Intrinsically Stained Teeth

We often associate healthy teeth with a pearly white appearance. However, sometimes teeth develop discolouration that can’t be cleaned away because the staining comes from within the tooth itself, a phenomenon known as intrinsic staining.

Characteristics & causes of discolouration

Intrinsically stained teeth may show unusual colours, such as pink, blue or grey. This discolouration can affect a small area of the crown or extend across the entire visible portion of the tooth. Discolouration results from changes within the tooth structure.

The crown of the tooth is typically covered by enamel, a tough material that appears solid white but is slightly translucent. Beneath the enamel lies dentine, the main substance of the tooth; this is off-white. Dentine is composed of millions of dentinal tubules—small tubes that run from the enamel to the tooth’s internal pulp.

Intrinsic staining occurs when material, such as blood, is forced up the tubules and becomes visible through the enamel.

“Intrinsically stained teeth may show unusual colours, such as pink, blue or grey.”

Trauma, bruising & the importance of veterinary examination

Trauma often leads to intrinsically stained teeth. When a tooth is injured, blood from the damaged pulp travels up the dentinal tubules, causing a pink hue if caught early. As time passes, the blood changes colour and the tooth may become more purple or grey.

If you notice a discoloured tooth, it’s crucial to schedule a thorough examination with a veterinarian. Early intervention and proper treatment are essential to maintaining your pet’s oral health and overall wellbeing.

“Trauma often leads to intrinsically stained teeth.”

Treatment Options for Non-vital Teeth

Unfortunately, most teeth with internal discolouration are non-vital (dead) or have irreversible pulpitis (in the process of dying). Non-vital teeth can cause issues for pets and require proper treatment.

Veterinary Dentists usually recommend one of two treatments for these teeth:

Meet the Author

Bec Tucker

Specialist Veterinary Dentist – BVSc (Hons) MANZCVS (Small Animal Dentistry and Oral Surgery)

Diplomate, American Veterinary Dental College™

Hi, I’m Dr Bec Tucker, and my journey into veterinary dentistry has been unexpected yet incredibly fulfilling. In fact, dentistry wasn’t on my radar at all when I graduated with a BVSc (Hons) from the University of Sydney in 2007. I was fortunate to meet veterinarians who had found their passion for dentistry, and their encouragement and enthusiasm shifted my perspective. Through continuing education lectures and workshops, I went from not fancying dentistry and oral surgery to genuinely loving it.

FAQs

My dog/cat’s tooth has turned pink/purple/grey—what does that mean?

That colour change is usually intrinsic staining (pigment from inside the tooth, not on the surface), often from pulp bruising/bleeding after trauma.

Is a discoloured tooth “dead”—and does it need treatment?

Most intrinsically stained teeth are non‑vital (dead) or have irreversible pulpitis, so veterinary dentists typically recommend either tooth‑preserving Root Canal Therapy or Extraction.

Can you clean or whiten a stained pet tooth?

If the stain is intrinsic, it can’t be cleaned off, because the pigment sits within dentine rather than on the enamel surface.

How do you confirm if the tooth is alive—do we need X‑rays (or CT)?

Yes—intra‑oral dental X‑rays are essential to assess the pulp and surrounding bone, and some complex cases benefit from CT. See Dental & Oral Imaging.

Is this urgent if my pet is still eating normally?

Pets often hide oral pain, so if you suspect intrinsic staining of the teeth, it’s best to consult your veterinarian.

Key Takeaways

Not just surface stain

Pink/purple/grey discolouration usually comes from inside the tooth (blood/pigment within dentine), so it can’t be polished off.

Often non‑vital

Most intrinsically stained teeth are dead or dying (irreversible pulpitis) and need treatment—typically root canal therapy or extraction.

Why it happens

Trauma can bruise the pulp, with blood travelling up dentinal tubules and changing colour over time (pink → purple/grey).

Imaging matters

Intra‑oral dental X‑rays are essential to assess the pulp and roots, with CT used for complex cases.

Next steps

For Pet Owners

Are you concerned about your pet’s dental health? Call 1300 866 848 or fill out the contact form. We’ll coordinate with your primary vet to ensure the best outcome.

For Vets & Nurses

We’re here to help. If you’d like to refer a patient, please call us at 1300 866 848 , complete the referral form or email us with a brief case summary, relevant radiographs and lab results.

For advice and treatment guidance, email us with a brief case summary, relevant radiographs and lab results.

 


Refer a Patient Contact Us

Advanced Veterinary Dental Services

A comprehensive range of dental and oral surgery treatments.

Contact Us    Refer A Patient
Complex Anaesthesia

We assess each patient individually, considering their health history, age and any concurrent medical conditions, to tailor the anaesthetic approach to their specific needs.

Surgical Extractions

Removing complex teeth safely and with minimal impact.

Vital Pulpotomy

A vital pulpotomy is a time-sensitive procedure used to preserve the life of a tooth when the pulp becomes exposed due to trauma or dental treatment.

Jaw Fractures

Jaw fractures in pets require precise treatment to restore both structure and function, with a strong focus on proper bite alignment.

Periodontal Treatment

Periodontal treatment goes beyond routine dental care to address the deeper damage caused by advanced gum disease.

Oral Surgery

Pet oral surgery can help treat dental problems, injuries, and other conditions affecting your pet’s mouth. Learn about the available procedures and how they can improve your pet’s comfort and oral health.

Dental and Oral Imaging

Dental and oral imaging helps veterinarians identify dental problems that may not be visible during a routine examination. Learn how these imaging techniques support accurate diagnosis and effective treatment for your pet.

Root Canal Therapy

Root canal therapy can help save a damaged or infected tooth while relieving pain in pets. Learn how this dental procedure works and how it can help preserve your pet’s natural teeth and oral health.

Gingivoplasty

This procedure involves reshaping gum tissue to guide the eruption of canine teeth into a correct position, preventing traumatic occlusion and avoiding more invasive treatments.

Crown Height Reduction

Reducing the height of misaligned canine teeth and protecting the exposed pulp with a filling helps prevent chronic pain, preserve jaw structure and avoid extraction.

Inclined Plane – Crown Extensions

Orthodontic appliances like inclined planes or crown extensions can reposition misaligned canine teeth, preventing trauma and preserving tooth function without altering their shape.

Dog Braces (Orthodontics)

To address mesioverted  (‘lanced’ maxillary canine teeth) and manage linguoversion when the maxillary diastema (the space between the third incisor and canine teeth) is too narrow.

Restorations

Restorative dentistry repairs damaged teeth in pets, often using crowns, veneers and fillings. These procedures restore dental structure and function, ensuring long-term oral health.

Professional Dental Cleaning

Thorough cleaning and examination under anesthesia remove plaque and calculus, preventing periodontal disease and ensuring long-term oral health in pets.

Mandibulectomies and Maxillectomies

These surgeries involve partial or complete removal of the jaw to treat malignant oral tumours. Treatment options vary and may include surgery, chemotherapy or radiation.

Crown Amputation for Tooth Resorption

This procedure, often used for tooth resorption, involves removing the tooth crown while leaving the resorbing root remnant intact. It’s less invasive and used in cases where traditional extraction is no longer possible. Regular follow-up is recommended.