Why a Broken Tooth Is Always a Veterinary Matter
It is not unusual for owners to discover a chipped or broken tooth in their dog and assume it is a minor issue — after all, the dog seems fine and is still eating happily. Unfortunately, tooth fractures in dogs are rarely trivial. Depending on the extent of the break, a fractured tooth can expose sensitive dentine, or even the pulp — the living tissue at the core of the tooth — to bacteria, leading to infection, chronic pain, and in some cases serious systemic illness.
Dogs are also highly adept at masking pain. A dog continuing to eat should not be taken as a sign that a broken tooth is not causing discomfort. Many dogs with significant dental pain show no obvious outward signs at all. If you notice a broken tooth, veterinary assessment is always the right course of action.
Types of Tooth Fracture in Dogs
Dental fractures are classified according to which layers of the tooth are affected:
Uncomplicated Crown Fracture
This involves a break that extends through the enamel (the hard outer layer) and into the dentine beneath, but does not expose the pulp. Whilst these fractures do not immediately compromise the pulp, exposed dentine is porous and sensitive, and bacteria can track towards the pulp over time. Treatment is still recommended.
Complicated Crown Fracture
This type of fracture extends all the way to the pulp, exposing the living tissue inside the tooth. A pink or red dot — or a dark discolouration — at the centre of a broken tooth surface is a tell-tale sign. Complicated crown fractures are painful and carry a high risk of infection and abscess formation. Treatment is urgent.
Slab Fracture
Slab fractures are among the most common serious dental injuries in dogs. They occur when a large portion of the tooth crown shears away, typically from the side, often exposing a wide area of dentine or pulp. The upper fourth premolar — the large carnassial tooth — is the most commonly affected tooth, and slab fractures here frequently involve pulp exposure. Dogs that chew very hard objects are most at risk.
Root Fractures
Fractures can occur below the gum line, affecting the root of the tooth. These are not visible without dental X-rays and may only be suspected based on signs of pain or swelling around the jaw. They require prompt professional assessment.
Common Causes of Broken Teeth in Dogs
The most frequent cause of tooth fractures is chewing on objects that are too hard. This includes:
- Antlers (deer, elk, or other species) — now widely available but a common cause of slab fractures
- Cooked bones, which are harder and more brittle than raw bone
- Hard nylon chew toys
- Stones and rocks, which some dogs develop a habit of chewing
- Ice cubes given as treats
A useful rule of thumb often cited in veterinary dentistry is the "thumbnail test": if you cannot make an indent in the chew item with your thumbnail, it is too hard for your dog's teeth. Trauma — such as road traffic accidents, falls, or knocks — can also cause fractures, as can aggressive play between dogs.
Signs of a Broken or Painful Tooth
As noted above, many dogs show no obvious signs of dental pain. However, owners may notice:
- Preferring to chew on one side of the mouth
- Reluctance to pick up or chew toys they previously enjoyed
- Dropping food from the mouth whilst eating
- Pawing at the face or mouth
- Facial swelling, particularly below the eye (which may indicate abscess formation from an upper carnassial tooth)
- A draining tract — a small hole discharging fluid — on the skin beneath the eye
- Behaviour changes such as reluctance to be touched around the face, or unusual grumpiness
- Persistent bad breath
Treatment Options: Extraction Versus Root Canal
Once a broken tooth has been assessed — including dental X-rays to evaluate the extent of damage and root health — your vet will discuss treatment options. There are broadly two approaches:
Extraction
Extraction is the most commonly performed treatment for fractured teeth in general veterinary practice. The tooth is removed entirely under general anaesthesia. Whilst this is a permanent solution and eliminates the affected tooth as a source of pain and infection, it does mean the permanent loss of that tooth. For carnassial teeth, some functional change in chewing is possible, though most dogs adapt well.
Vital Pulp Therapy and Root Canal Treatment
Where the goal is to preserve the tooth, root canal treatment (endodontics) offers an alternative. This involves removing the infected or exposed pulp tissue, disinfecting the root canal, and sealing the tooth. Vital pulp therapy is a related procedure suitable specifically for recent fractures in younger dogs where the pulp is still living and healthy enough to respond to treatment.
These procedures require specialist expertise and equipment. Veterinary dental specialists — including those accredited by the European Veterinary Dental College (EVDC) — are available in many European countries and larger UK referral centres. Your vet can refer you if tooth preservation is a priority.
The right choice depends on the individual tooth, the extent of damage, the dog's age and overall health, and practical considerations for the owner. Your vet will guide you through the options.
What to Do If You Discover a Broken Tooth
If you find or suspect a broken tooth:
- Do not wait to see if it resolves — it will not heal on its own
- Contact your veterinary practice to arrange an assessment, ideally within a few days
- If there is visible swelling, discharge, or your dog is clearly in pain, seek same-day or next-day advice
- In the meantime, avoid giving your dog hard chews or toys that could worsen the fracture
Preventing Tooth Fractures
Prevention is straightforward once you know the main risk factors:
- Choose chew toys that are appropriately soft — rubber toys that give under pressure are generally safe
- Avoid antlers, cooked bones, hard nylon toys, and ice cubes
- If your dog has a habit of chewing stones, seek advice from a veterinary behaviourist on how to address this safely
- Have your dog's teeth checked at every annual health visit so that any existing damage is identified early
A broken tooth is always worth taking seriously. With prompt assessment and appropriate treatment, most dogs make a full recovery and return to comfortable eating and normal activity without issue.