Patent ID: 7717710

Claim:
A dental instrument comprising: a shaft ( 1 ); and a working member ( 2 ) which is secured to the shaft, said dental instrument having a longitudinal axis of rotation, said dental instrument being sized and configured to perform a dental procedure in a person's mouth, said dental instrument being sized and configured to rotate at a high speed effective to perform said dental procedure, wherein at least part of the working member ( 2 ) is made from a ceramic material, characterized in that at least one cutting edge and/or toothing consisting of the ceramic material is provided in the outer surface of the at least part of the working member ( 2 ) that is made from the ceramic material such that the at least one cutting edge and/or toothing consisting of the ceramic material is adapted to perform a cutting function during the dental procedure, wherein the at least part of the working member ( 2 ) made from the ceramic material and containing the at least one cutting edge and/or toothing consisting of the ceramic material has a surface roughness of 0.5 μm to 6 μm.