The causes of SI joint dysfunction or injury to the SI joint are many. Due to the demand for increased mobility in surrounding joints, lumbar fusion can also enhance the mobility of the SI joint, and thus also be the cause for increased SI pain and dysfunction. Sacral Iliac dysfunction may vary from a joint that is hypermobile, to a joint that is fixed in position, causing irritation to the joint and the surrounding tissues. Persistent, one-sided low back pain or pain is moving from side to side, may be a sign of SI joint dysfunction.
- What is your sacral iliac joint? Also called the SI joint, it is located between the sacrum, the large wedge shaped bone at the end of your spine
- The primary purpose of these joints is to transfer the weight of the upper body to the lower extremities
- There is a small amount movement at this joint, 1-2 degrees, but basically it is very stable
“Studies over the last few decades estimate that between 15 percent and 40 percent of acute and chronic low back pain is coming from the SI joint.”