According to a more current literature report, the compressive modulus of Trabecular Metal Material is 3.1GPa.9

  • Biomet appears to be trying to create an issue without a problem.  The fact is, the moduli of Regenerex (1.9GPa)* and Trabecular Metal Material (1.5GPa – 3.1GPa)2,9 are similar.
  • Trabecular Metal Material can be used as a coating and as a stand-alone, load-bearing material.  In fact, Zimmer offers stand-alone Trabecular Metal Products for the hip, knee, extremities, and spine…and our science is backed by 10 years of clinical success.  Does Regenerex offer this same versatility?

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References

  1. Bobyn JD, Hacking SA, Krygier JJ, Chan SP, Toh KK, Tanzer M. Characterization of a new porous tantalum biomaterial for reconstructive orthopaedics Scientific Exhibition: 66th Annual Meeting of the American Academy of Orthopaedic Surgeons; February 4-8, 1999; Anaheim, CA.
  2. Zardiackas LD, Parsell DE, Dillon LD, Mitchess DW, Nunnery LA, Poggie R. Structure, metallurgy, and mechanical properties of a porous tantalum foam . J Biomed Mater Res. 2001;58(2):180-187.
  3. Lewallen DG, Meneghini M, Mardones RM, Poggie RA, Hanssen AD. Revision hip arthroplasty with porous tantanlum augments and acetabular shells. Scientific Exhibition: 2006 Annual Meeting of the American Academy of Orthopaedic Surgeons; March 22-26, 2006; Chicago, IL.
  4. Macheras GA, Papagelopoulos PJ, Kateros K, Kostakos AT, Baltas D, Karachalios TS. Radiological evaluation of the metal-bone interface of porous tantalum monoblock acetabular component. J Bone Joint Surg (Br). March 2006;88(3):304-309.
  5. Gruen TA, Poggie RA, Lewallen DG, et al. Radiographic evaluation of a monoblock acetabular component—a multicenter study with 2- to 5-year results. J Arthroplasty. 2005;20(3):369-378.
  6. Hacking SA, Bobyn JD, Toh K, Tanzer M, Krygier JJ. Fibrous tissue ingrowth and attachment to porous tantalum. J Biomed Mater Res. December 15, 2000;52(4):631-638.
  7. Zhang Y, Ahn P, Fitzpatric D, Heiner A, Poggie R, Brown T. Interfacial frictional behavior: cancellous bone, and a novel porous tantalum biomaterial. J Musculoskeletal Res. 1999;3(4):245-251. 
  8. Shirazi-Adl A, Dammak M, Paiement G. Experimental determination of friction characteristics at the trabecular bone/porous-coated metal interface in cementless implants. J Biomed Mat Res. 1993;27:167-175.
  9. Medlin DJ, Charlebois S, Swarts D, Shetty R, Poggie RA. Metallurgical characterization of a porous tantalum biomaterial ( Trabecular Metal ™ ) for orthopaedic implant applications . ASM Materials and Processes for Medical Devices Conference; September 8-10, 2003; Anaheim CA.

* Biomet Orthopedics. Regenerex Porous Titanium Construct. 2006; Form No. Y-BMT-970/033106/M.