Patent ID: 9681881
Date: 2017-06-20
CPC Classifications: A61B,A61L,B22F,B28B,B32B,C04B

Claim:
1. A method for producing an acetabular reamer of the type having a hemispherical cup containing a plurality of cutter-hole combinations and an integral back plate for connection to a quick-release coupling mechanism, comprising the steps of: 1.1 selecting an outer diameter (OD) for the intended acetabular reamer, 1.2 selecting a hole diameter, also called base diameter (S), and cutter height (H) for the cutter-hole combinations of said acetabular reamer, 1.3 determining an angle of incidence (α) of said cutters with the hemispherical surface of said acetabular reamer using the mathematical relation:  where H, S and OD are as defined above, 1.4 fabricating a first injection molding tool for producing an acetabular reamer cup, comprising: 1.5 fabricating a second injection molding tool for producing a suitable back plate for connecting said acetabular reamer to a reamer driver, 1.6 providing at least one sinterable material in particulate form, 1.7 mixing said sinterable particulate material or materials with an organic binder to produce an injection molding feedstock, 1.8 molding said feedstock into green reamer cups in the first molding tool and green back plates in the second molding tool, 1.9 superposing said green reamer cups onto said green back plates to form green reamer assemblies, 1.10 extracting substantially all organic matter from said green assemblies, 1.11 sintering said binder-free assemblies to substantially full density.