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X3 Bearing Technology

Wear Matters

Hip simulator testing of X3 demonstrates a 97 percent reduction in wear over conventional polyethylene1, compared with a 90 percent reduction in wear for first generation highly crosslinked polyethylene.2-7

Further hip simulator testing revealed that for X3 polyethylene; wear did not vary significantly with head size or polyethylene thickness in the range shown.8

Stryker Corporation or its divisions or other corporate affiliated entities own, use or have applied for the following trademark(s) or service mark(s): X3 Advanced Bearing Technology. All other trademarks are trademarks of their respective owners or holders.
References

1. Stryker Orthopaedics Trident Acetabular Inserts made of X3 , 721-00-32E, show a 97percent reduction in volumetric wear rate versus the same insert fabricated from N2/Vac gamma sterilized, 620-00-32E. The insert tested was 7.5 mm thick with an diameter of 32 mm. Testing was conducted under multi-axial hip joint simulation for 5 million cycles using a 32mm CoCr articulating counterface and calf serum lubricant. X3 UHMWPE Trident Acetabular Inserts showed a net weight gain due to fluid.

2. Wilmann G, “Ceramics for Total Hip Replacement - What a Surgeon Should Know,” Orthopedics, Vol. 1998, No. 2, February 1998.

3. Howmedica Osteonics White Paper, Literature No. LSA23.

4. Schmalzried T, et al, “Long-Duration Metal-on-Metal Total Hip Arthroplasties with Low Wear of the Articulating Surfaces,” Journal of, Vol. 11, No. 3, 1996.

5. Stryker test report: RD-02-056.

6. Stryker test report: RD-04-099

7. Taylor SK, Serekian P, Manley, M, “Wear Performance of a Contemporary Alumina: Alumina Bearing Couple Under Hip Joint Simulation,” Trans. 44th Ann. Mtg. ORS, 51, 1998.

8. Stryker test report RD-04-029.