Division: Knee Reconstruction
Category: Revision Knees
The SIGMA® TC3 Systemdesign is the most constrained device available within the P.F.C.® SIGMA® Knee System and is indicated for use in cases where collateral ligaments are deficient. This comprehensive system offers both a fixed bearing and rotating platform option. Additionally surgeons are able to address bone and soft tissue defects with a variety of products including augments, wedges, stems, and metaphyseal sleeves. This system’s approach to revision knee surgery provides the surgeon with maximum intra-operative flexibility.
Total knee arthroplasty is intended to provide increased patient mobility and reduced pain by replacing the damaged knee joint articulation in patients where there is evidence of sufficient sound bone to seat and support the components. TKA is indicated for: a severely painful and/or severely disabled joint resulting from osteoarthritis, post-traumatic arthritis, rheumatoid arthritis, or a failed previous implant.
|Unique tibial bearing options||
Allows for either rotating platform or fixed bearing tibial constructsOnly company to provide rotating platform in the revision constraint (varus valgus constraint) level
|Common MBT Revision Tibial Base used across constraint levels||
Address an array of patient needs
OR efficiency with common tibial base and preparation as used in higher constrained implant optionsAllows for bearing rotation that reduces torsional stresses on tibial base1
|Metaphyseal sleeves for tibia and femur||
Modular porous sleeves accommodate Engh Type II bone defects
Provide rotational stability
Compressively load the bone according to Wolff’s Law
Intra-operative flexibilityRestores varying patient anatomies
Common instrumentation if need to increase levels of constraintAddresses an array of patient needs
1Bottlang, M. et al. “A Mobile-bearing Knee Prosthesis Can Reduce Strain at the Proximal Tibia.” Clinical Orthopaedics and Related Research, 447 June 2006: 105-111.