Tooth Trauma

Definition

The crown of the tooth is a complex structure comprising of 3 separate components, enamel, dentine and pulp. Enamel forms the outer protective layer and is the hardest substance in the body. The underlying dentine is made up of tubules with nerve endings radiating from the pulp. The pulp is a living, highly sensitive tissue containing blood vessels and nerves. Damage to any of these structures is a potential concern. Trauma to the tooth may result in wear, discolouration or a broken tooth.

Wear to the tooth occurs as a result of recurrent abrasion. This can be caused by tooth to tooth contact (attrition) or inappropriate play or chewing activity such as chewing stones or the bars of a kennel and continuous play with tennis balls.

Purple, grey or pink teeth indicate that the pulp inside the tooth has bled staining the dentine. Most of these teeth need treatment as the pulp has been irreversibly damaged.

Fractured teeth result from sudden trauma to the tooth. The fracture may just involve the enamel, the enamel and dentine or all layers including the pulp. If the pulp is exposed the tooth will be extremely painful and need urgent treatment.

Diagnosis

Any change to the tooth needs to be assessed. A pink sheen at the fracture site or bleeding indicates the pulp is exposed. A black spot indicates the pulp is dying. Under a general anaesthetic, a probe is used to assess whether the pulp cavity is exposed or not. Any tooth with pulp exposure needs urgent attention and monitoring the tooth is never appropriate.

Treatment

Fractures involving the dentine are sensitive and need treatment. If the pulp is exposed in worn or fractured teeth, the root either needs endodontic (root canal) treatment or extraction and should never be ignored.

Prevention

To avoid fractures do not throw stones fr your dog and be careful about feeding bones. Wear can be avoided by using rubber balls instead of tennis balls for play.

BVDA

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