What are Facet Joints?
Facet joints are located between and behind spinal vertebrae (bones of the spine) and prevent a person from over-twisting his or her spine, but still allow a person the movement needed to walk, swim, and live an active life. They act as spine stabilizers.
Facet joints are paired, with an upper half and a lower half that are attached to the backside of each vertebra. These halves slide on each other to allow movement. In normal circumstances, cartilage (soft bone) coats the joints to reduce friction and a small sack surrounding each joint provides lubricant. When the cartilage wears down or the lubricant is not as readily available, the joints may rub against each other, enlarge, and become arthritic. This is known as facet joint osteoarthritis or facet joint disorder.
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