The present disclosure provides an artificial alpha femoral stem prosthesis which includes a femoral stem cone, a femoral neck and a stem body connected integratedly, wherein a tool operating hole is arranged at upper end of the the femoral neck; the stem body comprises a proximal segment of the femoral stem, a middle segment of the femoral stem and a distal segment of the femoral stem, and there is a deflection angle between the femoral neck and the stem body.

The present disclosure provides a cobra type femoral stem prosthesis, that is a femoral stem prosthesis for congenital dysplasia of the hip (CDH) which includes a femoral stem cone, a femoral neck and a stem body which are connected sequentially; the stem body includes proximal segment of femoral stem, middle segment of femoral stem and distal segment of femoral stem, wherein the femoral stem cone is a cone shape; One end of the femoral neck is connected with the proximal segment of femoral stem and there is a deflection angle therebetween and the other end of the femoral neck is connected with the large diameter end of the femoral stem cone.

An implant for a hip can include a lateral augment adapted to be coupled to a lateral side of a femoral body implant. The lateral augment can include a body portion having a first surface, a second surface opposite the first surface, and a protrusion extending from the second surface. The protrusion can have a shape adapted to mate with a complementary shaped recess formed in the lateral side of the femoral body implant. An aperture can be positioned in the body portion and extend through the protrusion. A fastener can be received through the aperture and adapted to be threadably secured to the lateral bore. The fastener can be configured to have a length sufficient to pass through a portion of a greater trochanter for securing the portion of the greater trochanter and the lateral augment to the femoral body implant.

A bone plate includes first and second ends opposed along a longitudinal axis oriented along a longitudinal direction, first and second sides opposed along a lateral direction, and a bone-facing surface and an outer surface opposed along a transverse direction. The plate defines a first hole and a second hole arrangement extending from the outer to the bone-facing surface. The second hole arrangement is distal of the first hole, which is configured to receive a first fixation member, and the second hole arrangement is configured to receive at least one second fixation member for affixing with underlying bone. The plate is pivotable along an angulation range about the first hole. The second hole arrangement laterally crosses the longitudinal axis, defines the angulation range, and allows the at least one second fixation member to substantially secure the plate to the underlying bone at any angulation within the angulation range.

A short-stem femoral implant suitable for use in hip arthroplasty configured to self-stabilise against sliding across the endo-cortex when implanted in a subject's femur. The femoral implant includes a distal end configured to engage in abutment with the lateral endo-cortex of the subject's femur at two distal locations such that when implanted, the femoral implant has a reduced tendency for sliding across the endo-cortex.

A modular implant system can include a first component and a second component. The first component can include a stem adapted to be anchored within a medullary canal of a bone and a mounting boss defining an outer coupling surface and an inner coupling surface. The second component can include a collar defining a first coupling surface adapted to engage the outer coupling surface of the mounting boss to secure the second component to the first component.

Hip implant systems described herein can include a distal stem, a proximal body, and a fastener. In some embodiments, the distal stem can include a cavity configured to receive the fastener when a portion of the distal stem is positioned within the proximal body. In some embodiments, the distal stem can include a threaded exterior surface configured to mate with a fastener when a portion of the distal stem is positioned within the proximal body. In some embodiments, a distal end of the distal stem can include an anterior relief configured to conform to interior surface of a femoral canal of a patient.

A medical device for implantation in a hip joint of a human patient, the natural hip joint having a ball shaped caput femur as the proximal part of the femoral bone with a convex hip joint surface towards the center of the hip joint and a bowl shaped acetabulum as part of the pelvic bone with a concave hip joint surface towards the center of the hip joint. The medical device comprising; an artificial caput femur, comprising a convex surface towards the center of the hip joint. The artificial convex caput femur is adapted to, when implanted: be fixated to the pelvic bone of the human patient, and be in movable connection with an artificial acetabulum surface fixated to the femoral bone of the patient, thereby forming a ball and socket joint. The medical device further comprises a fixation element comprising a fixation surface adapted to be in contact with the surface of the acetabulum and adapted to fixate the artificial convex caput femur to at least the acetabulum of the pelvic bone.

A blade-like stem of a hip joint prosthesis for anchoring in the femur, including a prosthesis neck portion and a femur-anchoring portion extending therefrom and having a proximal end and a distal end, the femur-anchoring portion including a proximal arcuate portion extending from a location adjacent the proximal end and having a radius of curvature that changes in a distal-to-proximal direction, and the femur-anchoring portion further including a distal tapered portion extending from the proximal arcuate portion toward the distal end.

Hip implant systems described herein can include a distal stem, a proximal body, and a fastener. In some embodiments, the distal stem can include a cavity configured to receive the fastener when a portion of the distal stem is positioned within the proximal body. In some embodiments, the distal stem can include a threaded exterior surface configured to mate with a fastener when a portion of the distal stem is positioned within the proximal body. In some embodiments, a distal end of the distal stem can include an anterior relief configured to conform to interior surface of a femoral canal of a patient.