Total toothlessness too lately or wrongfully compensated remain at the origin of prosthetic problems often difficult to solve through conventional prosthesis. We shall explain the importance of implantology in this type of medication. After presenting the different solutions brought by the importance in the rehabilitation of toothless maxilla we shall describe the process of making a supra-implanted lower maxilla prosthesis. Applications and non-applications will be directed; then the different elements and stages of the making of this type of this mucous-membrane-held prosthesis will be described. The retention is assured by two hooks tightly clasped onto a crossbar supported by the implants.