If you have a broken tooth, see your dentist as soon as possible. Your dentist will be able to see if a cavity caused the break, and if the tooth's nerve is damaged.  A damaged nerve usually will require root canal treatment.

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  Rinse your mouth with warm water.
• Apply pressure with a piece of gauze on any bleeding areas for about 10 minutes or until the bleeding stops. If this doesn’t work, wet a fresh teabag, and apply pressure on the teabag to stop the bleeding.
• Apply a cold pack to the cheek or lips over the broken tooth. This will help reduce swelling and relieve pain.
• If you can't get to your dentist right away, cover the part of the tooth that is in your mouth with temporary dental filling available from a pharmacy.
• Take over-the-counter pain relief.

After your dentist has examined your broken tooth he may replace the piece of tooth that broke off with a white filling. Fillings should not only be functional, but also natural looking.  Many people don’t want silver fillings that show when they laugh or smile.