Dental Feature: Crown Reduction

Picture of Dog  

Breed: Bull Terrier

Fenestration of the gingiva

The three-year-old Bull Terrier suffered from halitosis for several months prior to his regular veterinarian appointment. Upon evaluation of the dog’s oral malodor, his veterinarian observed discoloration above the left maxillary canine and referred him to a dental specialist.

The dog was diagnosed with a fenestration of the gingiva, caused by a malpositioned lower canine penetrating the upper jaw. In order to save his teeth, the best treatment included crown reduction and restoration of the mandibular canine to eliminate the maxillary penetration. In addition, flap surgery was needed, with the placement of freeze-dried cadaver allograft material in the palatal defect.

lingually displaced canine and fenestration
Left side of the mouth revealing lingually displaced canine and fenestration
12 mm palatal defect
12 mm palatal defect secondary to malpositioned mandibular canine
Maxillary intraoral film
Maxillary intraoral film revealing marked loss of alveolar support mesially

Crown reduction of the mandibular canine was performed using a high-speed water-cooled drill. Calcium hydroxide and glass ionomer cement was applied on top of the exposed pulp before the tooth was restored with light cured acrylic resin. Crown preparation for rubber-based impression was made. The metallic crown was delivered and cemented two weeks after the initial surgery.

reduction of the mandibular
Crown reduction of the mandibular canine removing the maxillary impingement
Graft in place
Post-operative intraoral film with graft in place
Moderate inflamation lower
Reduced crown metallic restoration

The maxillary canine palatal defect was exposed with two full thickness vertical incisions. The defect was ultrasonically cleaned and packed with Osteoallograft bone before closure.

one month after surgery
Follow-up one month after surgery; fenestration eliminated
Palatal defect healed
Palatal defect healed

Surgery was a success, and the palatal defect was eliminated. The prognosis is good as long as the owner continues to provide stringent daily plaque and tartar control.

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