Can you tell me are cracked mercury amalgam fillings dangerous?

No: Not any more dangerous or likely to cause discomfort than any cracked filling whatever the material it is made. Cracks of the filling usually result from the loss of underlying support in the form of dental caries - a cavity.

Nope...: But not restoring the tooth can cause a dental abscess, and that can become dangerous.. Have the tooth in question evaluated and restored.

Cracked filling: The cracked filling needs attention. You should not ignore this because your tooth will decay.The amalgam itself it not a problem and will not cause you harm. See a dentist asap, and get the tooth treated. Good luck.

No, but replace!: A cracked silver dental filling is a danger only in the sense that decay can reoccur under the old filling and if left untreated cause greater problems. There is no danger of the mercury acting as a toxic substance in you body, as once it has set as a silver amalgam, the mercury becomes non-reactive. Even if you swallow it, it will just pass thru. So just get it replaced ASAP.

Not dengerous: Most research finds no relationship between fillings and symptoms of mercury poisoning or other side effects. Eventually, any filling can fail and if not treated, this can lead to pain, infection, root canal and even tooth loss. see your dentist for refill.