An article for use in the surgical fusion of the human cranio-cervical junction, comprising: a plate member comprising: an outer plate surface and an inner plate surface that is constructed and arranged to be secured to a human cranium, and a curved flange defined in said plate member, wherein the flange arises from a portion of said plate member and forms a graft accommodation space within said plate member between an inner flange surface and the cranium when the plate member has been secured to the cranium, said graft accommodation space being defined in part by an outer flange edge that is elevated with respect to a portion of said inner plate surface that is contacting the cranium so that said graft accommodation space is open to a space outside of said graft accommodation space, wherein said flange is configured to enclose and entrap a bone material based member (12, 14) within the graft accommodation space in close union with the cranium so as to apply pressure to the bone material based member to facilitate morphogenesis, whereby the bone material based member (12, 14) may be positioned within said graft accommodation space so as to be fused to the cranium and to extend away from said plate member; wherein said plate member is configured so as to define two of said graft accommodation spaces. a plate member comprising: an outer plate surface and an inner plate surface that is constructed and arranged to be secured to a human cranium, and a curved flange defined in said plate member, wherein the flange arises from a portion of said plate member and forms a graft accommodation space within said plate member between an inner flange surface and the cranium when the plate member has been secured to the cranium, said graft accommodation space being defined in part by an outer flange edge that is elevated with respect to a portion of said inner plate surface that is contacting the cranium so that said graft accommodation space is open to a space outside of said graft accommodation space, wherein said flange is configured to enclose and entrap a bone material based member (12, 14) within the graft accommodation space in close union with the cranium so as to apply pressure to the bone material based member to facilitate morphogenesis, whereby the bone material based member (12, 14) may be positioned within said graft accommodation space so as to be fused to the cranium and to extend away from said plate member; wherein said plate member is configured so as to define two of said graft accommodation spaces. an outer plate surface and an inner plate surface that is constructed and arranged to be secured to a human cranium, and a curved flange defined in said plate member, wherein the flange arises from a portion of said plate member and forms a graft accommodation space within said plate member between an inner flange surface and the cranium when the plate member has been secured to the cranium, said graft accommodation space being defined in part by an outer flange edge that is elevated with respect to a portion of said inner plate surface that is contacting the cranium so that said graft accommodation space is open to a space outside of said graft accommodation space, wherein said flange is configured to enclose and entrap a bone material based member (12, 14) within the graft accommodation space in close union with the cranium so as to apply pressure to the bone material based member to facilitate morphogenesis, whereby the bone material based member (12, 14) may be positioned within said graft accommodation space so as to be fused to the cranium and to extend away from said plate member; wherein said plate member is configured so as to define two of said graft accommodation spaces.