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  3. SIGMA™ Total Knee System

SIGMA™ Total Knee System

SIGMA™ Total Knee System

The SIGMA™ Knee System offers one of today’s most comprehensive, integrated knee systems. Based on the clinically successful P.F.C. Total Knee System, the SIGMA Knee continues a history on innovation based on clinical evidence. 

The SIGMA™ Knee embraces a wide variety of surgeon philosophies and surgical techniques, while providing function, clinical results, and a variety of options for today’s patients. Available in posterior cruciate retaining or posterior stabilized femoral component designs, and fixed and mobile-bearing tibial component designs, this knee system is designed to provide surgical solutions for a variety of clinical indications.

The SIGMA Knee System

IMAGES

The SIGMA Knee System

Key Resources

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Surgical Technique Guide

SIGMA™ CR 150 Knee System Surgical Technique
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Surgical Technique Guide

P.F.C. SIGMA™ RP Knee Surgical Technique
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Surgical Technique Guide

TKR Cementing Guide

Features & Benefits

Fixed Bearing Technology

Highly polished cobalt chrome tibial tray provides smooth surface to reduce polyethylene wear.1 i2 locking mechanism with an interference fit for decreased micromotion.2 Features XLK polyethylene, a moderately cross-linked, oxidatively stable material.

MBT Rotating Platform Technology

Rotational freedom to actively diffuse loosening forces.3 Self-aligning bearing is designed to decouple flexion-extension and rotation into two unidirectional motions. Rotating platform tibial inserts available in AOX™ Antioxidant Polyethylene, featuring COVERNOX™ Antioxidant.

High Flexion

SIGMA RP-F Rotating Platform Knee accommodates 155 degrees of flexion with increased contact area in high flexion. SIGMA CR150 Knee, available in fixed bearing or rotating platform options, accommodates 150 degrees of flexion.

References

  1. DePuy Synthes. Laboratory WR Add/Change Form. 03/23/2010. Legacy Research Reports Compliance Builder. #WR010120. 
  2. Leisinger, S., S. Hazebrouck and D. Deffenbaugh. "A New Approach to Micromotion Characterization of Modular Tibia Implants." 54th Annual Meeting of the Orthopaedic Research Society, Poster No. 1952, March 2-5, 2008, San Francisco, CA.
  3. Bottlang, M., K.E. Oliver, E. Lacatusu, M.B. Sommers, O. Kessler. "A Mobile-bearing Knee Prosthesis Can Reduce Strain at the Proximal Tibia." Clinical Orthopaedics and Related Research. No. 447, pp. 105-111.
  4. King, R. et al "Characterization of Gamma-Irradiated UHMWPE Stabilized with a Hindered Phenol Antioxidant." ORS Annual Meeting, 2009; Poster #19.    

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