Microdebrider with stability interface bushing

A system for removing tissue or bone, comprising:

• a housing adapted to connect to a power source, a fluid source and a suction source, the housing including an adapter configured to operably connect to a selectively removable blade, the selectively removable blade having a blade angle of about 12° to about 90° and including:
• an outer tube extending therefrom including a longitudinal axis defined therealong, the outer tube including a distal end defining an inner lip on an inner periphery thereof;
• a middle tube operably supported concentrically within the outer tube, the middle tube including an opening having a series of teeth at a distal end thereof and a shoulder defined around an outer peripheral surface thereof;
• an inner tube concentrically disposed within the middle tube including an opening having a series of teeth at a distal end thereof in longitudinal registration with the opening in the middle tube, the inner tube adapted to couple to a power source such that, upon activation thereof, the inner tube rotates relative to the middle tube and the series of teeth of the inner tube cooperate with the series of teeth of middle tube to cut tissue or bone disposed in a cutting window defined in the openings defined therebetween;
• and
• a bushing disposed atop the middle tube in abutting relation against the shoulder, such that, upon assembly, the bushing seats in axial, abutting retention between the shoulder of the middle tube and the inner lip of the outer tube, the seating of the bushing in axial, abutting retention configured to maintain the stability of an interface between the outer tube and the middle tube when the cutting window between the openings is reoriented.