I had a 4 tooth bridge put in 6 months ago. Today it broke between "teeth". Should I be charged to have it repaired/replaced?

Every dental office makes their own policy on fractured restorations. Your dentist will need to know exactly what happened when it broke to be able to assess the situation.

If the bridge is a finished ceramic or ceramic to metal bridge it should not have broken in the middle.If it was a composite or acyrlic temporary one..then the breakage may be due to the fact the final treatment was not completed.  But let's address the answer if it was a finished bridge.  Both your dentist and the lab should make good with a replacement at no charge to you if it broke under normal conditions (meaning excluding a tramatic accident, a blow to your teeth or the like).  Speak to your dentist, describe how it happened and a replacement should be done at no cost to you if the office is fair and understanding.

Most labs will guarantee their work for 1 to 5 years depending on the lab and material of the bridge.