Patent ID: 8435259

Claim:
A surgical cutting accessory configured for being attached to and driven by a powered surgical handpiece, said accessory comprising: a cutting element assembly including a hub defining a proximal end of said cutting element assembly and configured for cooperation with a drive member of a powered surgical handpiece, and an elongate drive shaft having a proximal end connected to said hub and a distal end defining a first cutting window therein, said first cutting window having a pair of spaced-apart first and second cutting edges; and an outer housing assembly including a hub defining a proximal end of said outer housing assembly and configured for cooperation with a coupling arrangement provided on a powered surgical handpiece, an elongate and generally tubular housing element in which said drive shaft is disposed for movement relative to said housing element, said housing element having a proximal end connected to said housing assembly hub and a distal end defining a second cutting window therein disposed adjacent said first cutting window of said drive shaft, said second cutting window having a pair of spaced-apart first and second cutting edges, wherein one of said first cutting edge and said second cutting edge of one of said first and second cutting windows has a cutting profile different from the other said cutting edge of said one cutting window; wherein said cutting profile of said one cutting edge of said one cutting window is toothed and said cutting profile of said other cutting edge of said one cutting window is generally straight.