Use of 50% Nitrous Oxide / 50% Oxygen Premix in Primary Care Dental Centers

Inclusion Criteria: * anxious and/or phobic patients having a vomiting reflex * very young children requiring selective dental cares * mental deficient patient * patient having specific phobia linked to the dental care to be done * patient from 1 year old * ASA 1 or ASA 2 patient * existing of efficient contraception Exclusion Criteria: * ASA 3 or ASA 4 patient * patient already treated without using Kalinox's sedation * patient already included in this protocol in a delay lower than 7 days * contraindication linked to the experimental product * Kalinox's inhalation duration higher than 1 hour * pregnant or breast-feeding women