Service

Jaw fractures in cats and dogs: stabilisation and splinting

A broken jaw in a cat or dog needs treatment, but the first priority is to assess and stabilise the animal’s general condition: breathing, bleeding, chest and head injuries. Once the patient is stable, I assess the fracture under anaesthesia with dental radiography and fix the fragments so that the teeth meet correctly again — the bite, or occlusion. That is what decides whether the animal can eat comfortably afterwards.

I choose the method of stabilisation according to the type and location of the fracture, the condition of the teeth near the fracture line, and the animal’s age and size. It may be symphyseal cerclage wiring, an intraoral composite splint, interdental wiring or other fixation when clinically indicated — and these are often combined.

Urgent

After an injury: general condition first, then the jaw

After a fall from height, a road accident or a fight, a broken jaw is only one of the possible injuries. It is more important to detect chest, head and internal injuries and shock in time, as they are not always obvious straight away.

So the first stop is a clinic that provides emergency care. Dental stabilisation is the next step, once the animal is stable and its condition allows anaesthesia. It should not be postponed for weeks: jaw fractures in tooth-bearing areas are mostly open, meaning they communicate with the mouth, and without fixation pain and the risk of infection increase.

1
Go to a clinic that provides emergency care, even if your pet seems lively
2
Transport without pressure on the face and jaw: a small pet in a carrier
3
Do not feed or force water before the examination
4
Once the general condition is stable: dental assessment and a fixation plan

Dental and jaw trauma →

Why jaws break: common causes

The cause of the injury shapes what I look for during the examination and how I plan treatment.

Falls from height in cats

A cat falls from a window or balcony and lands on its chin. Typical results are separation of the mandibular symphysis, a split hard palate, fractured canines and joint injuries.

Road accidents and blows

A heavy impact can cause multiple fractures of the lower and upper jaw, often together with chest and head injuries.

Bites

Small dogs and cats bitten by a large dog are especially vulnerable: deep tooth wounds combine with fractures and contaminated tissue.

A jaw weakened by periodontitis

In small dogs the roots of the large teeth take up much of the height of the lower jaw. Severe periodontitis destroys the bone around them, and the jaw can break from a jump, play or even during a meal.

Periodontal treatment helps prevent such fractures →

The main goal: teeth that meet correctly

A fracture can be “put together” so that the bones look straight on a radiograph while the teeth still meet incorrectly. The animal then cannot close its mouth properly or pick up food, and the teeth may injure the gums or palate. That is why my main reference point is the bite (occlusion): the fragments are aligned so that the teeth meet as they did before the injury.

The second goal is stability: the fragments must not move while the bone heals. The third is to do no harm: to protect the tooth roots, the blood vessels and nerve inside the lower jaw and, in young animals, the developing permanent teeth.

The bite as a guide

Alignment is checked by how the canines and side teeth meet, not by the radiograph alone.

Stable fixation

A splint or wire holds the fragments still for the whole healing period.

Respect for the roots

The method and fixation points are chosen so as not to damage tooth roots, vessels or the nerve.

Back to eating quickly

The fixation should let the animal eat — on its own or, if that is not possible, through a tube.

When to suspect a broken jaw

✓A cat has fallen from a window or balcony: blood from the mouth or nose, a split chin, the mouth does not close fully
✓A dog or cat after a road accident, a blow, a fall or a bite from another animal
✓The teeth no longer meet as they used to, or the jaw is shifted to one side or hangs open
✓Blood-stained drooling, facial swelling or asymmetry, pain while eating
✓A small dog with severe periodontitis whose jaw broke after minor force
✓Separation of the mandibular symphysis or a split hard palate in a cat
✓After-effects of an old injury: the teeth meet incorrectly or are loose where the fracture was

Symptoms that may indicate this procedure

Cannot close or open the mouth

A reason for an urgent examination, not for waiting.

More about problems opening or closing the mouth →

Facial or under-eye swelling

Often linked to a tooth — needs a prompt exam.

What to do about facial swelling →

Blood from the mouth or in saliva

Blood from the mouth needs a vet’s assessment.

About blood from the mouth or in saliva →

Food falling from the mouth

Food drops when chewing hurts.

Why food falls from the mouth →

How diagnosis works

✓Emergency assessment of the general condition before any dental work: breathing, circulation, chest, head, spine and limbs
✓Examination of the mouth under anaesthesia: fracture lines, mucosal wounds, how the teeth meet, movement of the jaws and joints
✓Dental radiography: the course of the fracture line, tooth roots within it, bone and periodontal condition
✓CT may be needed for multiple fractures, upper-jaw injuries or injuries to the temporomandibular joint
✓Pre-anaesthetic assessment of anaesthetic risk

How I stabilise a jaw fracture

✓Aligning the fragments by how the teeth meet: a correct bite is the main reference point
✓Fixation matched to the fracture type: symphyseal cerclage wiring, an intraoral composite splint, interdental wiring or other fixation when clinically indicated
✓A decision for each tooth in the fracture line: keep, treat or extract
✓Cleaning and closing mucosal wounds; closing a palatal split when clinically indicated
✓Checking the bite and radiographic control of fragment position after fixation

This is not a fixed menu: methods are often combined, and I make the final decision after radiographs under anaesthesia, in line with the plan agreed with you. If a complex fracture needs plates or an external fixator, a consultation with a veterinary surgeon may be needed.

Splint, wire or other fixation: how the method is chosen

There is no single right method for every fracture. I choose the fixation according to the location and direction of the fracture line, the number and condition of teeth available for anchorage, bone quality, and the animal’s age and size.

Symphyseal cerclage wiring

The classic approach for symphyseal separation in cats: a wire is passed around both halves of the lower jaw behind the canines and tightened under the chin. It is removed after healing.

Intraoral composite splint

Composite material is bonded to the tooth crowns on both sides of the fracture, sometimes over interdental wiring. The splint does not pass through bone, so it does not put the roots at risk.

Interdental wiring

Thin wire is placed around the necks of the teeth on both sides of the fracture line; it is usually combined with composite for extra strength.

Fixing the jaws together

For some fractures near the joint, the upper and lower jaws are temporarily joined with composite between the canines, leaving the mouth slightly open. A feeding tube may be needed during this period.

Other methods

A fixation muzzle as a temporary or supportive measure; plates or an external fixator for selected complex fractures where there are no teeth to anchor to. These are used when clinically indicated.

Dental radiography →

Why anaesthesia is needed

Diagnosis and fracture fixation are performed under inhalational anaesthesia with local dental blocks; the anaesthetic is given and monitored by a separate veterinary anaesthetist. It is planned only once the general condition is stable: chest or head injuries are treated first. Removing a splint or wire after healing usually also requires a short anaesthetic.

More on this: anaesthesia in veterinary dentistry.

Teeth in the fracture line: keep or extract

The fracture line often runs through a tooth socket or close to a root. I decide on each such tooth after dental radiographs: a healthy, stable tooth can help hold the fragments and anchor the splint, so we try to keep it.

A tooth is extracted if it has severe periodontitis, a root fracture or marked mobility, or if it prevents correct alignment of the fragments. Teeth kept in the injured area need monitoring: their pulp may have been damaged, and endodontic treatment may be needed later.

✓Keep: a stable tooth without a root fracture that helps stabilisation
✓Treat: a tooth with a fractured crown or affected pulp if it can be saved
✓Extract: a tooth with severe periodontitis, a root fracture or marked mobility

Endodontics and saving teeth →

Palatal splits and symphyseal separation in cats

After a fall from height, cats often have two injuries that owners may not notice: separation of the symphysis — the joint between the two halves of the lower jaw at the centre of the chin — and a lengthwise split in the hard palate.

Symphyseal separation is stabilised, most often with cerclage wire. A narrow palatal split may heal once the upper jaw is stable, while a wider one needs surgical closure. If it is not closed, a permanent connection between the mouth and nose — an oronasal fistula — may form: the cat sneezes and fluid or food comes out of the nose.

Oral surgery →

Feeding and recovery

Pain after stabilisation is controlled with an individual pain-relief plan. If the fixation allows, the animal eats on its own — the food should be soft, pâté-like or soaked.

A feeding tube may be needed if the jaws are temporarily joined together, if there are several injuries or if the animal refuses food. Food, water and medication are given through it until the animal eats on its own.

Healing time depends on age, fracture location and bone quality: bone heals faster in young animals and more slowly in small dogs with periodontitis. The splint or wire is removed when the jaw is stable and radiographs confirm healing; this usually takes several weeks.

✓Soft food only for the whole healing period
✓No bones, sticks, chews or tug-of-war games
✓Oral care as I advise — plaque builds up under a splint
✓Follow-up checks and radiographs at the agreed times
✓Removal of the splint or wire under a short anaesthetic, followed by polishing of the teeth

Possible complications — honestly

Even when stabilisation is done correctly, healing does not always go to plan. I explain these risks in advance, because some of them can be spotted and corrected in time.

✓Imperfect tooth contact after healing — sometimes individual teeth need correction
✓Slow healing or a fibrous rather than bony union — especially in a jaw weakened by periodontitis
✓Infection at the fracture site, including osteomyelitis, and loss of bone fragments
✓Loss of a tooth in the fracture line or death of its pulp, which may show up later
✓A splint loosening or breaking, gum inflammation beneath it
✓An oronasal fistula after a palatal injury
✓Reduced mouth opening after joint injuries
✓In young animals, disturbed development of permanent teeth in the injured area

Can a jaw fracture be prevented?

Some injuries can be prevented. For cats, strong safety nets on windows and balconies matter — an ordinary insect screen will not hold a cat.

For small dogs, prevention means treating periodontitis in time: the less bone is lost, the lower the risk of a pathological fracture. Before extracting teeth in areas where little bone is left, I assess it on radiographs and plan the procedure so as not to weaken the jaw further.

Tooth extraction for dogs and cats →

Technology and equipment

Dental radiographyIntraoral composite splintsCerclage and interdental wiringPiezosurgery when clinically indicated

Possible results

✓A restored, correct bite
✓Stable fragments and pain control
✓Conditions for a return to eating independently
✓Keeping the teeth that can be kept and removing those that hinder healing
✓A lower risk of complications such as infection, malunion or an oronasal fistula

What is needed after stabilisation

✓An individual pain-relief plan and written instructions
✓Soft food only for the whole healing period; no bones, chews, sticks or tug-of-war games
✓Care of the mouth and splint as I advise
✓A feeding tube may be needed if the animal does not eat on its own
✓Follow-up checks and dental radiographs to assess bone healing
✓Removal of the splint or wire once healing is confirmed

What affects the fee

The fee depends on the diagnosis and the extent of treatment: the number and type of fractures, the fixation method, teeth that need treatment or extraction, and whether further imaging is needed. It is calculated after examination and dental radiography — at that point I explain the whole plan, including follow-up checks and removal of the fixation.

More about fees

Frequently asked questions

It is not something to rely on. Without fixation the fragments move with every jaw movement, the animal is in pain, and the bone may heal in the wrong position or not heal at all — leaving the teeth meeting incorrectly. Some stable, non-displaced fractures, especially in young animals, are sometimes managed conservatively, but that decision is made only after radiographs.

Dental and jaw trauma

Yes. A good appetite does not rule out a broken jaw, a palatal split or a chest injury, which may not show straight away. Start with an examination at a clinic that provides emergency care and, if there are signs of a mouth injury, a dental assessment with dental radiographs.

Consultation

Usually several weeks. It depends on the animal’s age, the location and type of fracture, and bone quality. The splint or wire is removed when the jaw is clinically stable and follow-up radiographs confirm healing.

If the fixation does not join the jaws together, the animal usually eats soft food on its own. When the jaws are temporarily joined or the animal refuses food, a feeding tube may be needed — food, water and medication are given through it until the animal eats independently.

The usual cause is severe periodontitis. In small dogs the roots of the large teeth take up much of the height of the lower jaw, and periodontitis destroys the bone around them. The jaw becomes thin and fragile, and a jump or play can break it. These fractures are harder to heal, so treating periodontitis is also prevention.

Periodontology

Usually yes, but a short one. Under anaesthesia the splint or wire can be removed calmly, the teeth polished, healing assessed and follow-up radiographs taken if needed.

Anaesthesia and safety

First go to a clinic that provides emergency care: they will assess breathing, bleeding, the chest and head and give pain relief. Definitive jaw stabilisation is planned once the general condition is stable. If you need advice on the plan, message Anna on Telegram — in an online consultation I can suggest the next steps and timing.

Consultation and online consultation

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