Patent ID: 8894411

Claim:
A dental system for preparing and displacing tissue, comprising: a dental handpiece comprising a drive; a handpiece coupling; and a tool shaped and dimensioned for selective insertion in the dental handpiece coupling, wherein the dental handpiece coupling and the tool are driven by the drive in an oscillating manner and wherein the tool comprises a cutting tool, the cutting tool is a bone saw having cutting edges of cutting blades arranged on opposite sides of a central plane M, such that when viewed from a position a, an angle α, from a longitudinal axis, spaces each of the cutting blades on either side of the central plane M, such that the angle α for cutting edges opens to the left in a first direction at one end of a tool body and opens to the right in a second direction at another end of the tool body, wherein the angle α is greater in the case of a first inner cutting edge than in the case of a second outer cutting edge on either end of the tool body taken from a center line, and wherein when viewed from a position b, the cutting edges of the cutting blades on opposite sides of the central plane M form with the central plane M an acute angle β, acute angle β opens towards an edge of the tool body in such a way that the cutting edges are on opposite sides of the central plane M and project over different sides of the central plane M and wherein the cutting edges of the cutting blades follow one another in a sequence in a longitudinal direction of the tool body.