Hip implant
AssigneeXerxes Arthropedix, LLC
InventorHenry Kurtis Biggs
Life of this patent
Estimating the term…
Abstract
A hip implant for use in hip replacement surgical procedures. The hip implant comprises a femoral stem body designed for fixation in two planes, i.e. the AP plane and the lateral plane. The curvature of the implant is designed to mirror the geometry of the femur, thus providing for more contact points with the inner surface of the medullary cavity. The outer surface curvature cooperates with the inner surface associated with the medullary cavity. The hip implant is designed to provide increased or maximum contact with the interior of the bone, i.e. femur, while decreasing or minimizing stress risers or stress points, thus reducing the likelihood of patient pain and/or implant failure.
Claims21
A hip implant for use in hip replacement surgical procedures comprising:
- a femoral stem body designed for fixation to a femur bone in an anteroposterior (AP) plane and a lateral plane, the femoral stem body extending from a proximal end to a distal tip along a three-dimensional curvature that results from an intersection of a first two-dimensional curvature that follows a first centerline that extends toward the distal tip while remaining equidistant from opposed outer surfaces of the femoral stem body within an anterior-posterior plane, and a second two-dimensional curvature that follows a second centerline that extends toward the distal tip while remaining equidistant from opposed outer surfaces of the femoral stem body within a lateral plane that is orthogonal to said anterior-posterior plane, the femoral stem body including an outer surface having a curvature that corresponds to the three-dimensional curvature,
- wherein said first two-dimensional curvature, said second two-dimensional curvature, or both said first two-dimensional curvature and said second two-dimensional curvature include an inflection point at which the respective curvature changes from concave to convex, and said inflection point is closer to said distal tip than said inflection point is from said proximal end.
An implant device for use in surgical procedures, said implant device comprising:
- a femoral stem body designed for fixation in an anterior-posterior plane and a lateral plane that is orthogonal to said anterior-posterior plane, said femoral stem body extending along a longitudinal axis through a proximal end, a distal tip, and a main body that is between said proximal end and said distal tip with respect to said longitudinal axis, the femoral stem body including an outer surface having a curvature that follows the longitudinal axis;
- and
- a neck portion extending from said proximal end,
- wherein said longitudinal axis follows a three-dimensional curvature formed by an intersection of a two-dimensional curvature that extends toward the distal tip while remaining equidistant from opposed outer surfaces of the main body within said anterior-posterior plane and a two-dimensional curvature that extends toward the distal tip while remaining equidistant from opposed outer surfaces of the main body within said lateral plane, and said two-dimensional curvature formed in said lateral plane includes an inflection point at which the respective curvature changes from concave to convex, and the inflection point is positioned closer to said distal tip than said inflection point is from said neck portion.
Dependencies are inferred from the claim text.