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Zimmer, Inc.

Zimmer® Trabecular Metal™ CR/LPS Monoblock Tibia

Product Description

Zimmer Trabecular Metal Material resembles trabecular bone in its cellular structure and weight-bearing characteristics.* By approximating the mechanical properties of bone, Trabecular Metal Material supports bone ingrowth. Clinical experience in thousands of cases has shown the versatility of Trabecular Metal Technology in diverse orthopaedic applications.

*Bobyn JD, Hacking SA, Chan SP, Toh KK, Krygier JJ, Tanzer M. Characterization of a new porous tantalum biomaterial for reconstructive orthopaedics. Scientific Exhibition: 66th Annual Meeting of the American Academy of Orthopaedic Surgeons; 1999; Anaheim, CA.

Zimmer® Trabecular Metal Technology

Trabecular Metal™ Monoblock Tibial Components

No other porous material so closely resembles the structure, function and physiology of trabecular bone.

Trabecular Metal Material is a highly porous structure with a nano-textured strut architecture that creates an initial scratch fit and facilitates the long-term biologic attachment of orthopaedic implants via bone ingrowth. Trabecular Metal Material is the most advanced fixation surface available for orthopaedic implants. Clinical use since 1997 demonstrates that this innovative technology provides excellent initial scratch fit and stable, long-term fixation. No other porous metal material so closely resembles the structure, function and physiology of cancellous bone.

Learn more about Trabecular Metal Technology at  tmt.zimmer.com.

Trabecular Metal has a coefficient of friction of .98 against cancellous bone. This produces a good "scratch fit" and increases the material's initial fixation and stability to bone. Good initial fixation secures the implant in place, allowing time for bony ingrowth and ongrowth.

Trabecular Metal Material is ductile, which means it has a "bend before break" quality. The structure of Trabecular Metal allows it to withstand physiological loading. Its flexibility is similar to bone and in turn reduces the potential for stress shielding. The implant moves with the bone, allowing the underlying bone to become stronger and denser.

Trabecular Metal Material has more than 10 years of clinical results and has been used in over 200,000 joint replacement cases worldwide.

Indications

This device is indicated for patients with severe knee pain and disability due to:

  • Rheumatoid arthritis, osteoarthritis, traumatic arthritis, polyarthritis
  • Collagen disorders, and/or avascular necrosis of the femoral condyle
  • Post-traumatic loss of joint configuration, particularly when there is patello-femoral erosion, dysfunction or prior patellectomy
  • Moderate valgus, varus, or flexion deformities

The salvage of previously failed surgical attempts or for a knee in which satisfactory stability in flexion cannot be obtained at the time of surgery.

NexGen Trabecular Metal Tibial Trays may be used with or without bone cement (biological fixation). NexGen MIS Tibial Components and MIS Modular Tibial Plates and Keels are intended for cemented use only.

Individualization of Treatment

Check the appropriate knee implant size-matching chart for component matching instructions. Mismatching may result in poor surface contact and could produce pain, decrease wear resistance, produce instability of the implant, or otherwise reduce implant life.

Use only instruments and provisionals specifically designed for use with these devices to help ensure accurate surgical implantation, soft-tissue balancing, and evaluation of knee function.

Contraindications

Contraindications include:

  • Previous history of infection in the affected joint and/or local/systemic infection that may affect the prosthetic joint
  • Insufficient bone stock on the tibial surface
  • Skeletal immaturity
  • Neuropathic arthropathy
  • Osteoporosis or any loss of musculature or neuromuscular disease that compromises the affected limb
  • A stable, painless arthrodesis in a satisfactory functional position
  • Severe instability secondary to the absence of collateral ligament integrity

Total knee arthroplasty is contraindicated in patients who have rheumatoid arthritis (RA) and an ulcer of the skin or a history of recurrent breakdown of the skin because their risk of postoperative infection is greater. RA patients using steroids may also have increased risk of infection. Late infections in RA patients have been reported 24+ months postoperative.