Tooth breakage during preparation
When the affected tooth is evaluated your dentist knows whether its structure is strong enough to take a crown. If there is doubt, the existing filling may be replaced or the structure reinforced before shaping the tooth. Problems that occur during the preparation can be corrected at that time before taking the final impression.
Infection of the pulp of the gum
Infection may affect the teeth in two places:
In the soft tissue inside the tooth called the pulp
In the gums around the base of the teeth
Whenever the enamel is removed there is a small risk that the underlying pulp may die and become infected. If this occurs, the tooth may need root canal treatment. To avoid gum infection, additional steps may be needed in your dental hygiene routine, especially to clean completely under the bridge. Poor cleaning may cause gum recession, where the gum shrinks away from the neck of the tooth.