Abstract: A method of drilling holes in bone and harvesting bone fragments for bone grafting utilizes a specially designed drill bit having a point angle of 115° to 120°; a lip relief angle approximately 10° to 14°, two or three flutes defining a helix angle from 13° to 17° at a distal end, and a helix angle of 31° to 35° in the proximal direction. The drill bit is rotated at less than 75 rpms, preferably less than 50 rpms. At such a slow rotation speed, cooling fluid is not necessary and the drill bit does not heat up sufficiently to cause necrosis of adjacent tissues. The helix angulation of the proximal portion of the drill bit facilitates harvesting bone fragments, which can be reused in bone grafting.

Abstract: A method of drilling holes in bone and harvesting bone fragments for bone grafting utilizes a specially designed drill bit having a point angle of 115° to 120°; a lip relief angle approximately 10° to 14°, two or three flutes defining a helix angle from 13° to 17° at a distal end, and a helix angle of 31° to 35° in the proximal direction. The drill bit is rotated at less than 75 rpms, preferably less than 50 rpms. At such a slow rotation speed, cooling fluid is not necessary and the drill bit does not heat up sufficiently to cause necrosis of adjacent tissues. The helix angulation of the proximal portion of the drill bit facilitates harvesting bone fragments, which can be reused in bone grafting.