Abstract: A bone measurement device is used to measure the adequacy of the distance between a cavity in the head and neck of a femur and the outer surface of the neck of the proximal femur. A coupling element is fixedly attached to an outer surface of a femoral head. An arm extends from the coupling element and a bone measurement device having an adjustable bone contacting element thereon is coupled to the arm. An adjustable coupler is provided for moving the bone measurement device in a generally proximal-distal direction. The bone contacting element is mounted on the adjustable coupler for movement in a direction transverse to the proximal-distal direction into contact with bone when the coupling element is attached to the femoral head. The adjustable coupler for moving the bone measurement device in a proximal-distal direction and the adjustable bone contacting element are calibrated with distance markings. The markings correspond to sizes of femoral implants for implantation in the cavity.

Abstract: An apparatus for preparing a head portion of a proximal femur has a drill guide support having a cylindrical bore therein for engaging the head of a femur. The support has a central axis for coaxial alignment with a central axis of a neck of a proximal femur. A drill guide is mounted on a proximal end of the drill guide support, the drill guide having a first drill guide portion extending along an axis co-axial with the central axis of the base portion and a second drill portion extending along an axis forming an acute angle with the first drill portion central axis. A bone thickness indicator is mounted on the drill guide and is moveable towards and away from a neck of the femur along an axis forming an angle with the central axis of the drill guide support.