Patent ID: 8778026

Claim:
An artificial SI-Joint implant, the implant comprising: a sacrum component having a foundation comprising a first side and a second side, the first side coupled to a sacrum ridge and the second side coupled to a fitting member; and an ilium component having a base comprising a third side and a fourth side opposite the third side, the third side having a polybearing adapted for engaging the fitting member of the sacrum component to allow movement of the ilium component or sacrum component relative to the other component, wherein the sacrum component has a first radius of curvature and the ilium component has a second radius of curvature, the first and second radius of curvatures being between about 10 mm to about 70 mm, wherein the ilium component comprises an ilium ridge configured for insertion into the ilium, the ridge located on the fourth side of the ilium component, wherein the ilium ridge has a ridge radius of curvature adapted to match a bearing radius of curvature for a bearing surface of the ilium component.