| CPC A61F 2/3609 (2013.01) [A61F 2/30771 (2013.01); A61F 2002/30331 (2013.01); A61F 2002/3069 (2013.01); A61F 2002/3092 (2013.01); A61F 2002/3093 (2013.01); A61F 2002/3613 (2013.01); A61F 2002/3623 (2013.01)] | 34 Claims |
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1. A hip cone adapted to be installed in a femur for primary, conversion, or revision total hip arthroplasty, the hip cone comprising:
a body having an overall outside shape and comprising opposing first and second ends, the body defining an internal region through which a femoral stem is adapted to extend, the internal region having a region shape;
a first opening formed in the first end of the body and through which the femoral stem is adapted to extend, the first opening having a first shape;
and
a second opening formed in the second end of the body and through which the femoral stem is adapted to extend, the second opening having a second shape;
wherein the second shape of the second opening is different from the first shape of the first opening;
wherein the region shape of the interior region of the body corresponds to the overall outside shape of the body:
wherein the body defines one or more external surfaces, the one or more external surfaces defining an external shape in a cross-sectional plane that is: positioned between the first and second ends; and perpendicular to a direction in which the femoral stem is adapted to extend through the internal region;
wherein the external shape of the body in the cross-sectional plane is configured to be the same as an internal shape defined by internal seating surface(s) of the femur so that, when the hip cone is installed in the femur, the external shape of the body is coplanar with, and installed against, the internal shape defined by the internal seating surface(s) of the femur;
wherein the first shape of the first opening is a slot shape;
wherein the second shape of the second opening of the hip cone is a circular shape, an ovoid shape, an oblong shape, or an irregular shape;
wherein the hip cone is configured to promote biologic fixation so that, after the hip cone is installed in the femur, biologic fixation between the femur and the hip cone is permitted;
wherein the configuration of the hip cone to promote biologic fixation comprises:
a porous coating on at least a portion of the hip cone; and/or
at least a portion of the hip cone formed out of a porous material;
wherein the body of the hip cone comprises a main portion and a spout portion adjoined thereto;
wherein the main portion and the spout portion of the body together define the internal region through which the femoral stem is adapted to extend;
wherein the main portion of the body comprises:
a first main end portion;
a second main end portion opposite the first main end portion and comprising an end that is the same as the second end of the body of the hip cone and thus the second opening, which has the circular shape, the ovoid shape, the oblong shape, or the irregular shape, is formed in the end of the second main end portion of the main portion of the body of the hip cone; and
an intermediate sleeve portion extending between the first main end portion and the second main end portion;
wherein the main portion of the body defines a first portion of the internal region through which the femoral stem is adapted to extend;
wherein the spout portion of the body comprises:
a first spout end portion;
a second spout end portion; and
an angled portion extending between the first spout end portion and the second spout end portion;
wherein the spout portion of the body defines a second portion of the internal region through which the femoral stem is adapted to extend;
wherein the main portion and the spout portion are contiguous so that together they define the overall outside shape of the body;
wherein the first and second portions of the internal region, which are defined by the main and spout portions of the body, respectively, are contiguous so that together they define the region shape of the interior region of the body, which region shape corresponds to the overall outside shape of the body;
wherein the first main end portion and the first spout end portion are contiguous so that together they form the first end of the body of the hip cone and thus the first opening, which has the slot shape, is formed in the contiguous first main end portion and first spout end portion;
wherein the second spout end portion terminates at the main portion of the body so that the second spout end portion is spaced from the end of the second main end portion in a direction in which the femoral stem is adapted to extend through the second opening of the body of the hip cone, and thus a spacing is defined between:
the termination of the second spout end portion at the main portion of the body, and
the second end of the body of the hip cone,
in the direction in which the femoral stem is adapted to extend through the second opening of the body of the hip cone;
wherein the angled portion of the spout portion of the body is angled with respect to the main portion of the body so that respective portions of the angled portion and the main portion define an obtuse angle of the body of the hip cone; and
wherein the obtuse angle of the body of the hip cone, which is defined by the respective portions of the angled portion and the main portion, is adapted to accommodate:
an obtuse angle of the femur defined by respective portions of the internal seating surface(s) of the femur so that, when the hip cone is installed in the femur, the body is installed against the respective portions of the internal seating surface(s) of the femur that define the obtuse angle of the femur; and
an obtuse angle defined by the femoral stem so that the femoral stem is permitted to extend through: the first opening formed in the first end of the body of the hip cone; the internal region defined by the body of the hip cone; and the second opening formed in the second end of the body of the hip cone, which second end of the body of the hip cone is the same as the end of the second main end portion.
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