Les actes papiers peuvent être commandés à l'adresse suivante : http://www.utc.fr/tice2004/commande_actes_tice2004.docIn this paper we present a part of an orthopaedic surgerylearning environment which is its didactical component. We study the architecture of this component, who will be added like a learning level plugged to a tool for simulation of planning of screwing trajectory. Enrich this tool will allow the student to use it in order to acquire the experience of the surgical decision-making for the planning of screwing (procedural part of the surgical act). We model surgical knowledge with the knowledge's model ck¢, in order to integrate it in the architecture of the component. This architecture represents knowledge as agents and will...