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Computer-assisted bone segment navigation.

R Marmulla1, H Niederdellmann

  • 1Department of Cranio-Maxillofacial Surgery, University of Regensburg, Germany. marmulla@rkmkgnwl.ngate.uni-regensburg.de

Journal of Cranio-Maxillo-Facial Surgery : Official Publication of the European Association for Cranio-Maxillo-Facial Surgery
|February 26, 1999
PubMed
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Computer-assisted bone segment navigation precisely positions bone segments using the Surgical Segment Navigator (SSN). This innovative system achieves high accuracy (1 mm or better) without registration markers, reducing CT scans and operations.

Area of Science:

  • * Medical Engineering
  • * Orthopedic Surgery
  • * Computer-Assisted Surgery

Background:

  • * Computer-assisted bone segment navigation enables precise 3-D positioning of skeletal segments.
  • * Current methods require registration markers, increasing CT scans and operative time.
  • * A need exists for a high-precision navigation system with reduced imaging requirements.

Purpose of the Study:

  • * To introduce the Surgical Segment Navigator (SSN), a novel system for computer-assisted bone segment navigation.
  • * To evaluate the SSN's ability to achieve high-precision positioning (1 mm or better).
  • * To assess the SSN's feasibility using plain computed tomography (CT) without pre-operative registration markers.

Main Methods:

  • * Development of the Surgical Segment Navigator (SSN) at the University of Regensburg with Carl Zeiss support.

Related Experiment Videos

  • * Utilizes an infrared positioning device connected to a workstation.
  • * Employs templates fixed to bone segments with osteosynthesis screws and a surface-pattern for intraoperative correlation.

    • Main Results:

    • * The SSN is the first system to meet the criteria for markerless, high-precision bone segment navigation.
    • * Achieved precision of 1 mm or better in evaluations.
    • * Clinically applied and precision validated in human cadaver studies.

    Conclusions:

    • * The SSN system offers a significant advancement in computer-assisted orthopedic surgery.
    • * It enables accurate bone segment navigation with reduced imaging and procedural steps.
    • * The system holds promise for improving surgical planning and execution in osteotomy and fracture management.