Dental disease is the most common health problem in adult cats. The American Association of Feline Practitioners (AAFP) estimates that 50-90% of cats over age 4 have some form of dental disease, with the prevalence increasing with age. Unlike many conditions that require diagnostic testing to detect, early dental disease is visible to any attentive owner — and preventable with consistent home care.
Feline dental disease has two distinct major forms: periodontal disease (the same process affecting dogs and humans) and tooth resorption — a painful, progressive destruction of tooth structure unique to cats in its prevalence and mechanism. This guide covers both, along with complete home care guidance.
The Two Main Forms of Feline Dental Disease
Periodontal Disease
The mechanism is identical to that in dogs and humans: plaque (bacterial biofilm) accumulates on tooth surfaces, mineralises into calculus (tartar), and bacteria beneath the gumline trigger an inflammatory immune response that destroys the structures anchoring teeth.
The four stages:
| Stage | Findings | Reversibility |
|---|---|---|
| Stage 1 (Gingivitis) | Red gumline, no attachment loss | Fully reversible with cleaning |
| Stage 2 (Early periodontitis) | Up to 25% attachment loss | Not reversible; controllable |
| Stage 3 (Moderate periodontitis) | 25-50% attachment loss; bone loss on x-ray | Significant damage; management required |
| Stage 4 (Advanced periodontitis) | Over 50% attachment loss; tooth mobility | Extraction usually required |
Periodontal disease in cats is painful but cats rarely show obvious distress. The AAFP notes that cats are stoic pain hiders — they continue eating even with significant oral pain because survival drive overrides comfort. Changes in behaviour, such as reluctance to eat hard food, head tilting when eating, or reduced grooming, often indicate dental pain that the owner had not noticed.
Tooth Resorption
Tooth resorption (previously called feline odontoclastic resorptive lesions, or FORLs) is a painful condition affecting an estimated 20-60% of cats at some point in their lives. In tooth resorption, specialised cells called odontoclasts — normally involved in the resorption of deciduous (baby) tooth roots — become inappropriately activated and begin destroying the enamel, dentine, and root structure of permanent teeth.
Clinical appearance: Early resorptive lesions appear as pink-red erosions at the tooth neck (where the tooth meets the gum). As they progress, the defect enlarges, eventually destroying the crown or root. In advanced cases, the crown may fracture off, leaving root remnants in the jaw.
Pain: Tooth resorption is extremely painful. The dentine exposed by resorptive lesions is highly sensitive. Cats with active resorptive lesions show classic pain behaviours when the affected tooth is touched during examination — jaw chattering, flinching, struggling.
Cause: The cause remains under investigation. No single definitive cause has been established, though Vitamin D imbalance and diet composition have been implicated in research. There is no proven preventive strategy beyond regular dental examinations to catch lesions early.
Treatment: Extraction of affected teeth. In teeth where only the crown is destroyed and the root has been replaced by bone-like tissue (Type 2 resorption), crown amputation (removing the crown and leaving the bone-like root) may be appropriate. Affected teeth cannot be treated conservatively — the pain source must be removed.
"Tooth resorption is a progressive, irreversible process. Early detection through regular dental examinations and full-mouth dental radiographs allows intervention before pain becomes severe." — American Association of Feline Practitioners (AAFP)
Stomatitis
Feline chronic gingivostomatitis (FCGS) is a severely painful oral inflammatory condition affecting a small proportion of cats, causing profound inflammation of the gums, cheeks, and the back of the mouth (alveolar mucosa and caudal oral mucosa). Affected cats often cannot eat, drool blood-tinged saliva, lose weight, and become hunched and withdrawn.
FCGS is associated with inadequate immune modulation of oral bacteria. It is not simply advanced periodontal disease. Treatment is primarily full-mouth tooth extraction, which achieves complete or partial resolution in approximately 60-80% of cases. This sounds extreme but is the current evidence-based standard of care — removal of the dental surfaces that trigger the immune response removes the stimulus for inflammation.
Cats that have had all teeth extracted for stomatitis adapt remarkably well and can eat soft food comfortably.
Home Dental Care for Cats
Toothbrushing
Toothbrushing is the most effective home dental care intervention for cats, just as it is for dogs. The AVDC recommends daily brushing; the AAFP considers three times per week the practical minimum.
What you need:
- Cat-specific toothbrush or finger brush (small head — most cats accept a finger brush more readily than a full toothbrush)
- Enzymatic cat toothpaste in an accepted flavour (fish, chicken, and poultry flavours are usually well-accepted by cats)
- Never use human toothpaste — fluoride is toxic to cats when swallowed, and many formulations contain xylitol, which is also toxic
Conditioning sequence:
The major obstacle to feline tooth brushing is cat resistance to oral handling. The sequence:
- Week 1: Let the cat lick enzymatic toothpaste from your finger. Make this pleasant — offer as a treat at the same time each day.
- Week 2: Place a small amount of toothpaste on your finger and gently rub along the outer surface of the back teeth (upper molars and premolars). Work for 15-30 seconds. Reward with a high-value treat immediately after.
- Week 3: Introduce the finger brush. Let the cat sniff and lick it. Begin making brief contact with the teeth.
- Weeks 4+: Gradually extend to more teeth. Work toward covering all outer tooth surfaces, especially the upper back teeth.
Kittens conditioned to toothbrushing from 8-14 weeks become reliably compliant adults. Adult cats can be conditioned but may require more patience and more weeks at each stage.
Brushing technique:
- Hold the cat's head gently from above, with your thumb and fingers on each side of the muzzle
- Lift the lip to expose the outer tooth surface
- Position the brush at 45 degrees to the gumline
- Use small circular or short back-and-forth strokes, concentrating at the gumline
- Work from the back of the mouth forward: upper back molars and premolars first, then upper canines, then lower teeth
- Spend the most time on the upper back teeth — these accumulate plaque fastest in cats
- Inner surfaces are much less critical but should be brushed if tolerated
The complete session need not exceed 60-90 seconds if done consistently.
VOHC-Accepted Products for Cats
The Veterinary Oral Health Council (VOHC) awards its seal to products tested in controlled studies and shown to reduce plaque or tartar. VOHC-accepted products for cats include:
- Purina Pro Plan Veterinary Diets DH Dental Health feline formula
- Hill's t/d feline dental diet
- CET chews for cats
- Specific Greenies feline formulations
Dental diet note: Dental diets work by providing a specific kibble texture that mechanically abrades the tooth surface as the cat chews through the entire piece. Standard kibble fractures and does not provide this effect.
Water Additives
Several VOHC-accepted water additives are available for cats. They reduce bacterial populations in the oral environment and provide modest plaque-reduction benefit. Some cats object to the taste and reduce water intake, which in cats — already prone to inadequate hydration — is a significant concern. If water intake drops when using an additive, discontinue it.
Professional Dental Cleanings in Cats
Professional dental cleaning (COHAT) in cats requires general anaesthesia, for the same reasons as in dogs. The procedure includes:
- Supragingival and subgingival scaling
- Full-mouth dental radiographs — essential for detecting tooth resorption, which may look normal on the crown surface while extensive resorption occurs at the root
- Periodontal probing of each tooth
- Extraction of resorptive, mobile, or severely affected teeth
- Polishing and fluoride treatment
Full-mouth radiographs are not optional. The AVDC considers them the standard of care for every feline dental cleaning. Studies show that between 27% and 38% of clinically normal-appearing cat teeth have significant disease visible only on x-ray. A dental cleaning without radiographs misses a substantial proportion of actionable findings.
How Often Cats Need Professional Cleaning
| Cat Category | Suggested Cleaning Frequency |
|---|---|
| Cats with excellent home care and no disease | Every 2-3 years |
| Most adult cats without dedicated home care | Annually |
| Cats with known periodontal disease or resorption | Every 6-12 months |
| Senior cats (over 10 years) | Every 6-12 months |
| Cats with a history of stomatitis | As recommended post-treatment |
Recognising Dental Disease in Cats
| Sign | What It Suggests |
|---|---|
| Bad breath | Bacterial load from gingivitis or periodontitis |
| Brown/yellow tartar on teeth | Calculus buildup — professional cleaning warranted |
| Red gum line (especially bright red stripe) | Active gingivitis; may indicate early stomatitis |
| Pink-red erosion at base of tooth | Possible tooth resorption |
| Jaw chattering when eating | Tooth sensitivity — possible resorption |
| Drooling | Oral pain or stomatitis |
| Dropping food while eating | Dental pain |
| Eating only on one side | Dental pain on the avoided side |
| Reduced grooming | Oral pain making head/face grooming uncomfortable |
| Weight loss + poor coat | Often systemic effect of chronic oral pain |
| Pawing at the mouth | Oral pain |
Deciduous (Baby) Tooth Retention
Cats have 26 deciduous teeth, replaced by 30 permanent teeth between 3 and 7 months of age. In some cats, deciduous teeth fail to fall out when permanent teeth erupt — a condition called retained deciduous teeth. The most commonly retained teeth are the upper canines.
Retained deciduous teeth crowd the permanent teeth, accumulate food and plaque in the narrowed space, and contribute to abnormal bite. They should be extracted, typically during the spay or neuter procedure at 5-6 months. Notify your vet if you notice two teeth in the same position in the mouth (the "shark tooth" appearance).
References
American Association of Feline Practitioners (AAFP). (2020). AAFP Feline Life Stage Guidelines. https://catvets.com
American Veterinary Dental College. (2022). Tooth Resorption. https://www.avdc.org/tooth-resorption/
Lommer, M.J. (2013). "Oral inflammation in small animals." Veterinary Clinics of North America: Small Animal Practice, 43(3), 555–571. https://doi.org/10.1016/j.cvsm.2013.02.005
Veterinary Oral Health Council. (2023). VOHC Accepted Products for Cats. http://www.vohc.org
Gracis, M. (2016). "Feline tooth resorption." Veterinary Clinics of North America: Small Animal Practice, 46(5), 1011–1029.
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Frequently Asked Questions
How common is dental disease in cats?
The American Association of Feline Practitioners estimates that 50-90% of cats over age 4 have some form of dental disease, with prevalence increasing with age. Tooth resorption — a painful, progressive destruction of tooth structure — affects 20-60% of cats. Unlike dogs, cats typically hide dental pain, continuing to eat even with significant disease.
What is tooth resorption in cats?
Tooth resorption (formerly called FORL) is a painful condition in which odontoclast cells abnormally destroy the enamel, dentine, and root structure of permanent teeth. Early lesions appear as pink-red erosions at the base of the tooth. The condition is progressive and irreversible — affected teeth cause significant pain and must be extracted. It affects 20-60% of cats at some point in their lives.
How do I brush my cat's teeth?
Use a finger brush or small-headed cat toothbrush with enzymatic cat toothpaste. Condition your cat gradually: first let them lick toothpaste from your finger, then rub a toothpaste-coated finger along the outer teeth, then introduce the brush. Focus on the upper back teeth (molars and premolars) and canines, where plaque accumulates fastest. Brush at a 45-degree angle to the gumline with small circular strokes. Daily brushing is ideal; three times per week is the recommended minimum.
Does my cat need dental x-rays at the vet?
Yes. The American Veterinary Dental College considers full-mouth dental radiographs the standard of care for every feline dental cleaning. Studies show 27-38% of clinically normal-appearing cat teeth have significant disease only detectable on x-ray, particularly tooth resorption affecting roots beneath normal-looking crowns. A dental cleaning without radiographs misses a substantial proportion of disease.
How often should cats have professional dental cleanings?
Cats with dedicated home care and no known disease may only need cleaning every 2-3 years. Most adult cats without consistent home dental care benefit from annual professional cleaning. Cats with known periodontal disease, tooth resorption, or senior cats over 10 years should be cleaned every 6-12 months.
What are the signs of dental pain in cats?
Cats rarely show obvious pain. Signs indicating a dental examination is needed include: jaw chattering or head tilting when eating, dropping food, eating only on one side of the mouth, reduced self-grooming (particularly around the face and head), drooling, bad breath, visible tartar or red gumline, pink erosions at the base of teeth, weight loss, and withdrawal or reduced activity. Cats with severe dental disease often feel dramatically better after treatment.