Patent ID: 8449545

Claim:
A modular tapered hollow reamer for medical applications, comprising: a. a shaft portion having an elongated body with a proximal end, a central portion, and a distal end, said proximal end having a coupling portion appointed for attachment of said reamer to a drilling device, said central portion having two or more torque transmitting tabs integrally attached thereto, and said distal end having a male threaded portion; b. a disposable tapered hollow reamer portion, comprising: 1. a tapered hollow reamer sleeve having a plurality of externally protruding cutters, a plurality of apertures extending through a thickness of the sleeve and inwardly protruding anchoring projections; 2. a central molded polymeric portion contacting said reamer sleeve at cutting teeth anchoring locations; 3. said central molded polymeric portion having molded channels directly below apertures forming a space for collection of bone fragments or bone cement debris; 4. said central molded polymeric portion having a central aperture for receiving said shaft and having two or more slots extending from said central aperture to receive said torque transmitting tabs; c. two end plates one at each end of the proximal and distal ends containing said disposable tapered hollow reamer at each end to contain bone fragment or bone debris within a collection space; d. a modular pilot with a central aperture having female threading; e. said disposable tapered hollow reamer being adapted to slide over said distal end of said shaft portion causing said torque transmitting tabs of said shaft to engage with slots of said tapered hollow reamer sleeve; f. said shaft portion being adapted to span the length of said disposable tapered Hollow reamer's interior; g. said modular pilot being inserted at the distal end of said shaft portion engaging said male threaded portion, thereby attaching to said disposable tapered hollow reamer portion; and h. said distal end of said shaft portion being closed; whereby, during drilling, torque from the shaft portion is transferred to said disposable tapered hollow reamer portion with substantial coincidence of centerlines, preventing reamer wobbliness, and bone and bone cement debris are collected in the space within the central molded polymeric portion.