The provisional prosthesis is an essential prerequisite that provides crucial information for the realization of permanent prostheses both in terms of the periodontal environment and from an aesthetic and functional point of view. Several techniques now allow the realization of the provisional prosthesis. The choice between these different techniques is guided by the operating conditions, the requirements of the patient, as well as the knowledge of the practitioner and the prosthetist. Among the techniques that have essential advantages both aesthetically, mechanically and psychologically is the shell technique, which consists of making the provisional prosthesis on the plaster model and then adapting it in the mouth. This article will present in detail the principle of this technique, its advantages and main indications, as well as the implementation technique.