Patent ID: 7060102

Claim:
A prosthetic femoral implant suitable for use in hip arthroplasty, said implant comprising: a. a longitudinal stem having a distal end and a proximal end, said stem further having a longitudinal axis extending from said proximal end to said distal end; b. a neck portion extending from said proximal end of said stem and having a femoral head configure for engagement within an acetabulum; c. said neck portion having an axis extending through said femoral head and neck portion to intersect said stem axis, and wherein a transverse cross section of said neck portion taken perpendicular to said neck axis further comprises (i) a medial/lateral axis bisecting said cross section through a medial-most point along said medial edge and a point along said lateral edge of said cross section, thereby creating two anterior and posterior halves about said medial/lateral axis, said medial/lateral axis further defining a maximum medial/lateral width of said cross-section; and (ii) a maximum anterior/posterior axis intersecting said anterior and posterior edges and said medial/lateral axis to define a maximum anterior/posterior width of said cross section; d. said transverse cross section further having a configuration defined by a medially-positioned circle comprising (i) said medial-most point of said cross section, (ii) a point taken on said anterior edge of said cross section, and (iii) a point taken on said posterior edge of said cross section, wherein each of said anterior and posterior edge points are located along said anterior and posterior edges, respectively, at a distance of 10% of said maximum medial/lateral width measured laterally from said medial-most edge point; and e. said medially-positioned circle having a medial diameter ranging in length of about 66% or less of said maximum anterior/posterior width of said cross section.