Classification of joints
• Synarthrosis: suture lines of the skull where adjoining cranial plates are separated by thin fibrous tissue.
• Amphiarthroses: adjacent bones are bound by flexible fibrocartilage that permits limited motion. Examples include the pubic symphysis, part of the sacroiliac joint, and intervertebral discs.
• Diarthroses (synovial joints): these are the most common and most mobile joints. All have a synovial lining. They are subclassified into ball and socket (hip), hinge (interphalangeal), saddle (first carpometacarpal), and plane (patellofemoral) joints.