A hinge is provided for an orthopedic brace having a first rotation plate, a second rotation plate, a pivotal connector connecting the first and second rotation plates, a rotation limiting mechanism, and a rotation locking mechanism. The rotation limiting mechanism includes a rotation limiting face formed in the peripheral edge of the second rotation plate and a rotation limiting assembly selectively positionable in a fixed position relative to the first rotation plate. The rotation limiting assembly has a stop face engageable with the rotation limiting face upon rotation of the first and second rotation plates, which limits further rotation in a first rotation direction. The rotation locking mechanism includes a rotation lock pin and a series of lock notches formed in the peripheral edge of the second rotation plate. The rotation lock pin is selectively positionable within one of the series of lock notches, which substantially locks the first and second rotation plates against rotation in the first rotation direction or in a second rotation direction opposite the first.