Provided herein are hip implant devices and related surgical methods. The hip implants and methods can optionally be used in patients of Asian descent.

Provided herein is a femoral component of a hip implant device, comprising a neck having a central axis; and a body distal to the neck and having a tapered portion, wherein the body has a largest cross section perpendicular to the neck central axis, the largest cross section perpendicular to the neck central axis having a maximum height dimension and a maximum width dimension, wherein the maximum width dimension is 18.5 mm or less. The hip implant can optionally be used in patients of Asian descent.

An improved hybrid femoral component design for a hip prosthesis has a cross section having a rectangular or other shape lateral end and a circular or elliptical medial end, where the medial anterior-posterior (AP) dimension of the implant is greater than the lateral AP dimension of the implant. The cross sectional axis of the circular or elliptical medial end may be inclined or partially offset in relation to the axis of the rectangular lateral end. The lateral side of the proximal stem may have a plurality of shapes. This hybrid proximal stem design lends itself to a hybrid proximal femoral preparation surgical technique where the medial calcar may be power reamed and the lateral femur and canal may be broached.

A femoral prosthetic component has a stem and a neck. The neck defines a centre of rotation when engaging a head articulating within an acetabular cup in use. The component has anterior offset so that the centre of rotation is anteriorly offset with respect to a longitudinal axis of the stem. A proximal portion of the neck has posterior angulation. This three-dimensional geometry, including in the longitudinal plane, increases range of motion and mitigates against impingement.

An intramedullary stem includes an elongate body having a length extending from a first end to a second end and a lumen along at least a portion of the length. A first slit extends along the elongate body. The first slit is in between the first and second ends of the elongate body. A fin is attached to the elongate body at the first slit end and extends to a free end remote from the first slit end. The fin is biased in a first position where the free end is external to an outer surface of the elongate body and is movable based on radially inward forces to push the free end toward the elongate body. A second slit extends from the first end of the elongate body to an internal end along the elongate body. Also provided is a method of implanting an intramedullary stem into a bone.