Patent ID: 6390816
Filing Date: 2002-05-21
Classification: A61C

Abstract:
A dental handpiece for injecting an air-powder mixture and water against teeth for dental treatment, comprising:a container for accommodating powders; an air supply line for supplying air into said container to produce a mixture of said powders and said air in the container; a mixture transfer line for transferring said mixture; a water supply line for transferring water; and an injection nozzle for injecting the mixture received from said mixture transfer line and the water received from said water supply line against a treatment site; wherein said container has a curved inner surface for allowing whirl of air spatially in all directions in the container, wherein said air supply line has a plurality of branched lines each extending in central part of the container to close proximity to the curved inner surface of the container, each of said branched lines having in its distal part a plurality of ports oriented to direct air flow therethrough along the curved inner surface of the container.