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US 5,314,493 AGranted
Femoral hip joint prosthesis
OwnerW. E. Michael Mikhailinventor
Life of this patent
Estimating the term…
Abstract
A femoral hip joint prosthesis includes a metal component having a double tapered stem and a preapplied cement mantle with an integral centralizer.
Claims12
A femoral hip joint prosthesis for insertion into a prepared intramedullary canal comprising:
- (a) a structural member formed of metal and having an elongated stem extending from a proximal end to a distal end, said stem tapering from larger to progressively smaller cross-sectional sizes from said proximal end to said distal end, said stem having surfaces with a polished finish;
- and
- (b) a preapplied cement mantle on said surfaces, in direct engagement with said surfaces forming a non-bonded interfacial relationship therewith which permits subsidence of said stem within said preapplied cement mantle, said cement mantle extending beyond the end of said distal end and including an integral centralizer, said centralizer including outwardly extending means engageable with said prepared intramedullary canal and having a closed end defining a pocket, said centralizer closed end being spaced distally from said stem distal end.
A femoral hip joint prosthesis for insertion into a prepared intramedullary canal comprising:
- (a) a structural member formed of a cobalt chrome molybdenum alloy and having an elongated stem extending from a proximal end to a distal end, said stem tapering from larger to progressively smaller cross-sectional sizes from said proximal end to said distal end, said stem having surfaces with a polished finish;
- and
- (b) a preapplied cement mantle on said surfaces, in direct engagement with said surfaces forming a non-bonded interfacial relationship therewith which permits subsidence of said stem within said preapplied cement mantle, said cement mantle extending beyond the end of said distal end and including an integral centralizer, said centralizer including means engageable with said prepared intramedullary canal and having a closed end defining a pocket, said centralizer closed end being spaced from said stem distal end.
Dependencies are inferred from the claim text.