Described is a surgical instrument (1) for cutting bone by means of ultrasonics which can be fixed at a handpiece. The instrument includes an instrument shaft (2) adapted to be fixed at the handpiece and an instrument tip (3) joining the instrument shaft. The instrument tip has a plurality of adjacent cutting teeth (4). The leading flank (6) of each cutting tooth has a cut or a flattening (9). By this, a largely smooth and continuous (stutter-free) forward movement for cutting bone can be obtained.
