Surgical milling cutter for bone or tissue

摘要

The cutter has a chip breaker groove (42) surrounding the cutting head (12) and dividing the blades (40) into individual axial teeth (50) that remove bone or bony tissue. The groove is at least as wide as the teeth (50), possibly twice as wide. The groove is however shallower than the teeth and may surround the head in a spiral shape, with the blades at an angle to the longitudinal axis of the head. The head is held at the distal end of the shaft sleeve as used to withdraw the tissue etc removed. The head is enclosed in a bearing sleeve and is driven by a motor. Additional detail includes the sidewalls (44,46) of the breaker groove. In operation, with the head under power, the teeth engage the bone or tissue which thus collects in the breaker groove spiral for removal through the sleeve specified for final recovery through suction openings at this end.