PSA™

PTG contrained posterior stabilised

The U2 Knee™ System, designed by the United Orthopedic, is a complete range of 1st line treatment PTGs: Fixed and mobile CR, fixed and mobile PS and PSA revision with constrained insert.

The fixed tibial baseplate is commonly used in fixed cruciate-retaining (U2 CMA™) and posterior stabilised (U2 PS™) fixed inserts.

The mobile tibial baseplate is commonly used in cruciate-retaining (U2 MBC™) and posterior stabilised (U2 MB™) mobile inserts

DescriptionPSA femurBlocs and TibiasFemur / Tibia ConnectionInsertPatella
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Description

The PTG U2 PSA™ is a fixed-bearing femoral revision prosthesis with a fixed PS constrained insert.

The PSA femur has a multi-radius design with a “patella friendly” trochlear groove that promotes flexion and stability.

The femoral component and the tibial baseplate require the insertion of pins and enable the use of wedges.

The U2 Knee™ System provides the option of mixing a 1st line treatment CR or PS femur with a PSA tibia.

Classe de DM
Class III medical devices indicated for primary knee arthroplasty

Please read the product usage instructions carefully

Remboursement
Reimbursable by health insurance organizations under certain conditions. Consult the terms on the Ameli.fr website.

PSA femur

  • 6 sizes for the right and left

  • CrCoMo cementing version
  • Multi-radius design based on the range of U2 femurs
  • The deep and wide trochlear groove at a 4° valgus angle promotes stable patellar rolling of a natural or prosthetic patella
  • Flexion of up to 134° possible

    • Identical cage width for all sizes
    • Locking screw for locking the stem

Femoral wedges


  • CrCo alloy
  • Posterior: 4 and 8 mm thick
  • Distal: 4, 8, 12 and 16 mm thick

Tibia

  • 6 symmetrical sizes
  • Titanium alloy for cementing (TiAl6V4)
  • Locking screw for locking in the insert/stem

Tibial wedges



  • Titanium half-wedges
  • Thickness: 5, 10 and 15 mm
  • With fixing screw

Extension stems for femur/tibia

  • Uncemented titanium alloy
  • Ø 10 to 20 mm
  • Straight stems 30, 75, 100, 150 and 200 mm in length

  • Curved stems 150, 200 mm in length

Femur/Tibia offset adapter

  • Titanium alloy
  • 2, 4 and 6 mm offset

Insert

  • 6 symmetrical sizes
  • Thickness: 9, 11, 13, 15, 18, 21 and 25 mm
  • Locking screw for locking in the insert/stem

Constrained design to improve stability

  • Flexion of up to 134°
  • I/E rotation +/- 3.7° (close to natural knee)
  • Varus-valgus constrained +/- 1.4°
  • Optimised congruence to reduce wear: 30/32 radius
  • Early post-cam engagement from 40°
  • Significant cam height before dislocation: 21.4 mm

Compatibility of the U2 range

Patella

  • surface
  • embedded

USTAR IIU2 MB