is a synovial plane joint with irregular elevations and depressions that produce interlocking of the two bones. The human body has two sacroiliac joints, one on the left and one on the right, that often match each other but are highly variable from person to person.

Structure

Sacroiliac joints are paired C-shaped or L-shaped joints capable of a small amount of movement (2-18 degrees, which is debatable at this time) that are formed between the

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