Dental handpiece

Abstract

A dental handpiece is a dental handpiece configured to drive a cutting tool to rotate the cutting tool. The dental handpiece includes: a head configured to accommodate the cutting tool rotatably, a first bearing provided on an insertion side on which the cutting tool is inserted into the head, and configured to hold the cutting tool rotatably, a second bearing provided on a side opposite to the insertion side of the head and configured to hold the cutting tool rotatably, and a driving mechanism configured to rotate the cutting tool held by the first and second bearings. The first and second bearings each have a cage to hold balls, each cage being formed of a different material.

Dependencies are inferred from the claim text.