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Stryker Mobile Bearing Hip™ System

ADM Acetabular System with Rejuvenate Modular Stem
ADM Acetabular System with Rejuvenate Modular Stem
ADM Acetabular System with Rejuvenate Modular StemADM Acetabular System with BIOLOX* delta Ceramic Head and X3 Advanced Bearing TechnologyADM Acetabular Shell with Iliopsoas Tendon Cut Out

ADM X3

Introducing the first anatomic mobile bearing hip system from Stryker. Stryker’s ADM X3 large-head technology solution is designed to offer the benefits of a large diameter bearing without metal-on-metal articulation.

The combination of a mobile bearing hip design and the X3 advanced bearing technology offers surgeons a solution to address the clinical issues of implant wear1,2 and stability3 following THA.



Features & Benefits

  • Anatomic Mobility
    - The large polyethylene head allows for increased range of motion.
    - Based on laboratory testing, ADM X3 with a 54mm cup and 48mm head provides greater A/P range of motion (145O) compared to a fixed bearing construct with a 54mm cup and 44mm head. (138 O).4
  • Implant Longevity
    - Designed to help minimize the risk of wear and consequently may prolong the life of the implant.
    - Incorporates the design philosophy of low friction arthroplasty with the use of a small diameter head on polyethylene that helps to reduce wear.
    - X3 laboratory testing shows a 97% reduction in wear compared to conventional polyethylene.6
  • Joint Stability
    - Increased jump distance offers additional protection against dislocation.
    - Based on laboratory testing, ADM allows more than 3 times greater jump distance than competitive hard-on-hard bearings.7

References

1. Stryker Test Report: RD-09-085.

2. Stryker Test Report: RD-09-079.

3. Stryker Test Report: RD-09-068.

4. Stryker Test Report: RD-06-078.

5.

6. 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 invitro 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. d, e, f.

    d. Wang A. et al. Tribology International, Vol. 31, No. 1-3:17-33, 1998.

    e. Essner A. et al. 44th Annual Meeting, ORS, New Orleans, Mar. 16-19, 1998:774.

    f. Essner A. et al. 47th Annual Meeting, ORS, San Francisco, Feb. 25-28, 2001:1007.

7. Stryker R&D Test Report #RD-09-068.