Joint fusion instrumentation and methods

A device for excising a cavity within bony tissue, the device having a proximal end and a distal end opposite the proximal end, and extending along a longitudinal device axis between the proximal and distal ends, the device comprising:

• a handle assembly proximate the device proximal end and extending distally along the longitudinal device axis;
• an outer tube extending distally from the handle assembly, a distal end of the outer tube positioned proximate the device distal end;
• a blade assembly connected to the handle assembly and aligned with the longitudinal device axis, the blade assembly terminating proximal to the device distal end;
• the blade assembly comprising a blade body having a proximal end and a distal end and first and second opposing sides extending therebetween, the first side having a first curved cutting edge;
• and
• an actuation mechanism connected to the blade assembly, wherein the actuation mechanism controls movement of the blade body away from and toward the longitudinal axis;
• wherein upon actuation of the actuation mechanism, the blade body is projected away from the longitudinal device axis along a curved path proximal to the device distal end, and wherein the projection of the blade body can be ceased at any point on the curved path to establish a cutting radius of the device.

A device for excising a cavity within bony tissue, the device having a proximal end and a distal end opposite the proximal end, and extending along a longitudinal device axis between the proximal and distal ends, the device comprising:

• a handle assembly proximate the device proximal end and extending distally along the longitudinal device axis;
• an outer tube extending distally from the handle assembly, a distal end of the outer tube positioned proximate the device distal end;
• an actuation mechanism;
• and
• a blade assembly connected to the handle assembly and the actuation mechanism, and aligned with the longitudinal device axis, the blade assembly terminating proximal to the device distal end;
• the blade assembly comprising a blade body having a proximal end and a distal end and first and second opposing sides extending therebetween, the first side having a first curved cutting edge;
• wherein the blade assembly comprises a first configuration in which the blade body is contained within the outer tube;
• and wherein the blade assembly comprises a second configuration in which at least a portion of the blade body is projected away from the longitudinal device axis and out of the outer tube, and in which the blade body is in contact with a first stop surface so that independent movement of the blade body relative to the device is limited.