Fracture of the Mandible in Dogs

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Section: Overview

Fractures of the mandible (lower jaw) are usually the result of major trauma, especially to the head, but can be caused by disease of the bone itself, dental disease, or sometimes by the veterinarian during extraction of diseased teeth. These fractures can occur at any location along the length of the bone from the midpoint where the two halves of the mandible meet in the front, back to the temporo-mandibular joint (TMJ). The fractures can occur on both sides of the jaw at the same time. Many of these fractures are "open" but occasionally "closed" fractures do occur. Mandibular fractures can also be categorized as "simple" or "comminuted."

Depending on the nature of the fracture and the age of the animal, different methods of repair may be indicated for each situation. Mandibular fractures can have serious complications if not repaired or if the repair fails.

Radiographs of the mandible

No laboratory tests are required to make the diagnosis.
        
Treatment

Treatment for a fractured mandible varies depending on the area of the fracture and the severity. Since most mandibular fractures are trauma related, emergency care for concurrent problems caused by the trauma is often performed before mandibular fracture repair.

Some fractures of the mandible can be managed without surgery by placing a muzzle on the dog's snout, while some require anesthesia and surgical stabilization of the bone fragments for the best results.

If dental disease is suspected as the cause for the fracture, a full dental cleaning with extractions of some teeth may be required.

Injectable analgesics (pain medications) are given to the animal while being treated in the hospital and may be continued orally once discharged. Antibiotics are commonly given to minimize the chance for systemic infection from bacteria in the mouth.

Home Care and Prevention

With conservative management in a muzzle, or after surgical repair of the fracture, the dog should be kept restricted from activity for several weeks and fed only a soft gruel that does not require chewing.

A recheck appointment with the veterinarian will occur in several weeks to evaluate how the bone is healing (possibly with new radiographs), to monitor the dog's progress, and to make sure it is safe to return to a regular diet.

Many traumatic events are true accidents and thus unavoidable. Dental hygiene and routine cleaning by the veterinarian may prevent severe dental disease that could lead to mandibular fractures.

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