Tooth Resorption in Cats: A Painful and Common Dental Disease

Feline tooth resorption (FTR) is a progressive and painful condition in which the tooth structure is destroyed by cellular activity. It affects more than half of adult cats and is among the most common sources of oral pain in companion cats.

Key Facts

Feline tooth resorption is estimated to affect 28–75% of cats, with prevalence increasing with age
The condition involves odontoclast cells eroding tooth structure from the crown, root, or both
Affected teeth may show pink or red lesions at the gumline where sensitive dentine is exposed
Many cats show no obvious signs despite significant pain — hiding discomfort is a feline survival instinct
Subtler signs include jaw chattering when the lesion is touched, preference for soft food, and reduced grooming
The cause is not fully understood; dietary calcium-phosphorus imbalance and viral exposure have been hypothesised
Treatment is surgical extraction — there is no way to arrest resorption once it begins
Intraoral dental radiography is essential for diagnosis, as lesions below the gumline are not visible externally

Welfare Considerations

Tooth resorption is one of the most common causes of unrecognised chronic pain in cats. Because cats instinctively mask pain — a survival behaviour — owners and even veterinarians can overlook significant dental disease. The exposed dentine is acutely sensitive: any contact with food, water, or tongue causes sharp pain. Over time this likely contributes to reduced appetite, reluctance to eat hard food, and stress-related behavioural changes. Annual dental examinations with dental radiography are the only reliable way to identify and treat resorption before it progresses. Extraction, while requiring anaesthesia, relieves the pain definitively.

What You Can Do

Schedule annual veterinary dental examinations for your cat, including intraoral radiographs
Watch for subtle signs of oral pain: jaw chattering, food dropping, soft-food preference, or reluctance to eat
Do not postpone recommended dental extractions — untreated resorption causes ongoing daily pain
Brush your cat's teeth daily with veterinary toothpaste to support general oral health
Advocate for dental health to be routinely discussed at every annual wellness examination