A rotary osteotome (36) configured to continuously rotate at high speed in a milling direction to enlarge an osteotomy (32), comprising: a rod (40) that establishes a longitudinal axis (A) of rotation for said osteotome (36) rotary, a body (42) extending from said rod (40), said body (42) has an apical end (48) away from said rod (40) and a conically conical profile that decreases from a maximum diameter adjacent to said rod (40) to a minimum diameter adjacent to said apical end (48), a plurality of helical spiral grooves (62) arranged around said body (42), a plurality of surfaces, each of said surfaces formed between grooves ( 62) adjacent, each of said surfaces has a working edge (72) that twists helically around said body (42) in a direction that moves away from the milling direction as said di conical meter, said working edges (72) configured to radially move the surrounding bone material through compaction when said osteotome (36) is pushed into an osteotomy (32) rotating in the direction of high speed milling, characterized by said apical end (48) of said body (42) which includes at least one abrasive lip (50) extending radially from said longitudinal axis (A) adjacent to one of said working edges (72), a radially outer portion of said abrasive lip (50) configured to grind bone material as said body (42) advances towards osteotomy (32) in the direction of high speed milling, said abrasive lip (50) having a first rear flank (54) generally flat, said first rear flank (54) inclined from said abrasive lip (50) at a first angle, and a second rear flank (56) generally flat that falls from said first rear flank (54) in a second An angle smaller than said first angle, a plurality of said grooves (62) that open directly on said second rear flank (56) to receive and then channel upward the bone remains produced by said abrasive lip (50) when said end (48) apical is pushed to high-speed rotation in the osteotomy (32), said working edges (72) additionally configured to s
