Mechanically fixed acetabular unit for prostheses and implantation device for fixing it into the cotyloid cavity

Claim 1

A mechanically fixable acetabular unit for prostheses comprising: (a) an acetabular basket made of biocompatible material having an open face, a curved base and walls defining an interior space; (b) cutouts defined by said walls of said acetabular basket; (c) L-shaped anchors, having a longer and a shorter shank, positioned within said cutouts in such a manner that said shorter shank is at the portion of the cutout nearest said curved base and said shorter shank is formed as a sharp pointed claw, whereby said L-shaped anchors pivot, said pointed claw on each anchor thus engaging a bone; (d) a threaded bore defined by said curved base of said acetabular basket; and (e) an acetabular basket insert comprising: (i) insert side walls having the same shape as the walls of said acetabular basket defining said interior space; (ii) an insert base having the same shape of the curved base of said acetabular basket defining said interior space; (iii) a threaded pin, dimensioned, configured and proportioned to matingly engage said threaded bore defined by said curved base, said threaded pin located on said insert base; and (iv) a cavity having a hemispherical surface, said inset maintaining said anchors in a pivoted, bone engaging position when said insert is placed in said acetabular basket.