Patent ID: 6186787
Filing Date: 2001-02-13
Classification: A61C,Y10T

Abstract:
A dental instrument comprisinga rotatably arranged shaft having a first end and a second end with a longitudinal rotational axis extending between said first and second ends, anda head coupled to said shaft for rotation about said rotational axis of said shaft with said shaft and said head being so dimensioned to be used to remove material from a tooth, said head being equipped with a plurality of at least five cutting blades, each of said cutting blades having a cutting edge facing in a first rotational direction, a first surface extending in a first rotational direction from said cutting edge and a second surface extending in a second opposite rotational direction from said cutting edge, each of said cutting edges is followed by a planar external surface area of said first surface in said first rotational direction to form a clearance angle of 0.degree. for each of said cutting edges so that said external surfaces can be propped onto a tooth surface.