Accuracy of a freehand sculpting tool for unicondylar knee replacement

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19 Citations (Scopus)

Abstract

Unicondylar knee replacement is technically challenging and malalignment of the implant results in high failure rates. Surgical robotics with navigation is a potential solution.

The accuracy of performing unicondylar knee replacement using a freehand sculpting, semi active robotic tool was investigated using twenty synthetic femur and tibia. The resultant cut surface was compared to the intra operative planned surface. Resultant femoral and tibial implant placement was compared to the planned implant position.

The maximum overcut or undercut was 2.5mm. The mean femoral and tibial surfaces showed a slight undercut (0.14mm and 0.20mm). The maximum rotational error was 3.2o and RMS angular error was 1.46o across all orientations. The maximum translational error was 1.18mm and the RMS translational error across all directions was 0.61mm.

The tool produced accurate implant placement with small errors comparable to those reported by other robotic assistive devices on the market.
LanguageEnglish
Pages162-169
Number of pages8
JournalInternational Journal of Medical Robotics and Computer Assisted Surgery
Volume10
Issue number2
Early online date11 Aug 2013
DOIs
Publication statusPublished - Jun 2014

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Knee prostheses
Knee Replacement Arthroplasties
Robotics
Thigh
Self-Help Devices
Tibia
Femur
Navigation

Keywords

  • freehand sculpting
  • unicondylar knee replacement
  • sculpting tools

Cite this

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abstract = "Unicondylar knee replacement is technically challenging and malalignment of the implant results in high failure rates. Surgical robotics with navigation is a potential solution.The accuracy of performing unicondylar knee replacement using a freehand sculpting, semi active robotic tool was investigated using twenty synthetic femur and tibia. The resultant cut surface was compared to the intra operative planned surface. Resultant femoral and tibial implant placement was compared to the planned implant position. The maximum overcut or undercut was 2.5mm. The mean femoral and tibial surfaces showed a slight undercut (0.14mm and 0.20mm). The maximum rotational error was 3.2o and RMS angular error was 1.46o across all orientations. The maximum translational error was 1.18mm and the RMS translational error across all directions was 0.61mm. The tool produced accurate implant placement with small errors comparable to those reported by other robotic assistive devices on the market.",
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