Broken or Chipped Tooth in Dogs

A broken or chipped tooth is common in dogs, affecting roughly 1 in 5 to 1 in 4 dogs.^1,2 The key question is whether the break exposes the pulp, the living tissue inside the tooth. If it does (a pink, red or black spot in the broken surface), the tooth needs a root canal or extraction, even if your dog is eating normally, because exposed pulp becomes infected and painful.^3,2,4 A shallow chip with no pulp exposure may only need smoothing and sealing, plus an X-ray to make sure the root is healthy.^5,6 Most broken teeth come from chewing hard things like bones, antlers, hooves and hard nylon toys.^3,7

Types of Tooth Fracture

Why an Exposed Pulp Always Needs Treatment

Dogs hide dental pain well and often keep eating, so owners frequently notice the difference only after the tooth is treated.² Once the pulp is exposed, bacteria enter the tooth and travel to the root tip, where they cause an abscess. Antibiotics alone can't clear an infection sealed inside a root canal.³ Left alone, it can progress to bone infection.¹⁰ Veterinary dentists agree that fractured teeth with exposed pulp should be treated with a root canal or extracted.^10,11 See tooth abscess in dogs.

Which Teeth Break Most?

• Canine teeth (fangs) and the upper fourth premolar (the large cheek tooth, or carnassial) break most often, followed by the incisors.^5,10,3
• Slab fracture: the most common carnassial break, where the outer (cheek side) of the upper fourth premolar shears off. It often exposes the pulp.⁶
• In a lab study, upper fourth premolars broken by force mostly suffered complicated (pulp-exposing) fractures. Crown shape mattered more than breed, age or weight.¹

Causes

• Hard chews: real and nylon bones, antlers, cow hooves, hard plastic toys, rocks and ice cubes. Some dental vets also list bully sticks and very hard dried chews.^3,6,12,7
• Trauma: car accidents, falls, fights and being hit by an object.^3,9
• Cage or fence biting, which wears and weakens the canines until they break.^9,10

How to Choose Safer Chews

• Thumbnail test: you should be able to dent the chew with your fingernail. Antlers and hard nylon fail this test.^7,12
• Knee test: if it hurts when you tap the chew on your kneecap, it's too hard for your dog's teeth.¹²
• Bend test: skip chews and toys that don't bend.³
• Choose a chew sized for your dog, and supervise chewing.⁷
• Look for products accepted by the Veterinary Oral Health Council.^3,7

These tests are widely recommended by veterinary dentists but are based on expert experience, not formal studies.²

Treatment Options

• Root canal therapy: removes the infected pulp, disinfects and seals the tooth. The tooth stays in place and keeps working. One study reported a 94% long-term success rate.^11,5
• Vital pulp therapy: for very recent fractures, mostly in young dogs, the vet removes the top of the pulp and seals it to keep the tooth alive. Success was about 88% when done within 48 hours, but fell to about 41% within a week and 24% by three weeks, so a fresh break is a dental emergency.^13,8,3 Sources differ on the exact window, from hours to a couple of days.^10,5
• Extraction: removes the source of pain. Large teeth like the canines and carnassials need surgical extraction under anesthesia, with about two weeks of healing.^3,8 Extraction is also preferred when gum disease is advanced.¹¹
• Crowns: teeth treated with a root canal are more brittle, and a metal crown can protect them, especially in working dogs.^10,7
• Follow-up dental X-rays are needed after root canal or vital pulp therapy to confirm the tooth stays healthy.^10,13

Root canals are usually done by veterinary dentists, who can be found through the American Veterinary Dental College. Pet insurance often covers part of the cost.¹¹

Dental Wear: Attrition and Abrasion

• Attrition is wear from tooth-to-tooth contact, often from teeth that don't line up properly.^4,14
• Abrasion is wear from chewing other things. Tennis balls are a classic cause: grit stuck in the fuzz works like sandpaper.^4,14 Cage bars, rocks, bones and constant chewing at itchy skin also wear teeth down.^10,15
• When it matters: slow wear lets the tooth lay down a protective brown layer, which usually needs no treatment. Fast wear can expose the pulp, which needs a root canal or extraction just like a fracture.^10,14
• Worn teeth should be checked with dental X-rays from time to time.¹⁴
• Prevention: swap textured balls for smooth rubber ones, limit cage biting, and treat itchy skin so your dog stops chewing at himself.^14,15

For daily care, see how to brush your dog's teeth and dog teeth and dental care.

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