Article Text

State of the Art
New and evolving technologies for knee arthroplasty—computer navigation and robotics: state of the art
  1. Francisco Figueroa1,2,
  2. David Parker3,
  3. Brett Fritsch3,
  4. Sam Oussedik4
  1. 1 Orthopaedic Surgery, Hospital Sotero del Rio, Santiago, Chile
  2. 2 Orthopaedic Surgery, Clinica Alemana - Universidad del Desarrollo, Santiago, Chile
  3. 3 Orthopaedic Surgery, Sydney Orthopaedic Research Institute, Sydney, New South Wales, Australia
  4. 4 Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, London, UK
  1. Correspondence to Dr Francisco Figueroa, Hospital Sotero del Rio, Santiago, Chile; franciscofigueroab{at}


Computer-assisted navigation was introduced as an adjunct to total knee arthroplasty (TKA) with the potential of improving positioning and alignment of TKA implants. Computer-assisted surgery (CAS) can be divided into: passive (navigated TKA) or semiactive and active (robotic TKA). Passive CAS has shown improved results regarding alignment in TKA compared with conventional instrumentation but it has several possible complications such as registration errors, pin site complications, increased surgical time and a potentially longer learning curve. Robotic TKA has been developed to eliminate the possible error in the preparation of bone surfaces by the surgeon. There is still little evidence on these systems but the early results are encouraging. Despite better results in accuracy with both CAS systems, clinical benefits are still subject of debate. Additional research is required to fully define the costs and benefits of robotics in regular medical practice.

  • knee
  • arthroplasty
  • total joint replacement

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  • Contributors FF: writing process. DP and SO: reviewing and editing process. BF: writing, reviewing and editing process.

  • Competing interests None declared.

  • Patient consent Obtained.

  • Provenance and peer review Commissioned; externally peer reviewed.

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