Pressure Ulcer Formation Prevention in Paraplegics Using Computer and Sensory Substitution Via the Tongue.

Inclusion Criteria: * patient affiliated to social security or similarly regime * paraplegic medullary patient * more or equal than 18 years old. Exclusion Criteria: patients will be excluded if at least one of the following criteria is present : * pregnancy and feeding women * persons without liberty by administrative or judiciary decision * persons hospitalized without consent * persons concerned by a justice protection action * dependant major person * palatine prosthesis intolerance * buttock pressure ulcer evolution * acute pathology (particularly mouth level) * nickel allergy * impossibility to use the medical device, to understand or realize the protocol due to cognitive pathologies. * patient with dental troubles incompatible with the realisation or utilisation of orthodontic prothesis. * no tactile feeling with tongue, * impossibility to set up the orthodontic prothesis due to superior limb deterioration