Liberty ATF dual mobility system

The dual articulation acetabular system consists of an acetabular shell and a polyethylene liner that freely rotates into the shell and positively captures the prosthetic head. This creates two articulations that share the same center: a small articulation between the metal head and the liner, and a large articulation between the liner and the metal shell. The objective of this dual articulation implant design is to maximize both implant stability and range of motion.