What is odontoma in dogs and cats?

Odontoma is a benign odontogenic lesion arising from abnormal tooth development. It forms an unusual tissue mass or hard growth in the oral cavity; imaging and pathology are required for confirmation, and a vet will advise whether treatment is needed.

What tests are needed when an oral mass is found?

The vet will typically start with an oral examination and dental X-rays; a CT scan or biopsy under anaesthesia may follow to obtain a pathology report and guide the treatment and monitoring plan.

How long does follow-up after treatment usually take?

The duration of treatment and follow-up depends on the pathology results and the extent of surgery. In general, check-ups and imaging are needed over several weeks to months after the procedure; your vet will advise on the appropriate frequency.

What can owners do to prepare before the vet visit?

Bring videos of eating and oral views, note when symptoms were first observed and how they have changed, carry any previous imaging or pathology reports, and prepare a list of current medications and supplements to help speed up the consultation.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Odontoma in Dogs & Cats: Oral Mass, Imaging Diagnosis & Treatment Care [2025]

Odontoma is a benign overgrowth of dental tissue; treatment is often unnecessary, but surgical removal may be recommended if it affects the bite.

Take 1 minute to check the symptoms first

Last updated: 2026/01/06

Pethealthmap Editorial Team

Sources: WSAVA, National Taiwan University Veterinary Hospital

When to See a Vet

Seek emergency care immediately

•Complete refusal to eat accompanied by lethargy or depression
•Heavy oral bleeding that is difficult to stop
•Rapidly enlarging swelling of the cheek or jaw affecting breathing

Schedule a clinic visit soon (within 24–72 hours)

•Frequent dropping of food or a noticeably reduced appetite during meals
•Persistent bad breath or excessive drooling that interferes with eating
•Visible mass in the mouth or displacement of teeth

01What Symptoms Indicate a Problem?

Odontomas in dogs and cats typically appear in the oral cavity and may cause local discomfort or affect overall appetite and energy levels.

Reduced food intake, selective eating, or refusing food
Decreased activity, increased lethargy, or loss of interest in play
Bad breath, drooling, or occasional bleeding from the mouth
Localised swelling of the jaw or cheek, or abnormal tooth alignment
Weight loss, or changes in elimination habits and general demeanour

02How to Assess an Abnormality at Home: Key Observations and When to Seek Emergency Care

Observing and documenting key details at home before your vet visit helps the veterinarian assess the condition more quickly and plan appropriate tests.

Note the date you first noticed the oral abnormality or symptom
Record short videos of your pet eating and close-ups of the mouth (side and front views)
Weigh your pet and track changes in meal portions and eating behaviour
Monitor for noticeable changes in urination, defecation, or water intake
If there is oral bleeding, photograph it and preserve any blood-stained material
Book a clinic visit that offers dental X-rays or an oral examination as early as possible

03How Will the Vet Diagnose This? Common Diagnostic Tests

After arrival, the vet will begin with an oral examination and imaging; a pathology workup may follow to confirm the diagnosis and assess the extent of the lesion.

Physical oral examination

visual inspection and palpation of the gums, mucosa, and any visible mass

Dental X-rays

evaluate tooth roots, alveolar bone, and localised bony changes

CT scan

assess the extent of the lesion and any bone invasion (when indicated)

Haematology and biochemistry

assess overall health and anaesthetic risk

Biopsy under anaesthesia

tissue sampling sent to pathology to confirm type and guide treatment

Referral to a clinic with dental or oncology expertise is recommended for further evaluation

04Treatment and Post-Diagnosis Care: Medications, Diet, and Home Care Guide

Treatment is guided by the pathology report and imaging findings; post-operative care focuses on pain management, wound healing, and scheduled imaging follow-up.

Discuss surgical removal or conservative monitoring based on the pathology report
Schedule regular post-operative check-ups to monitor wound healing and oral mucosa recovery
Administer pain relief and antibiotics as directed by your vet, and monitor for side effects
Transition to soft or easily chewable food to reduce oral discomfort
Schedule imaging follow-up (X-ray or CT) to evaluate for recurrence or progression
Referral to a dental or oncology specialist may be arranged if further management is needed

05What to Prepare Before the Vet Visit: Key Information to Help Your Vet Quickly Assess the Cause

Write down when you first noticed the issue and how symptoms have changed over time

Bring short videos of your pet eating and oral views (front and side) for the vet's reference

Prepare a list of all current medications, supplements, and known allergies

Bring any previous X-rays, CT scans, or pathology reports if available

Use a secure carrier or lead when travelling to reduce stress and prevent your pet from struggling

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.