Abstract: The present invention relates to a rotating instrument made of a ceramic material and comprising a shaft 1 and a working member 2 which is secured to the shaft or can detachably be secured thereto, wherein at least part of the working member 2 is made from a ceramic material, characterized in that the ceramic part of the working member 2 has a surface roughness of 0.5 ?m to 6 ?m.

Abstract: An acoustically activated dental instrument that comprises a working head attached to a shaft, the working head being covered with abrasive particles at its front end portion and having a spherical basic shape at its distal end, the outside of which is covered with abrasive particles. The working head is flattened at an upper side substantially up to a center plane of the spherical basic shape, and is flattened on the lower side opposite to the upper flattened side.

Abstract: A trepan drill that comprises a shaft that includes a clamping portion, and a head that comprises a substantially cylinder barrel shaped core bit and a distal end. The distal end includes a first tooth, a second tooth, and a third tooth that each respectively has a cutting edge. The teeth each have different axial teeth heights and are arranged alternatingly in a circumferential direction.

Abstract: A bone graft drill includes a shaft with a shaft axis, and a head with a rear side connected to the shaft and being shaped substantially conical at a front portion. A guiding tip is formed at a front end of the head, and a chipping recess is also formed in the head with an axis being inclined diagonally with respect to the shaft axis. The chipping recess has an edge constituting at least one cutting edge and an opening toward the rear side of the head.

Abstract: The invention relates to a method of manufacturing a surgical instrument having a rotatable shaft 2 and a working part 1 disposed thereon, the working part having at least one cutting edge, wherein the shaft 2 and the working part 1 are made of oxide ceramics, characterized in that for the manufacturing of the contour of the instrument, a rough grinding using a grinding tool having a grain size between 40 ?m and 110 ?m is performed, and subsequently, a fine grinding of the cutting edges using a grinding tool having a grain size between 20 ?m and 50 ?m performed.

Abstract: The invention refers to a dental drill comprising a head provided with cutting edges, which has an at least rounded basic shape, wherein two of the cutting edges at the front side merge into a transitional cutting edge, characterized in that the dental drill is made of a plastics material which has a hardness between 60 and 250 Knoop.

Abstract: The invention relates to a dental drill comprising a shaft as well as a head being provided with a plurality of cutting edges extending lengthwise of the head, wherein the cutting edges are provided with at least one cross-cut at a middle portion of the head.

Abstract: The invention relates to a method of manufacturing a surgical instrument having a rotatable shaft 2 and a working part 1 disposed thereon, the working part having at least one cutting edge, wherein the shaft 2 and the working part 1 are made of oxide ceramics, characterized in that for the manufacturing of the contour of the instrument, a rough grinding using a grinding tool having a grain size between 40 ?m and 110 ?m is performed, and subsequently, a fine grinding of the cutting edges using a grinding tool having a grain size between 20 ?m and 50 ?m performed.

Abstract: A milling tool 1, in particular a tubular drill, includes a shaft 2 and a working portion 3. At least one cutting edge 8 is provided at a face of the working portion 3 and at least one bore 4 extends into the face of the working portion 3. The axis of the bore 4 extends axially parallel or in an angle, preferably between 0° and 20°, with respect to an axis 5 of the tool 1.

Abstract: The invention relates to a root canal instrument having a shaft 1 being connected to a neck 2, a head 4 having at least one cutting edge 3 being arranged at the free end thereof, wherein the cutting edge 3 along the head 4 is provided with a positive twisting angle from a region facing the tip 5 of the head 4 and a negative twisting angle in a region facing the neck 2.

Abstract: The invention refers to a dental drill having a head 1 provided with cutting edges, the head having an at least rounded basic shape, wherein two of the cutting edges 2, 3 merge into a transitional cutting edge 4 at the front side, characterized in that the dental drill is made of a ceramic material and that the cutting edge chipping is between 2.5 and 7 ?m and the cutting edge base 5 has a radius between 0.03 and 0.12 mm.

Abstract: Root canal instrument sets and instruments having high loadability and high breakage safety.

Abstract: The present invention relates to a method of producing a surgical saw blade comprising a clamping portion and a working area provided with a toothing, wherein the clamping portion and the working area are produced by means of an etching method and the toothing is subsequently cut by means of a laser type cutting method.

Abstract: The present invention relates to a dental tool, in particular for grinding teeth, comprising a grinding head and a rotatingly drivable shaft, the grinding head being provided on its surface with at least one elevated portion which, during rotation of the grinding head works a surface to be prepared and defines a circle of rotation. The invention is characterized in that the elevated portion comprises an edge, and the edge is the side line of a surface that is situated at least at the leading side of the edge and that is retracted relative to the circle of rotation defined by the edge.

Abstract: The present invention relates to a dental tool, in particular for grinding teeth, comprising a grinding head and a rotatingly drivable shaft, the grinding head being provided on its surface with at least one elevated portion which, during rotation of the grinding head works a surface to be prepared and defines a circle of rotation. The invention is characterized in that the elevated portion comprises an edge, and the edge is the side line of a surface that is situated at least at the leading side of the edge and that is retracted relative to the circle of rotation defined by the edge.

Abstract: A dental instrument is provided with a pivotally arranged shaft and a head mounted to the shaft. The head is equipped with a plurality of cutting blades. The cutting blades have a clearance angle of 0° and a negative cutting angle. The areas of the blades that trail the cutting edges are either planar surfaces or a partially cylindrical shape. In some embodiments, the front area of head is provided with a circumferential groove that is open at the front side, into which an annular contact element (O-ring) is inserted. The contact element can have the shape of an elastic ring.

Abstract: The present invention relates to a dental drill comprising a shaft (2) and a cutting portion (3) provided with cutting edges. At the front side, the dental drill (1) comprises two main cutting edges (5) and, laterally on the cutting portion, a plurality of additional cutting edges (7). The main cutting edges (5) converge in a central axis of the dental drill and directly pass into two lateral cutting edges (8).