Cats are experts at hiding pain. A cat can keep eating with a tooth that is slowly dissolving, and many owners only find out at a routine dental cleaning. That condition is called tooth resorption, and it is one of the most common dental diseases in adult cats.
What tooth resorption is
Tooth resorption happens when cells called odontoclasts start breaking down a tooth’s own structure. It often begins at or below the gumline and works its way through the root and crown. Exposed sensitive tissue can be very painful. The cause is still not fully understood.
Studies of adult cats suggest a large share are affected, and the risk increases with age. Any breed can develop it.
Signs to watch for
Most cats show subtle signs, or none at all:
- A red spot or a bump of gum tissue growing over part of a tooth
- Chattering of the jaw, especially when eating
- Chewing on one side, or dropping food
- Preferring wet food over dry
- Drooling, or pawing at the mouth
- Less grooming, or irritability
Because cats rarely stop eating altogether, owners tend to miss the problem until a vet spots it. Older cats are at the highest risk, so regular checkups matter more with every year.
How vets diagnose it
The lesions often sit below the gumline, so a vet cannot fully assess them on a quick look in the exam room. Diagnosis requires general anesthesia and full-mouth dental radiographs. X-rays show whether the root is still a normal root, or whether it is being replaced by bone, which changes how the tooth is treated.
Treatment: why extraction is usually the answer
Unlike a cavity in a human tooth, resorption cannot be filled or reversed. Once it causes pain, the standard treatment is extraction.
Feline teeth are small and fragile, and resorbing roots break easily, so extraction is delicate surgery. Vets typically section multi-rooted teeth, lift a small gum flap, and use fine root tip elevators to work each root free. In some cases, a veterinary dentist may remove the crown and leave a resorbing root that has already turned into bone, but only when radiographs show it is safe.
Recovery and life after extraction
Most cats bounce back quickly once the painful tooth is gone, often eating within a day or two. Your vet will send home pain medication and may recommend soft food for a short time. Many owners are surprised that their cat seems happier and more playful afterward, a sign of how much pain it was hiding.
Keeping your cat’s mouth healthy
- Book a dental exam at least once a year, more often for older cats.
- Choose a vet who takes dental radiographs as a standard part of every cleaning.
- Ask about dental diets or treats with the VOHC seal.
- Try gentle tooth brushing with cat-safe toothpaste, if your cat tolerates it.
- Don’t ignore changes in eating, grooming or behavior.
Tooth resorption can’t always be prevented, but it can be found and treated. Regular exams with X-rays mean your cat doesn’t have to live with pain it will never tell you about.
