Disassembly Forces of Hip Liner Locking Mechanism
This test method determines the force required to disengage the hip liner from the acetabular shell. Test methods include: axial disassembly (push-out), pull out or lever out, and torque out disassembly. The axial disassembly test measures the locking strength of the liner. The pull out or lever out test simulates the resistance of the liner to disengage due to impingement. The final test method simulates the resistance of the locking mechanism to a high friction event that attempts to rotate the liner within the shell. Five samples are tested for each test method.