Chewing on a cracked tooth can cause micro-movement of the affected fragments and changes in the dentine and pulp resulting in pulpal irritation. It is the release of biting pressure on the affected tooth that causes the sharp pain experienced by some patients. Over time, the pulp becomes irreversibly damaged and the tooth will hurt consistently even when not in function. Cracks are also pathways for bacteria ingress leading to infection of the pulp and its surrounding tissues.
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