Apparatus for repairing a shoulder joint, said apparatus comprising: a baseplate for mounting to a glenoid, said baseplate comprising: a base portion comprising a medially-facing surface and a laterally-facing surface, and at least one opening passing through said medially-facing surface and said laterally-facing surface for receiving at least one base portion screw and an anterior flange carried by said base portion, said anterior flange comprising an anteriorly-facing surface and a posteriorly-facing surface, said anterior flange extending away from, and perpendicular to, said medially-facing surface of said base portion, said anterior flange further comprising at least one opening passing through said anteriorly-facing surface and said posteriorly-facing surface for accepting at least one flange screw an articulating surface component for mounting to said laterally-facing surface of said base portion so as to substantially cover said laterally-facing surface of said base portion and an anterior cover for mounting to said anteriorly-facing surface of said anterior flange wherein said anterior cover is configured to lock said articulating surface component to said base portion, such that when said anterior cover is mounted to said anterior flange, said articulating surface component is locked to said base portion.
