Abstract: The invention relates to a device for treating the pulp-canals and -chamber of a tooth, the crown of which presents a previously opened pulp-chamber in which said canals open, comprising an apparatus tightly adaptable to the crown of the tooth and providing in the pulp-chamber and the pulp-canals of said tooth for the circulation of a treating solution acting substantially upon the vasculo-nervous bundle or the necrotic magma of the tooth, the pressure of the treating solution being subjected within the pulp-chamber and the pulp-canals to periodical impulses combined to oscillations of substantially higher frequency.