Over time, the inflammation destroys the intervertebral joints, as well as the facet joints, and the sacroiliac joints, and fibroblasts replace the destroyed joint with fibrin.

随着时间推移，炎症会破坏椎间盘、关节突关节和骶髂关节，而成纤维细胞会用纤维蛋白取代被破坏的关节组织。

Below that is a bone called the sacrum, which is attached to the pelvic bone on either side, called the ilium, and where they meet is the sacroiliac joint.

再往下是一块称为骶骨的骨头，分别连结于骨盆两侧的髂骨上，二者共同构成骶髂关节。