Zimmer Trabecular Metal™ Tibial Tray

The Trabecular Metal Tibial Tray unites stable fixation with modular components to meet a growing demand for knees implanted through mini-arthrotomies. With mechanical properties similar to cancellous bone, Trabecular Metal Technology is designed to achieve stable initial fixation. The separate articulating surface is available in Prolong® Highly Crosslinked Polyethylene, which is specifically designed to reduce wear and delamination.* And the modular components work with the Zimmer ® Minimally Invasive Solutions™ procedures.

*The results of in vitro wear and delamination tests have not been shown to correlate with clinical wear and delamination mechanisms.

Technology

Zimmer® Trabecular Metal Technology. 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 orthopedic implants via bone ingrowth. Trabecular Metal Material is the most advanced fixation surface available for orthopedic 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 Material 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 Material 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 has more than 10 years of clinical results and has been used in over 200,000 joint replacement cases worldwide.

Indications

Indications

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

  • Collagen disorders, and/or avascular necrosis of the femoral condyle
  • Post-traumatic loss of joint configuration, particularly when there is patellofemoral 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 Trabucelar Metal Tibial Trays may be used with or without bone cement (biological fixation)

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.

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