Inclusion Criteria:  Be an adult person Be affiliated of granted of health insurance Be resident of a nursing home People (or the guardian) who received complete information about the research and who signed the consent form.  Exclusion Criteria:  People deprived of their liberty by justice's decision, or people following psychiatric treatment according to articles L. 3212-1 et L. 3213-1 of the French law People with insufficient skills in French People with total bimaxillary prosthesis People without any teeth