Zimmer® Gender Solutions™ NexGen ® High-Flex Knee

Two Distinct Populations:  Women and Men

Pioneering research conducted by Zimmer has mapped the anatomical differences between

female and male knees,12,13 laying the foundation for the design and development of Gender Solutions High-Flex Femoral Implants.

  • Three-dimensional CT data was collected and analyzed for more than 800 femurs and patellas.

  • Significant differences were identified between female and male knee anatomy.

  • Plotting M/L and A/P dimensions of the distal femur reveals two distinct populations: female and male.

Implant designs that distinguish between female and male anatomical differences allow for improved implant fit and fewer intraoperative adjustments.Gender Solutions High-Flex Femoral Implants address the distinctive differences typically found in the female anatomy.

Mid-box M/L vs Overall A/P Gender M/L

“Historically we have shaped the patients to fit the implants. Now we have implants shaped to fit the patients.”

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References

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  2. Poilvache PL, Insall JN, Scuderi GR, Font-Rodriguez DE. Rotational landmarks and sizing of the distal femur in total knee arthroplasty, Clin Orthop. 1996;331:35-46.
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  9. U.S.Department of Health and Human Services, Centers for Disease Control and Prevention, National Centerfor Health Statistics. 2003 National Hospital Discharge Survey, Advance Data No. 359. July 8, 2005; Table 8:14.
  10. U.S.Department of Health and Human Services, Centers for Disease Control and Prevention, National Centerfor Health Statistics. 2003 National Hospital Discharge Survey, Advance Data No. 359. July 8, 2005; Table 10:16.
  11. Hawker G, Wright J, Coyte P, et al., Differences between men and women in the rate of use of hip and knee arthroplasty, The New England Journal of Medicine. 342:1016-1022, 2000.
  12. Mahfouz M, Booth R Jr, Argenson, J, Merkl, BC, Abdel Fatah EE, Kuhn MJ. Analysis of variation of adult femora using sex specific statistical atlases. Presented at: Computer Methods in Biomechanics and Biomedical Engineering Conference; 2006.
  13. Data on file at Zimmer
  14. Scott NW. Pearls on avoidance and treatment of intraoperative and postoperative complications – exposure of the stiff knee. Presented at: American Association of Hip and Knee Surgeons, Knee Society Specialty Day; March 25, 2006.
  15. Bengs BC, Scott RD. The effect of patellar thickness on intraoperative knee flexion and patellar tracking in total knee arthroplasty. J Arthroplasty. 2006;21(5):650-655.