U2 PSA Revision Knee™ System

U2 PSA Revision Knee System

Overview

With its 134° high-flexion design and full compatibility with our U2 Knee™ primary system United Orthopedic's U2 PSA Revision Knee™ is designed to provide predictable stability and positive outcomes.

Includes: Femoral component; tibial insert and augment; extension press-fit stem; femora augment (posterior and distal); tibial baseplate.

U2 PSA Revision Knee™ and instruments are designed and manufactured exclusively by United Orthopedic Corporation.

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Components of the U2 PSA Revision Knee™ are fully interchangeable with United Orthopedics' U2 Knee™ primary system. The 21.4 mm high jumping distance (femur) enhances security and stability, while the femoral-tibial curve-on-curve design improves constraint and reduces insert wear. Other notable design features include:

  • Up to 134° high flexion design (femur) — helps patients regain of range of motion and resume daily living activities.
    U2 PSA Revision Knee System
  • 40° engagement angle between Post and Cam (femur) — improves stability
    U2 PSA Revision Knee System
  • Controlled +-3.7° internal/external (I/E) rotation (femur) — emulates natural kinematics
    U2 PSA Revision Knee System
  • Restricted +-1.4° varus/valgus lift-off angle (femur) — improves stability
    U2 PSA Revision Knee System
  • Femoral locking screw with built-in C ring (femur) — prevents screw back out
    U2 PSA Revision Knee System
  • Tibial insert with metal reinforced ring — provides additional structural support and helps safeguard against femoral sheering forces.
    U2 PSA Revision Knee System
  • Fully interchangeable U2 Knee™ primary system — provides flexibility in OR.
    U2 PSA Revision Knee System

Prosthetic Materials and Design

Femoral Component: Cobalt-Chromium alloy
Tibial baseplate: Ti-6Al-4V alloy
Tibial insert: UHMWPE
Femoral augment: Cobalt-Chromium alloy
Tibial augment: Ti-6Al-4V alloy
Stem: Ti-6Al-4V alloy Cobalt-Chromium alloy

System Components

Both femoral and tibial offset instruments are available. Wide range of sizing options.

  • Femoral offset — PSA Femoral cutting guide, Femoral offset adaptor, Femoral offset bushing (2mm, 4mm)
    U2 PSA Revision Knee System
  • Tibial offset: Offset busing wrench, Tibial offset busing (2mm, 4mm)
    U2 PSA Revision Knee System

The U2 PSA Revision Knee™ is indicated in knee arthroplasty for reduction or relief of pain and/ or improved knee function in skeletally mature patients with severe knee pain and disability due to rheumatoid, osteoarthritis, primary and secondary traumatic arthritis, polyarthritis, collagen disorders, avascular necrosis of the femoral condyle or pseudogout, posttraumatic loss of joint configuration, particularly when there is patellofemoral erosion, dysfunction or prior patellectomy, moderate valgus, varus, or flexion contraction.

This device in intended for use in patients who require augmentation and/or stem extension due to inadequate bone stock and/or require constrained stabilization for tibiofemoral joint due to soft tissue imbalance.