Nakanishi Inc.

Yukio Ito

Eiichi Nakanishi

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

Dental handpiece for injecting therapeutic agent containing powders

A dental handpiece having a detachable motor. The dental handpiece includes a handpiece body having a dental tool, a driving section detachably connected to the handpiece body, the driving section further including a motor for operatively driving the dental tool, and a motor casing having a substantially tubular wall for defining a motor cavity for accommodating the motor. The motor casing allows the motor to be inserted and removed in an axial direction including a fastener for holding the motor in position in the motor casing.

Growing community of inventors

Kanuma, Japan

Yukio Ito