eat_Raspberries

PetPlate Dog Food & Supplement Subscription Review 2025: Door Delivery For Your Pup Made Fresh

Are you considering switching your dog to a dog food delivery service but struggling to find one that includes enough variety to suit your dog’s needs? If that’s the case, PetPlate might be the best choice for you. This subscription...

DOG_SAPR_PetPlate Human-Grade Dog Food

Spirulina for Dogs: Vet-Reviewed Benefits, Uses & Tips

Everyone has heard of the benefits of plant-based foods, and this way of eating has become more popular among people in the last two decades. Spirulina is a supplement used every day by thousands of people because it’s rich in...

spirulina powder and tablets in a wooden bowl

Can Dogs Eat Cool Whip? Vet Approved Facts & FAQ

Cool Whip is a summer favorite—a perfect topping for all hot weather treats! It is no wonder that our dogs want a dollop for themselves! If your dog got into the goodies or you just want to spruce up your...

Can Dogs Eat Cool Whip

Why Do Dogs Love Peanut Butter So Much? Vet-Approved Enrichment Ideas

When we think of wild canids, we imagine a wolf hunting in a pack and chasing down deer, elk, or moose. Our canine companions are a long way from this lifestyle. Domestication has profoundly impacted dogs. You can make a...

Peanut butter on top of the black dogs nose

Ziwi Peak Dog Food Review 2025: Recalls, Pros & Cons

Review Summary Introduction When it comes to commercial dog food, you’re going to be hard-pressed to find something better than Ziwi Peak. It offers high-quality, environmentally friendly ingredients that combine the nutrition of a raw diet in a convenient dry...

Dogster_Ziwi Peak Dog Food