The humeral cut guide member for the humeral head has a first patient-specific bone-engaging surface that is complementary and made so as to be substantially meshing and overlapping at a unique location on a particular patient's humeral head. A bone engagement member including a bone engagement member including and a second patient-specific bone engagement surface that is sized and configured to substantially mesh and overlap in a single location with a particular patient internodal groove The registration member connected to the member and the bone engaging member connected to the bone engaging member so that the cut guide plate is separated from the humeral head when the bone engaging member is engaged with the head of the humeral head of the specific patient and overlapped. A cut guide plate extending away from the cut guide plate, the cut guide plate defining an elongated slot.上腕骨頭用の上腕骨カットガイド部材は、特定患者の上腕骨頭上で唯一の位置において実質的に噛み合い組み重なるように相補的でありそのように作られる第１の患者固有の骨係合面を含む骨係合部材と、特定患者の結節間溝と唯一の位置において実質的に噛み合い組み重なるようなサイズを持ちそのように作られる第２の患者固有の骨係合面を含む、骨係合部材に接続されたレジストレーション部材と、骨係合部材が特定患者の上腕骨頭と噛み合い組み重なったとき、カットガイドプレートが上腕骨頭から離間するように骨係合部材に接続されかつ骨係合部材から離れて延びるカットガイドプレートと、を備え、カットガイドプレートは細長いスロットを画定する。
