Food Under My Crown. You may be experiencing throbbing tooth pain under your crown for any number of reasons like. Brown and grey spots show up on the tooth material around a crown where pearly whites should be.
Steering clear of sticky sweet and hard foods after getting a crown may help lessen your pain. I have two posts but one crown to act for two teeth on the lower left molars. When these bacteria get underneath the crown they begin to convert any sugars that make their way into the crown to acids that eat away at enamel.
Its also possible you have an infection.
Food will collect under the bridge therefore it is imperative to use superfloss or floss threaders to clean under the bridge after each meal. Once the tooth has fractured the post inside of the tooth and the crown itself will continue to loosen. Hot and cold foods can also be triggers. The arrow in the picture points to where food gets trapped when there isnt adequate contact between your teeth.