Trabecular Metal™ Primary Hip Prosthesis


Zimmer Biomet's Trabecular Metal Primary Hip Prosthesis combines the characteristics of Trabecular Metal Technology with a bone-conserving proximal design. Providing a high coefficient of friction against cancellous bone for scratch fit and initial implant stability, Trabecular Metal's highly porous, strut configuration nature and open pore-configuration enables biologic in-growth, which can help lead to long-term fixation.1

Key design features of the Trabecular Metal Primary Hip Prosthesis include:

  • Trabecular Metal Proximal Porous Coating provides for initial and long term implant stability1
  • 14° Proximal A/P Taper (7° per side) optimizes proximal load transfer by distributing more compressive forces in the proximal region of the femur to minimize stress shielding1-2  
  • Resistance to Subsidence proximal geometry of the stem, combined with the scratch fit and porous characteristics of the Trabecular Metal material enhances stability, helps resist subsidence and, in turn, reduces femoral hoop stress1-3  
  • Increased Rotational Stability the 23.5° neck resection angle helps retain proximal bone, which increases surface area contact with the Trabecular Metal material. This increases initial and rotational stability, as well as long-term biological fixation4-5
  • Optimized Soft Tissue Balance standard and extended offsets are offered to facilitate optimal anatomic soft tissue restoration. Extended offsets are achieved through a parallel neck shift of 5 mm without changing neck angle so leg length will not be affected
  • Full Range of Femoral Head Options a 12/14 neck taper accommodates a complete selection of metal and ceramic femoral heads

Additional Information

  1. Bobyn JD, Hacking SA, Chan SP, et al. Characterization of new porous tantalum biomaterial for reconstructive orthopaedics. Scientific Exhibition: 66th Annual Meeting of the American Academy of Orthopaedic Surgeons; 1999; Anaheim, CA.
  2. Zhang Y, Ahn PB, Fitzpatrick DC, Heiner AD, Poggie RA, Brown TD. Interfacial frictional behavior: cancellous bone, cortical bone, and a novel porous tantalum biomaterial. Journal of Musculoskeletal Research. 1999;3(4):245-251.
  3. Goldberg VM, Stevenson S, Feighan J, et al. Biology of grit blasted titanium alloy implants. Clin Orthop. 1995;319:122-129.
  4. Hacking SA, Bobyn JD, Toh K-K, et al. The osseous response to corundum blasted implant surfaces in a canine total hip arthroplasty model. Clin Orthop. 1999;364:240-253.
  5. Bobyn JD, Stackpool G, Toh K-K, et al. Characteristics of bone ingrowth and interface mechanics of a new porous tantalum biomaterial. J Bone Joint Surg. 1999;81-B:907-914. 



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