It consists in the use of Nitrous Oxide, as a means to sedate the patient, which allows him to enter a state of minimal depression of his level of consciousness, allowing him to breathe autonomously, without recourse to ventilation, as well as to respond to physical and verbal. It helps to provide the patient with a more comfortable, high-quality treatment, reducing their anxiety. It also allows you to provide a greater sense of well being and security, improving your cooperation and tolerance to longer treatments.