Tri-taper hip stem
AssigneeGlobus Medical, Inc.
InventorsJohn Loiacono, David Stumpo, Carly McGonagle
Life of this patent
Estimating the term…
Abstract
Provided are hip stems for hip arthroplasty, kits of implant systems, and methods of using said hip stems and kits. The hip stems comprise a stem body having a length formed by a proximal portion, a middle portion, and a distal portion, and a stem neck extending from the proximal portion of the stem body and terminating at a free end. The stem portion comprises a first taper along a length of the middle portion of the stem body causing a width of the stem body to decrease, a second taper along the length of the stem body causing a width of the stem body in the posterior-anterior direction to decrease, and a third taper along a base of the stem neck causing a width of the base in the posterior-anterior direction to increase.
Claims19
A hip stem for a hip arthroplasty, the hip stem comprising:
- a stem body having a length formed by a proximal portion, a middle portion, and a distal portion;
- and
- a stem neck extending from the proximal portion of the stem body and terminating at a free end,
- wherein the stem body comprises a first taper along a length of the stem body as measured in the cranial-caudal direction causing a width of the stem body in the medial-lateral direction to decrease as the first taper extends along the middle portion of the stem body, a second taper along the length of the stem body as measured in the cranial-caudal direction causing a width of the stem body in the posterior-anterior direction to decrease as the second taper extends along the middle portion of the stem body, and a third taper along a base of the stem neck causing a width of the base in the posterior-anterior direction to increase as the third taper extends along the base from the free end of the stem neck towards the stem body.
A kit for performing a hip arthroplasty, the kit comprising:
- a broaching system for preparing a femur for a total hip arthroplasty;
- a cementless hip stem;
- and
- a cemented hip stem, wherein both the cementless hip stem and the cemented hip stem comprise:
- a stem body having a length formed by a proximal portion, a middle portion, and a distal portion;
- and
- a stem neck extending from the proximal portion of the stem body and terminating at a free end,
- wherein the stem portion comprises a first taper along the length of the stem body causing a width of the stem body in the medial-lateral direction to decrease as the first taper extends along the middle portion of the stem body from a proximal end of the middle portion to a distal end of the middle portion, a second taper along the length of the stem body causing a width of the stem body in the posterior-anterior direction to decrease as the second taper extends along the middle portion of the stem body from the proximal end of the middle portion to the distal end of the middle portion, and a third taper along a base of the stem neck causing a width of the base in the posterior-anterior direction to increase as the third taper extends along the base from a proximal end of the stem neck towards the stem body, and wherein the broaching system can be used for both the cemented hip stem and the cementless hip stem.
Dependencies are inferred from the claim text.