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Scorpio Single Axis

Oxidation Resistance

X3 Advanced Bearing Technology demonstrates high oxidation resistance under extreme laboratory conditions (immersion in 5 atmospheres of oxygen at 70 degrees Celsius for 14 days).1 With Stryker X3 Advanced Bearing Technology, surgeons and hospitals may now offer their patients improved wear resistance in tibial inserts and patellar components that maintain the strength characteristics of conventional polyethylene.

Stryker X3 shows excellent laboratory test results across all three key performance categories: excellent mechanical and fatigue properties,2-7 improved wear performance1-4 and high resistance to oxidation.8,9

As a pioneer in wear performance technologies, Stryker Orthopaedics remains dedicated to developing improved bearing surfaces. Offering quality products to help advance patient care is a priority that Stryker shares with all who we serve. We fully endorse the technology of X3 Advanced Bearing Technology for hips and knees and look forward to working with you to implement its use in your hospital.

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, Scorpio Single Axis. All other trademarks are trademarks of their respective owners or holders.
References

1. Yau, S.S.,Wang, A., Essner, A.,Manley, M., Dumbleton, J., “Sequential Irradiation and Annealing of highly Crosslinked Polyethylenes: Resist Oxidation without Sacrificing Physical/Mechanical Properties,” Transactions of the 51st Annual Meeting of the Orthopaedic Research Society, Washington, DC 2005:1670.

2. Wang, A.,Manley, M., Serkeian, P., “Wear and Structural Fatigue Simulation of Crosslinked Ultra-High Molecular Weight Polyethylene for Hip and Knee Bearing Applications,” Crosslinked and Thermally Treated Ultra-High Molecular Weight Polyethylene for Joint Replacements, ASTM STP1445, Kurtz, S.M., Gsell, R., and Martell, J., Eds., ASTM International,West Conshohecken, PA 2003, pp. 151-168.

3. Yau, S.S.,Wang, A., Essner, A.,Manley, M., Dumbleton, J., “Sequential Irradiation and Annealing of highly Crosslinked Polyethylenes: Resist Oxidation without Sacrificing Physical/Mechanical Properties,” Transactions of the 51st Annual Meeting of the Orthopaedic Research Society,Washington, DC 2005:1670.

4. Essner, A., Yau, S.S., Schmidig, G.,Wang, A., Dumbleton, J., Manley, M., Serekian, P., “Reducing Hip Wear Without Compromising Mechanical Strength: A Next Generation Crosslinked and Annealed Polyethylene.” Transactions of the 5th Combined Meeting of the Orthopaedic Research Societies of Canada, USA, Japan and Europe, Calgary, Canada 2004: 80.

5. Essner, A., Herrera, L., Yau, S.S.,Wang, A., Dumbleton, J.H.,Manley, M.T., “Sequentially Crosslinked and Annealed UHMWPE CR Knee Wear,” Transactions of the 51st Annual Meeting of the Orthopaedic Research Society,Washington, DC 2005: 312.

6. Essner, A., Zeng, H., Yau, S.S.,Wang, A., Dumbleton, J.H.,Manley, M.T., “Stair Climbing Knee Wear Simulation: Sequentially Crosslinked and Annealed UHMWPE,” Transactions of the 30th Annual Meeting of the Society for Biomaterials, Memphis 2005: 199.

7. X3 UHMWPE maintains mechanical properties for Tensile Yield Strength and Ultimate Tensile Strength of N/2 Vac gamma sterilized UHMWPE as measured by ASTM D638. Tensile Yield Strength was 23.2 +/- 0.4 MPa and 23.5 +/- 0.3 MPa for N2/Vac UHMWPE and X3 UHMWPE, respectively. Ultimate Tensile Strength was 54.8 +/- 2.5 MPa and 56.7 +/- 2.1 MPa for N2/Vac UHMWPE and X3 UHMWPE, respectively.

8. X3 UHMWPE maintains mechanical properties after accelerated oxidative aging. No statistical difference was found for Tensile Yield Strength, Ultimate Tensile Strength and Elongation as measured per ASTM D638 before and after exposure to ASTM F2003 accelerated aging (5 Atmospheres (ATM) of oxygen at 70ºC for 14 days). Tensile Yield Strength was 23.5 +/- 0.3 MPa and 23.6 +/- 0.2 MPa, Ultimate Tensile Strength was 56.7 +/- 2.1 MPa and 56.3 +/- 2.3 MPa and Elongation was 267 +/- 7% and 266 +/- 9% before and after accelerated oxidative aging, respectively.

9. X3 UHMWPE resists the effects of oxidation. No statistical difference was found for Tensile Yield Strength, Elongation, Crystallinity and Density as measured per ASTM D638, D3417 and D1505 before and after ASTM F2003 accelerated aging (5 ATM of oxygen at 70ºC for 14 days). Tensile Yield Strength was 23.5 +/- 0.3 MPa, and 23.6 +/- 0.2 MPa Ultimate Tensile Strength was 56.7 +/- 2.1 MPa and 56.3 +/- 2.3 MPa, Elongation was 267 +/- 7% and 266 +/- 9%, Crystallinity was 61.7 +/- 0.6% and 61.0 +/- 0.5% and Density was 939.2 +/- 0.1kg/m3 before and after accelerated oxidative aging, respectively.