Abstract An improved femoral component for use in a total hip replacement prosthesis comprises a stem portion and a combined head and neck portion. The stem portion includes a proximal portion and a distal portion which are angularly related with respect to one another and with the proximal portion including a recess formed therein for receipt of the tapered portion of the head and neck component. The head and neck component includes a substantially part spherical head portion attached to a neck portion and a tapered portion angularly attached to the neck portion via a basalar neck portion with the tapered portion being adapted to be permanently inserted into the recess portion of the proximal end of the above described stem portion. The stem portion includes a plurality of recesses on the periphery and longitudinal extent thereof which recesses receive fiber metal pads which are provided to allow bony ingrowth therein to retain the femoral component permanently installed in the proximal end of the femur.
In an improved femoral component including a stem component and a head and neck component connectable to said stem component to form said femoral component, said head and neck component comprising: (a) a head portion; (b) a neck member at a first end thereof protruding from a substantially flat face of said head portion; (c) said neck member, at a second end thereof being connected to a first surface of a basalar neck portion; (d) said basalar neck portion having a second surface from which protrudes a tapered portion, a third substantially rectangular surface substantially perpendicular to said second surface, and fourth and fifth surfaces substantially perpendicular to both said second surface and said third surface; and (e) said neck member and said tapered portion forming an obtuse angle with one another and said first and second surfaces converging to form an acute angle therebetween.
Claim 2
Dependent Claim
145 words
In an improved femoral component including a stem component and a head and neck component connectable to said stem component to form said femoral component, said head and neck component comprising: (a) a head portion; (b) a neck member at a first end thereof protruding from a substantially flat face of said head portion; (c) said neck member, at a second end thereof being connected to a first surface of a basalar neck portion; (d) said basalar neck portion having a second surface from which protrudes a tapered portion, a third substantially rectangular surface substantially perpendicular to said second surface, and fourth and fifth surfaces substantially perpendicular to both said second surface and said third surface; and (e) said neck member and said tapered portion forming an obtuse angle with one another and said first and second surfaces converging to form an acute angle therebetween.