Tooth Resorption in Cats: A Painful Dental Disease Many Owners Don't Know About
Dental disease is common in cats, but not all dental problems are caused by plaque or tartar. One particularly painful condition, known as tooth resorption, can develop even in cats whose teeth appear relatively clean.
Because cats instinctively hide discomfort, affected animals may continue eating and behaving normally despite significant dental pain.
At Lonsdale Place Veterinary Clinic, we believe understanding tooth resorption can help cat owners recognize subtle signs of oral discomfort and appreciate the importance of comprehensive dental examinations.
North Vancouver Vet
What Is Tooth Resorption?
Tooth resorption is a condition in which the body's own cells gradually break down the hard structures of a tooth.
Normally, teeth are maintained by a balance of biological processes. In cats with tooth resorption, specialized cells called odontoclasts begin destroying tooth tissue.
The process may affect the roots, crown, or both.
As the disease progresses, the normal structure of the tooth becomes damaged, and sensitive areas may become exposed.
The exact cause of feline tooth resorption remains unknown.
Importantly, this condition is different from ordinary tooth decay or cavities in humans.
North Vancouver Vet
How Common Is Tooth Resorption?
Tooth resorption is one of the most frequently diagnosed dental conditions in cats, particularly as they age.
Studies report varying estimates of prevalence depending on the population examined and the diagnostic methods used.
Because lesions can develop beneath the gumline, the true extent of disease may not be visible during a routine examination of an awake cat.
Some cats have only one affected tooth, while others develop multiple lesions over time.
North Vancouver Vet
Is Tooth Resorption Painful?
Yes. Tooth resorption can be extremely painful, particularly when damage involves the crown and exposes sensitive tissues.
However, cats may not display obvious signs of discomfort.
Owners sometimes assume that a cat must have healthy teeth because it continues eating dry food.
In reality, many cats continue eating despite painful dental disease.
Possible signs include:
Chewing on one side of the mouth
Dropping food while eating
Preference for softer food
Reluctance to chew
Increased salivation
Pawing at the mouth
Reduced grooming
Changes in appetite or behaviour
Some cats show no noticeable symptoms at all.
North Vancouver Vet
How Is Tooth Resorption Diagnosed?
A veterinary oral examination may identify areas of redness, abnormal gum tissue, missing tooth structure, or defects near the gumline.
However, many lesions are located below the visible surface.
Dental radiographs are essential for evaluating tooth resorption because they reveal changes affecting the roots and surrounding structures.
These images help determine the type and extent of resorption and guide treatment decisions.
A complete oral examination and dental radiographs generally require general anesthesia so the mouth can be thoroughly assessed without discomfort or movement.
North Vancouver Vet
Can Tooth Resorption Be Treated?
Unfortunately, once significant tooth resorption has developed, the affected tooth cannot be restored to normal.
Treatment is usually surgical and depends on the type of lesion identified through dental radiography.
In many cases, extraction of the affected tooth is recommended.
For certain lesions where the roots have been extensively replaced by bone-like tissue, a specific procedure called crown amputation may be appropriate. This is only suitable under carefully defined conditions based on radiographic findings.
Antibiotics, dental cleaning, and pain medication alone do not reverse tooth resorption.
The goal of treatment is to eliminate the source of pain and improve the cat's comfort.
North Vancouver Vet
Can Cats Eat Normally After Tooth Extractions?
Many owners worry that removing teeth will make eating difficult for their cats.
Fortunately, cats generally adapt very well following appropriate dental treatment.
Once the painful teeth have been treated and healing is complete, many cats become more comfortable eating and grooming.
Some owners notice improved appetite, activity, or social behaviour after dental procedures.
North Vancouver Vet
Can Tooth Resorption Be Prevented?
At present, there is no proven method to completely prevent feline tooth resorption.
Regular toothbrushing and dental care remain valuable for controlling plaque and periodontal disease, but they do not reliably prevent resorptive lesions.
Routine veterinary examinations and appropriate dental radiographs are important for identifying affected teeth and managing pain.
North Vancouver Vet
Final Thoughts
Tooth resorption is a common and potentially very painful dental condition in cats. Because affected cats often hide their discomfort, the absence of obvious symptoms does not necessarily mean their teeth are healthy.
Regular dental assessments play an important role in identifying hidden oral disease. If your cat has changes in eating habits, signs of mouth discomfort, or has not had a recent dental examination, contact Lonsdale Place Veterinary Clinic to discuss their dental health.
