Inclusion Criteria:  Bimaxillary edentulous patients Former bimaxillary CRP wearers (transitional or usage) Acceptance of the confiscation of the old prosthesis when the new prosthesis is placed in the mouth and during the 4 months the new prosthesis is worn. Signed informed consent  Exclusion Criteria:  Dependent patients (under guardianship or patients in EHPAD) Heavy pathologies Salivary pathologies (Gougerot-Sjögren syndrome) or asialia related to a medication. Patients with a pacemaker Skeletal class III with an anteroposterior shift of more than 1 cm Patients under court protection