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Primary and revision total hip replacement using the Robodoc system

W L Bargar1, A Bauer, M Börner

  • 1Department of Orthopaedics, University of California, Davis School of Medicine, Sutter General Hospital, Sacramento 95816, USA.

Clinical Orthopaedics and Related Research
|October 2, 1998
PubMed
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The ROBODOC system, a robotic arm for cementless total hip replacement, shows improved femoral component fit and positioning. It also eliminates intraoperative femoral fractures, demonstrating safety and effectiveness in clinical use.

Area of Science:

  • Orthopedic Surgery
  • Robotics in Medicine
  • Medical Device Technology

Background:

  • Human errors can impact cementless total hip replacement outcomes.
  • The ROBODOC system integrates preoperative planning (ORTHODOC) with a robotic arm for enhanced surgical precision.

Purpose of the Study:

  • To evaluate the safety and effectiveness of the ROBODOC system in cementless total hip replacement.
  • To compare ROBODOC-assisted procedures with conventional techniques regarding clinical outcomes, surgical parameters, and complications.

Main Methods:

  • A randomized controlled trial in the US (136 hip replacements) and postmarket surveillance in Germany (900 hip replacements).
  • Data collection included clinical scores (Harris hip score, SF-36), surgical time, blood loss, length of stay, and radiographic assessments.

Related Experiment Videos

  • Radiographs were evaluated for femoral component fit and positioning by an independent radiologist.

    • Main Results:

    • No significant differences in Harris hip scores or SF-36 outcomes between ROBODOC and control groups in the US study.
    • Increased surgical time and blood loss in the ROBODOC group initially, attributed to a learning curve.
    • Statistically superior fit and positioning of the femoral component in the ROBODOC group.
    • Elimination of intraoperative femoral fractures in the ROBODOC group (0/787) compared to the control group (3/62) in the US study.
    • Significant improvement in Harris hip scores and reduction in surgical time in the German study.

    Conclusions:

    • The ROBODOC system is safe and effective for cementless total hip replacement.
    • It provides radiographically superior implant fit and positioning.
    • The system effectively eliminates intraoperative femoral fractures, a significant complication in conventional hip replacement surgery.