With proper care, a dental crown can provide you with years of aesthetic appeal and functionality. However, over time it may eventually start to break down. You may begin to notice that food is getting stuck where the gum line meets the crown, or the tooth suddenly becomes very sensitive to hot or cold food. This is a sign that your crown is loose and in need of a tune-up, Simply book an appointment with your dentist so that the extent of the damage can be assessed and repairs can be made.