Define interface: a surface forming a common boundary of two bodies, spaces, or phases â interface in a sentence a surface forming a common boundary of two bodies, spaces, or phasesâ¦ See the full definition
Ankylosing Spondylitis (AS) is a type of progressive arthritis that leads to chronic inflammation of the spine and sacroiliac joints. It can also affect other joints and organs in the body, such as the eyes, lungs, kidneys, shoulders, knees, hips, heart, and ankles.
Ankylosing spondylitis can cause an overgrowth of the bones, which may lead to abnormal joining of bones, called bony fusion. Fusion affecting bones of the neck, back, or hips may impair a person's ability to perform routine activities.