Fights, falls and flight injuries can bring about beak injuries that can come in the form of fractures, punctures, breakage or crushing. The part of the beak nearest the head contains a blood supply that may require cauterization. Nerve endings in a damaged beak can cause eating to be painful. Since a parrot uses its beak in everything it does this must be considered a very serious injury and requires the immediate attention of your avian veterinarian.
BUT… The good news is that beaks are repairable.
The use of acrylics and dental bonding reform and replace broken, cracked or missing beak parts and can give the injured bird every opportunity to carry on with a normal life until the beak tissue grows back. One of these cockatiels had its upper beak nearly ripped off by a congo african grey.