Q. What is the SI joint? A. The full name is the sacroiliac (sa-krÅ-ˈi-lÄ“-ËŒak) joint, and there are two of them, one on either side of your tailbone. They connect the triangular bone at the base of ...

2 Department of Physical Medicine and Rehabilitation, Mayo Clinic college of Medicine, Mayo Clinic Sports Medicine Center, Rochester, Minnesota, USA Background The use of diagnostic and interventional ...