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Retrograde resection apparatus and method

  • US 9,358,029 B2
  • Filed: 12/11/2007
  • Issued: 06/07/2016
  • Est. Priority Date: 12/11/2006
  • Status: Active Grant
First Claim
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1. A retrograde resection apparatus, comprising:

  • a shaft having a distal end, a proximal end, and a longitudinal axis extending therebetween, said distal end including at least one protrusion extending radially outward from said shaft; and

    a cutting blade having a disc shape and comprising a first surface, a second surface opposite to said first surface, and a central region including center of rotation, said cutting blade further comprising;

    a retrograde cutting feature projecting outwardly from said second surface, said retrograde cutting feature configured to remove bone when said cutting blade is rotated about said center of rotation of said cutting blade;

    an elongated radial slot having a depth extending through said first surface to said second surface, a radial length extending along said first surface and said second surface and through at least a portion of said central region towards a peripheral edge of said cutting blade, and a width extending between radial edges of said elongated slot, wherein said radial length is greater than said width; and

    at least one axial recess extending partially inward from said first surface towards said second surface of said cutting blade, the at least one axial recess open into a portion of said elongated radial slot in said central region;

    wherein said radial length of said elongated radial slot is greater than a cross-sectional width of said shaft and said at least one protrusion to allow said distal end of said shaft and said at least one protrusion to be advanced from said second surface of said cutting blade, through said elongated radial slot, to said first surface and into said central region of said cutting blade such that said at least one protrusion engages said at least one axial recess and said second surface and said retrograde cutting feature faces toward said proximal end of said shaft, wherein rotation and retrograde movement of said shaft causes said cutting blade to rotate about said center of rotation along said longitudinal axis of said shaft and remove bone when said at least one protrusion engages said at least one axial recess and wherein said cutting blade is tiltable with respect to said longitudinal axis of said shaft when said at least one protrusion engages said at least one axial recess as said shaft and said cutting blade rotate about said center of rotation along said longitudinal axis of said shaft.

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