Patent ID: 8518043

Claim:
A disposable low cost acetabular spherical hollow reamer assembly for medical applications, comprising: a. a disposable spherical hollow reamer and a reusable shaft; b. said reusable shaft having an elongated body with a proximal end and a distal end, said proximal end having a coupling portion appointed for attachment of said spherical hollow reamer assembly to a drilling device, said distal end having a male precision threaded portion for attachment to said disposable spherical hollow reamer; c. a disposable spherical hollow reamer, comprising: 1. a disposable spherical hollow reamer dome having a hollow construction with an outer surface, an interior surface and a bone debris capturing cavity, said outer surface further comprising a plurality of cutting teeth and a plurality of apertures; 2. said disposable spherical hollow reamer dome having an internal welded first plate with female precision threaded aperture centrally located within said bone debris capturing cavity of said spherical hollow reamer dome adapted to receive said male precision threaded portion of the distal end of the reusable shaft; 3. said disposable spherical hollow reamer dome having an external welded second plate at the proximal end with a centrally located precision diameter aperture adapted to slide over the outer diameter of the reusable shaft with a sliding fit tolerance; whereby a screwed attachment of said disposable spherical hollow reamer welded first plate to the reusable shaft distal end aligns their centerlines at a first attachment location and the sliding fit of the aperture in the welded second plate over the outer diameter surface of the reusable shaft provides a second attachment location that is displaced from the first attachment location, preventing wobbliness during reaming and creating precise bone cavities that replicate the shape of the disposable spherical hollow reamer in a medical procedure, and the second welded plate of the spherical hollow reamer in combination with the spherical hollow reamer interior surface forms a containment volume for capturing bone fragment or bone cement fragment.