An elbow prosthesis (2500,3000) comprising: a stem structure (2502,3002) operable to be positioned in a bone of a joint, the stem structure (2502,3002) including: a stem portion (2510, 3010) operable to be positioned in the bone; and a C-shaped body portion (2512, 3012) having a first retaining mechanism (2520, 3020) formed thereon; an articulating component (2504, 3004) having a second retaining mechanism (2544, 3044) formed thereon, a groove (2546,3046), and a bearing portion (2534, 3034), characterized in that said bearing portion (2534, 3034) has a first end (2536, 3036) defining a passage (2540, 3040) and a second end (2538, 3038) including a relief (2542,3042); and wherein the first retaining mechanism (2520,3020) comprises an extension portion (2522,3022) and a first anti-rotation portion (2524,3024), and the second retaining mechanism (2544,3044) comprises a receiving portion and a second anti-rotation portion (2548,3048), wherein the articulating component (2504, 3004) is advanced from an insertion position to an assembled position such that the first and second retaining mechanisms (2520, 3020; 2544, 3044) cooperatively mate to inhibit translation and rotation of the articulating component (2504, 3004) relative to the C-shaped body portion (2512, 3012) of the stem structure (2502, 3002), wherein the extension portion (2522, 3022) comprises a radially arcuate rail and the receiving portion comprises the groove (2546, 3046) that receives the rail in the assembled position, wherein the C-shaped body portion (2512, 3012) includes a catch (2532,3032) that cooperatively nests in the relief (2542,3042) of the bearing portion (2534, 3034) in the assembled position, and wherein the first anti-rotation portion (2524,3024) comprises a first wave-like pattern (2526, 3026) and the second anti-rotation portion (2548,3048) comprises a second wave-like pattern (2550, 3050) that cooperatively mates with the first wave-like pattern (2526, 3026) in the assembled position. a stem structure (2502,3002) operable to be positioned in a bone of a joint, the stem structure (2502,3002) including: a stem portion (2510, 3010) operable to be positioned in the bone; and a C-shaped body portion (2512, 3012) having a first retaining mechanism (2520, 3020) formed thereon; a stem portion (2510, 3010) operable to be positioned in the bone; and a C-shaped body portion (2512, 3012) having a first retaining mechanism (2520, 3020) formed thereon; an articulating component (2504, 3004) having a second retaining mechanism (2544, 3044) formed thereon, a groove (2546,3046), and a bearing portion (2534, 3034), characterized in that said bearing portion (2534, 3034) has a first end (2536, 3036) defining a passage (2540, 3040) and a second end (2538, 3038) including a relief (2542,3042); and wherein the first retaining mechanism (2520,3020) comprises an extension portion (2522,3022) and a first anti-rotation portion (2524,3024), and the second retaining mechanism (2544,3044) comprises a receiving portion and a second anti-rotation portion (2548,3048), wherein the articulating component (2504, 3004) is advanced from an insertion position to an assembled position such that the first and second retaining mechanisms (2520, 3020; 2544, 3044) cooperatively mate to inhibit translation and rotation of the articulating component (2504, 3004) relative to the C-shaped body portion (2512, 3012) of the stem structure (2502, 3002), wherein the extension portion (2522, 3022) comprises a radially arcuate rail and the receiving portion comprises the groove (2546, 3046) that receives the rail in the assembled position, wherein the C-shaped body portion (2512, 3012) includes a catch (2532,3032) that cooperatively nests in the relief (2542,3042) of the bearing portion (2534, 3034) in the assembled position, and wherein the first anti-rotation portion (2524,3024) comprises a first wave-like pattern (2526, 3026) and the second anti-rotation portion (2548,3048) comprises a second wave-like pattern (2550, 3050) that cooperatively mates with the first wave-like pattern (2526, 3026) in the assembled position.