Rotary Surgical Cutting System And Related Accessories

A high-speed surgical bur assembly configured to cut tissue and to be coupled to a surgical assembly, the high-speed surgical bur assembly comprising:

• a nose tube defining a lumen extending between proximal and distal ends of the nose tube, the nose tube having a proximal portion configured to be coupled to the surgical assembly, and the proximal portion of the nose tube comprising a projection configured to constrain a radial orientation of the nose tube relative to the surgical assembly to prevent relative rotation between the nose tube and the surgical assembly;
• a driveshaft at least partially disposed within the lumen of the nose tube and configured to rotate relative to the nose tube, the driveshaft having a proximal region extending along an axis, the proximal region of the driveshaft comprising:
• a drive portion for engaging a rotatable drive chuck of the surgical assembly in a driving orientation, and
• an alignment portion proximal the drive portion of the driveshaft, the alignment portion having an outer surface tapering toward the axis as the alignment portion extends from the drive portion to a proximal end of the driveshaft, and the alignment portion configured to engage the rotatable drive chuck to align the drive portion to the driving orientation for the drive portion of the driveshaft to engage the rotatable drive chuck, and the alignment portion defining a notch extending distally from the proximal end of the driveshaft such that the notch is formed at the proximal end of the driveshaft for mitigating contact between the alignment portion of the driveshaft and the rotatable drive chuck during engagement of the alignment portion with the rotatable drive chuck;
• and
• a cutting tool coupled to a distal region of the driveshaft opposite the proximal region of the driveshaft, the cutting tool configured to rotate with the driveshaft relative to the nose tube in response to rotation of the rotatable drive chuck of the surgical assembly.