When I bite down I have a sharp pain in my tooth. What could be wrong?

Pain associated with chewing pressure, or pain on releasing after biting down, is often indicative of a cracked tooth. Cracked teeth can result from very large fillings with weakened supporting walls, trauma, extensive wear from grinding or clenching, or eating ice. Full coverage placement of a crown restoration is often indicated to encircle the tooth and prevent the flexing of these walls that causes pain. If the crack runs towards the nerve of the tooth, root canal therapy maybe needed. If you find yourself avoiding an area, or chewing only on one side, let your dentist know.