A surgical bur including primary flutes (58) and auxiliary flutes (52). The primary flutes include (i) first clearance surfaces (70, 72), and (ii) first rake surfaces (74, 76) with first cutting edges (86). The primary flutes extend from a proximal end (60) of the surgical bur to a distal end (62) of the surgical bur. The auxiliary flutes are localized in central regions or distal regions of the surgical bur. The auxiliary flutes include (i) second clearance surfaces (90), and (ii) second rake surfaces (94) with second cutting edges (96). At least one of the auxiliary flutes is located between a pair of adjacent ones of the primary flutes.
