GLOSSARY

The labrum is a fibrocartilaginous ring around the rim of the socket in the body’s two ball-and-socket joints, the shoulder and hip, deepening the socket.
The word comes from the Latin labrum, meaning “lip” or “rim”.

Types

• Glenoid labrum: around the glenoid cavity of the scapula; it deepens the socket by about 50 percent, and the tendon of the long head of biceps attaches to its upper part.
• Acetabular labrum: around the acetabulum of the pelvis; like a suction seal, it retains joint fluid and increases stability.

Function

Increasing the contact area and depth of the socket, joint