NNeither prevention nor the progress of technical means of restoration and / or replacement teeth can help prevent, ultimately, the removable denture many of our patients. Extending the life of the population is no stranger to this phenomenon. The total transitional prosthesis, either immediately or from old prostheses or evolve depending on the final extractions, are a key determinant of successful integration of our so-called permanent dentures. We will define the different objectives of this type of prostheses and their interest in the preparation preprosthetic and adaptation of our anatomical and functional restoration. In the clinical cases illustrating, we describe more precisely the indications and techniques for the preparation of the supporting tissues using these implants put in condition.