The invention relates to a dental instrument with a working area (2) and a shank (3), wherein the working area (2) with abrasive particles, particularly diamond particles or hard metal particles, occupied, comprising a rounded tip (4) having a first radius (R1) , a way to the top (4) subsequent first concave portion (5) having a second radius (R2), followed by a at the first concave portion (5) convex portion (6) with a third radius (R3) and a to at the convex portion (6) adjacent the second concave portion (7) with a fourth radius (R4).
