An orthopedic joint hinge assembly includes a first elongated member, a first coupler attached to the first elongated member and including a first interface surface, a second elongated member, and a second coupler attached to the second elongated member and including a second interface surface. Each of the first and second couplers is constrained to rotate about an axis of rotation. The first and second interface surfaces are offset from the axis of rotation and engage each other to block a relative rotation between the first and second members in a first direction and separate from each other to permit a relative rotation in an opposite direction.