generating an initial-computer model of the patient's bone structure;

extrapolating a surface of a bone in the defective mid-face region wherein the surface defines a void in the defective mid-face region, and wherein the extrapolating the surface step includes identifying a plurality of landmark locations around a periphery, of the surface, defining the void in the defective mid-face region to determine a contour of the surface; and

generating the patient-specific bone graft cage computer model based on the initial-computer model and the extrapolation of the surface of the bone, wherein the patient-specific bone graft cage computer model is configured to match the extrapolation of the surface, wherein the patient-specific bone graft cage computer model is weakened by including a plurality of apertures that are configured to receive bone graft material such that each of the plurality of apertures includes an open end and terminates at a closed end opposite the open end, and wherein the open end is configured to receive the bone graft material, and the a closed end is defined by a base that is configured to support the bone graft material.