A shoulder prosthesis system (1400, 1500, 1600, 1700, 1800, 1900, 2000, 2100), comprising: a plate (200, 700, 1000, 1480, 1580, 1680, 1780, 1880, 1980, 2080, 2180) configured to be attached to a portion of a shoulder bone, the plate (200, 700, 1000, 1480, 1580, 1680, 1780, 1880, 1980, 2080, 2180) including a plate body (220, 704, 1004) including a first plate surface (212, 708, 1008) and a second plate surface (216, 712) opposite the first plate surface (212, 708, 1008), the plate (200, 700, 1000, 1480, 1580, 1680, 1780, 1880, 1980, 2080, 2180) including an engagement member (228, 720) extending from the second plate surface (216, 712), the plate (200, 700, 1000, 1480, 1580, 1680, 1780, 1880, 1980, 2080, 2180) configured to receive a plurality of plate fixation members (208, 1050, 1482), the plurality of plate fixation members (208, 1050, 1482) configured to attach the plate (200, 700, 1000, 1480, 1580, 1680, 1780, 1880, 1980, 2080, 2180) to the portion of the shoulder bone; a glenosphere (100, 500, 600, 800, 900, 1100, 1200, 1300, 1460, 1560, 1660, 1760, 1860, 1960, 2060, 2160) including a glenosphere body (104, 504, 604, 804, 904, 1104, 1204, 1304) including a first body surface (112, 512, 912, 1108, 1208, 1308) and a spherical second body surface (124, 524, 624, 824, 924, 1112, 1212, 1313), the first body surface (112, 512, 912, 1108, 1208, 1308) including a plate engagement region (1472, 2172), the plate engagement region (1472, 2172) configured to engage with the engagement member (228, 720) of the plate (200, 700, 1000, 1480, 1580, 1680, 1780, 1880, 1980, 2080, 2180); and an insert component (1410, 1510, 1610, 1710, 1810, 1910, 2010, 2110) including an insert body including a first insert surface (1412, 1812, 2012, 2164), a second insert surface (1416, 1816, 2016, 2168), and a third insert surface (1420, 1820), the first insert surface (1412, 1812, 2012, 2164) configured to engage the shoulder bone, characterised in that the first body surface of the glenosphere includes an insert engagement region (1476, 1662, 2176) and the second insert surface (1416, 1816, 2016, 2168) of the insert component is configured to engage with the insert engagement region (1476, 1662, 2176) of the glenosphere (100, 500, 600, 800, 900, 1100, 1200, 1300, 1460, 1560, 1660, 1760, 1860, 1960, 2060, 2160). a plate (200, 700, 1000, 1480, 1580, 1680, 1780, 1880, 1980, 2080, 2180) configured to be attached to a portion of a shoulder bone, the plate (200, 700, 1000, 1480, 1580, 1680, 1780, 1880, 1980, 2080, 2180) including a plate body (220, 704, 1004) including a first plate surface (212, 708, 1008) and a second plate surface (216, 712) opposite the first plate surface (212, 708, 1008), the plate (200, 700, 1000, 1480, 1580, 1680, 1780, 1880, 1980, 2080, 2180) including an engagement member (228, 720) extending from the second plate surface (216, 712), the plate (200, 700, 1000, 1480, 1580, 1680, 1780, 1880, 1980, 2080, 2180) configured to receive a plurality of plate fixation members (208, 1050, 1482), the plurality of plate fixation members (208, 1050, 1482) configured to attach the plate (200, 700, 1000, 1480, 1580, 1680, 1780, 1880, 1980, 2080, 2180) to the portion of the shoulder bone; a glenosphere (100, 500, 600, 800, 900, 1100, 1200, 1300, 1460, 1560, 1660, 1760, 1860, 1960, 2060, 2160) including a glenosphere body (104, 504, 604, 804, 904, 1104, 1204, 1304) including a first body surface (112, 512, 912, 1108, 1208, 1308) and a spherical second body surface (124, 524, 624, 824, 924, 1112, 1212, 1313), the first body surface (112, 512, 912, 1108, 1208, 1308) including a plate engagement region (1472, 2172), the plate engagement region (1472, 2172) configured to engage with the engagement member (228, 720) of the plate (200, 700, 1000, 1480, 1580, 1680, 1780, 1880, 1980, 2080, 2180); and an insert component (1410, 1510, 1610, 1710, 1810, 1910, 2010, 2110) including an insert body including a first insert surface (1412, 1812, 2012, 2164), a second insert surface (1416, 1816, 2016, 2168), and a third insert surface (1420, 1820), the first insert surface (1412, 1812, 2012, 2164) configured to engage the shoulder bone, characterised in that the first body surface of the glenosphere includes an insert engagement region (1476, 1662, 2176) and the second insert surface (1416, 1816, 2016, 2168) of the insert component is configured to engage with the insert engagement region (1476, 1662, 2176) of the glenosphere (100, 500, 600, 800, 900, 1100, 1200, 1300, 1460, 1560, 1660, 1760, 1860, 1960, 2060, 2160).