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Related Experiment Videos

Three dimensional shape measurement system for residual ridges.

T Morimitsu1, T Nokubi, T Ono

  • 1Second Department of Prosthetic Dentistry, Osaka University Faculty of Dentistry, Japan.

The Journal of Osaka University Dental School
|December 1, 1992
PubMed
Summary

This study introduces a new shape measurement system for residual ridges in edentulous patients. The laser-based system achieves high accuracy, crucial for designing complete dentures.

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Area of Science:

  • Biomedical Engineering
  • Dental Prosthetics
  • Measurement Science

Background:

  • Accurate evaluation of residual ridges is essential for complete denture design in edentulous patients.
  • Existing methods may lack the precision required for objective assessment.
  • Developing advanced measurement systems can improve prosthetic outcomes.

Purpose of the Study:

  • To describe a novel shape measurement system for residual ridges.
  • To evaluate the accuracy of this newly developed system.
  • To assess the system's performance in simulating residual ridge shapes.

Main Methods:

  • The system utilizes a high-precision laser displacement meter, a controlled moving table, and a personal computer.
  • Plaster models simulating residual ridges were placed on a working table moving at 0.7 mm/sec.

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  • Height measurements were taken intermittently at a frequency of 7 points/sec.

    • Main Results:

    • The developed shape measurement system demonstrated a measurement error of 2.5%.
    • This level of accuracy is considered highly reliable for residual ridge assessment.
    • Measurement accuracy was found to decrease with darker plaster model colors.

    Conclusions:

    • The described shape measurement system offers a precise and objective method for evaluating residual ridges.
    • The system's high accuracy supports its application in the design and construction of complete dentures.
    • Further research may explore optimizing performance with different model materials or colors.