CORI the first digital tensioning device

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Smith+Nephew introduces CORI

the first digital tensioning device for robotic total knee arthroplasty.


Smith+Nephew  introduced its new CORI Digital Tensioner – a purpose built device that lets surgeons measure the ligament tension in a knee prior to cutting bone. By enabling a surgeon to quantify joint laxity in the native knee and achieve an optimal ligament tensioning force, the CORI Digital Tensioner helps to reduce variability when balancing the knee in surgery.This helps make surgical planning more objective versus other commercially available alternatives.

Personalizing Surgery and Helping Reduce Variability in Robotics-assisted TKA
The CORI Digital Tensioner produces a surgeon-defined, quantifiable force to distract the knee joint, apply consistent tension to the ligaments, and provide objective gap data for procedure planning and execution.A small clinical case series showed the CORI Digital Tensioner reduced variability of tensioning by 64% when compared to a manual technique.

Advancing procedural innovation in robotic-assisted surgery, the CORI Digital Tensioner is a differentiated technology that helps solve challenges for surgeons, including:

  • The first and only ligament tensioning device in robotic-assisted surgery to assess joint laxity in the native knee before performing bony resection.
  • Automatic collection of gap data at a specified force through the full range of movement.
  • A true tensioning device using a software interface that allows surgeons to choose their preferred target force value (50±10N, 100±10N, or 150±10N).

To learn more about the latest advancements in orthopaedic reconstruction and discover more about robotics and computer-guided solutions, please go to