The present invention relates to an apparatus and method to obtain bone fixation. More particularly, one embodiment of the present invention relates to a mechanism for achieving bone "through-growth" in a variety of orthopaedic applications. In one example (which example is intended to be illustrative and not restrictive), a prosthesis designed to achieve bone "through-growth" via one or more "windows" in a peg or keel structure may be provided (bone graft may be inserted into the peg or keel structure). In one specific example (which example is intended to be illustrative and not restrictive), a glenoid prosthesis (and associated method) may be used to resurface the scapula. In another specific example, the present invention may be used in the context of a partial or total shoulder arthroplasty.