An intramedullary fixation assembly for repairing a human long bone, the long bone being a human radius, the long bone defining a medullary canal fractured into at least a first and second adjacent bone fragments (16, 17), the first bone fragment having a free end with an articular surface thereon and defining a side aperture, said side aperture positioned subjacent the articular surface and extending into the medullary canal, said intramedullary fixation assembly comprising: at least a first and second fasteners, each of said fasteners having an elongate body (43, 45) with a head end and an opposite, bone-securing end; and a fixation member having a first end, a second end and a body extending between the first and second ends (22, 23), wherein the body continuously curves from its first end to its second end and includes smoothly curving concave and convex sides configured to facilitate passage of the fixation member through the side aperture and into the medullary canal, the concave and convex sides (30, 29) tapering toward each other at the second end, the body including opposing planar side surfaces between the concave side and the convex side, the planar side surfaces tapering toward each other as they extend from the first end to the second end of the curved body, the first end of the body including an exposed end surface that is flat and is accessible through the side aperture, and an adjacent first end surface that is flat and is distal to the exposed first end surface, the exposed end surface and the adjacent first end surface intersecting each other, the adjacent first end surface being at a right angle to the exposed end surface, said body defining a side aperture accessible fastener opening passing through the exposed end surface, and a pair of fastener openings, the side aperture accessible fastener opening extending from the exposed end surface to the convex side, and being relatively orthogonal to the exposed first end surface and the convex side, the pair of fastener openings extending between the curved convex side and the concave side, said side aperture accessible fastener opening and said pair of fastener openings being positioned proximate the first end and each configured to allow passage of a first fastener therethrough and into the first bone fragment, the first end of the body including at least a pair of opposing, converging surfaces that are configured to engage in an interference fit with an exposed end of the fixation member accessible through the side aperture in the first bone fragment, said body defining a second fastener opening positioned proximate the second end and configured to allow passage of the second fastener therethrough and into the second bone fragment, the second fastener opening extending between the planar side surfaces, and said body having a radius of curvature at least near the first end within a range of 3.8 to 12.7 centimeters to allow passage of the fixation member through the side aperture of the first bone fragment and into the medullary canal until the exposed end surface is positioned adjacent the side aperture, the first end of the fixation member is positioned within a portion of the medullary canal defined within the first bone fragment, and the second end of the fixation member is positioned within a portion of the medullary canal defined within the second bone fragment. at least a first and second fasteners, each of said fasteners having an elongate body (43, 45) with a head end and an opposite, bone-securing end; and a fixation member having a first end, a second end and a body extending between the first and second ends (22, 23), wherein the body continuously curves from its first end to its second end and includes smoothly curving concave and convex sides configured to facilitate passage of the fixation member through the side aperture and into the medullary canal, the concave and convex sides (30, 29) tapering toward each other at the second end,