[The place of the dentist in the chain of care. The call].

After a short summary of the circumstances that can arise a call for help, this article describes the different organisms able to intervene in case of an emergency situation: medical emergency units, firemen, other organisms and the means to contact them. The modalities of this call and its minimal and indispensable content are then repeated. The modalities are on one side description of the emergency situation and on the other side the geographical informations. When the message received, the organism called can adapt the means that need to be send to the emergency situation and can manage to send them on location as soon as possible.