Primary Total Knee Systems

The Evolution^® Medial-Pivot Knee System is designed to answer the limitations of traditional implants by delivering flexion stability, anatomic motion, and a wear–limiting design characteristics.

Evolution® NitrX™ Knee System

The Evolution® NitrX™ medial-pivot knee features a titanium niobium nitride (TiNbN) coating that has been shown to reduce the release of cobalt (Co), chromium (Cr), nickel (Ni), and molybdenum (Mb) ions common in standard CoCr implants.¹The Evolution® NitrX™ knee maintains the kinematic benefits of the medial-pivot design², resulting in optimal stability.⁵

Evolution® NitrX™ Medial-Pivot Knee System

Focus on rapid recovery

Metal sensitivity has been linked to metallic debris and metal ions, namely cobalt, chromium, and nickel. The Evolution® NitrX™
medial-pivot knee has been shown in simulated clinical testing to reduce the release of these metal ions¹, and builds upon the same medial-pivot legacy of 95% patient satisfaction with 98.8% survivorship at 17 years.³

Evolution® NitrX™ Knee Brochure

Additional NitrX™ Features

Additional features of the NitrX™ coating

• Increased hardness and wettability^1,4
• Excellent wear properties⁴
• High corrosion resistance^6-8
• Excellent Biocompatibility^1,4

Reduce the release of specific metal ions while promoting natural kinematics

The Evolution® NitrX™ knee features a titanium niobium nitride (TiNbN) coating, which creates a barrier against the potential release of metal ions common in cobalt chrome (CoCr) implants.¹ Since metal sensitivity in patients is linked to metallic debris and metal ions, namely cobalt, chromium and nickel, preventing that debris from interacting with soft tissue may have a benefit of reducing the incidence of tissue reactions.^10,11

Log in to view surgeon resources

, ,

PRECAUTIONS & DISCLAIMERS

Every patient is different, and individual results will vary. There are risks and recovery times associated with surgery.

This product is not for sale in the United States. Not all products and options are available in all countries.

References
1. MPO Data on file – Evolution® NitrX™ vs uncoated. Bench test results not necessarily indicative of clinical performance.
2. Dennis DA, Komistek RD, Mahfouz MR, Haas BD, Stiehl JB. Multicenter determination of in vivo kinematics after total kneearthroplasty. Clin Orthop Relat Res. 2003
3. Macheras GA et al A long term clinical outcome of the Medial Pivot Knee Arthroplasty System. Knee. 2017 Mar;24(2):447-453
4. http://dot-coatingusa.com/images/pdf/protection_against_allergic_reactions_through_ ceramic_coatings.pdf
5. Freeman MA, Pinskerova V. The movement of the knee studied by magnetic resonance imaging. Clin Orthop Relat Res. 2003;410:35-43
6. Kirmanidou, Yvoni et al. “New Ti-Alloys and Surface Modifications to Improve the Mechanical Properties and the Biological Response to Orthopedic and Dental Implants: A Review.” BioMed Research International 2016 (2016): 2908570. PMC. Web. 1 Oct. 2018
7. R. Thull, Corrosion behavior of dental alloys coated with Titanium Niobium Oxinitride, Deutsche Zahnärztliche Zeitschrift 1991Nov., Universität Würzburg
8. Test report DOT GmbH and Nordum GmbH, Examination of influence of PVD – coatings to the ion release of CoCrMo-alloys in SBF – buffer, 2006
9. M. Long, L. Riester, and G. Hunter, “Nano-hardness measurements of oxidized Zr-2.5Nb and various orthopaedic materials”, Trans. Soc. Biomaterials, 21, 1998, p. 528.
10. Lachiewicz, Watters, Jacobs. “Metal Hypersensitivity and Total Knee Arthroplasty.” J Am Acad Orthop Surg. 2016 February ; 24(2): 106–112. doi:10.5435/JAAOS-D-14-00290
11. Hallab, Merrit, Jacobs. “Metal Sensitivity in Patients with Orthopaedic Implants.” J. Bone Joint Surg. Am. 83:428-, 2001.

Find a local expert

Surgeons in over 70 countries utilize MicroPort Orthopedics Hip & Knee products. Our national sales team is ready to answer any question you have.

Find a Surgeon

MicroPort Uses Cookies

External Link

Primary​ Total Knee Systems

Evolution® NitrX™ Knee System

Focus on rapid recovery

Additional NitrX™ Features

Reduce the release of specific metal ions while promoting natural kinematics

Log in to view surgeon resources

Related Products

Evolution® BioFoam® Knee system

Evolution® Cemented Knee Systems

Advance® Knee System

Find a local expert

Primary Total Knee Systems