The durability of hip implants depends on many things including patient weight and activity level, as well as the implant’s bearing surface technology. The bearing surface is defined as the two parts of the hip that glide together throughout motion. Newer technologies, like ceramic and improved plastics, are particularly important for younger patients.
Stryker’s patented advanced bearing surface, called X3®, has demonstrated up to 97% decrease in wear in laboratory testing.1 This decrease in wear may extend the life of your hip implant.
In laboratory testing, Biolox delta ceramic is up to 50% stronger than alumina ceramic.2 The strength of this material allows manufacturing of increased number of sizes of femoral heads so your doctor has a broader implant selection to choose the implant that fits you best.
Alumina ceramic bearings have demonstrated significantly lower wear versus conventional plastic-on-metal hip systems in the laboratory.3 It is anticipated that the improved wear characteristics of alumina ceramic will result in a longer lasting implant.
1. Stryker® Orthopaedics Trident® Acetabular Inserts made of X3® UHMWPE (unsterilized), 721-00-32E, show a 97% reduction in volumetric wear rate versus the same insert fabricated from N2\Vac™ gamma sterilized UHMWPE, 620-00-32E. The insert tested was 7.5mm thick with an inner diameter of 32mm. 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 absorption phenomena but yielded a positive slope and wear rate in linear regression analysis. Volumetric wear rates were 46.39 ± 11.42mm3/106 cycles for N2\Vac™ gamma sterilized UHMWPE inserts and 1.35 ± 0.68mm3/106 cycles for X3® UHMWPE (unsterilized) Trident® Acetabular Inserts. Although in-vitro hip wear simulation methods have not been shown to quantitatively predict clinical wear performance, the current model has been able to reproduce correct wear resistance rankings for some materials with documented clinical results.a, b, c.
Stryker Corporation or its divisions or other corporate affiliated entities own, use or have applied for the following trademarks or service marks: Stryker, Trident, X3. BIOLOX delta is a registered trademark of Cerasiv GmbH Innovatives Keramick-Engineering and CeramTec AG Innovative Ceramic Engineering. All other trademarks are trademarks of their respective owners or holders.