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Assessment technique for computer-aided manufactured sockets.

Joan E Sanders1, Michael R Severance

  • 1Department of Bioengineering, University of Washington, Seattle, 98195, USA. jsanders@u.washington.edu

Journal of Rehabilitation Research and Development
|September 23, 2011
PubMed
Summary
This summary is machine-generated.

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This study introduces a new method to assess prosthetic socket manufacturing quality. It uses 3D shape comparisons to identify errors in computer-aided fabrication processes.

Area of Science:

  • Prosthetics and Orthotics
  • Biomedical Engineering
  • Manufacturing Quality Control

Background:

  • Computer-aided manufacturing (CAM) is increasingly used for prosthetic socket fabrication.
  • Ensuring the quality and accuracy of CAM processes is crucial for patient outcomes.
  • Existing methods for assessing socket fabrication quality may be insufficient.

Purpose of the Study:

  • To present a novel assessment technique for evaluating prosthetic socket fabrication quality in CAM facilities.
  • To provide a tool for manufacturers and equipment marketers to improve product quality.
  • To identify and pinpoint sources of error in the fabrication process.

Main Methods:

  • Fabrication of test models and sockets using the CAM suite under evaluation.

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  • Measurement of fabricated shapes using scanning equipment.
  • Comparison of scanned socket shapes with electronic design files (e-files) and model shapes.

    • Main Results:

    • The technique quantifies overall socket quality by comparing final socket shapes to e-file designs.
    • Carving performance is assessed by comparing model shapes to e-file shapes.
    • Forming performance is evaluated by comparing socket shapes to model shapes.
    • Mean Radial Error (MRE) and Interquartile Range (IQR) are used to assess sizing and regional shape quality, respectively.
    • Separating MRE and IQR for carving and forming helps pinpoint error sources.

    Conclusions:

    • The developed assessment technique offers a valuable tool for the prosthetics community and industry.
    • It aids in identifying problems and limitations within CAM processes.
    • The technique provides insights for appropriate modifications to improve prosthetic socket fabrication.