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A laser instrument for measuring tooth movements.

H Rydén, H Bjelkhagen, U Sandström

    Journal of Periodontology
    |May 1, 1979
    PubMed
    Summary
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    A new non-contact laser reflection apparatus accurately measures tooth movement. This dental instrument achieves high precision, with patient repositioning accurate to +/- 20 microns and measurements down to 50 microns.

    Area of Science:

    • Biomedical Engineering
    • Dental Technology
    • Optical Measurement Systems

    Background:

    • Accurate measurement of tooth movement is crucial for orthodontic diagnosis and treatment monitoring.
    • Existing methods for measuring tooth displacement may lack precision or require physical contact.
    • Developing non-contact, high-accuracy techniques is essential for advancing dental diagnostics.

    Purpose of the Study:

    • To introduce and evaluate an improved apparatus for non-contact measurement of tooth movement.
    • To assess the feasibility of clinical investigations using this novel laser reflection equipment.
    • To determine the accuracy and reliability of the developed measurement system.

    Main Methods:

    • Construction of an improved apparatus based on the laser reflection method.

    Related Experiment Videos

  • Testing of individual components to evaluate clinical investigation possibilities.
  • Assessment of patient repositioning accuracy and system stability over time.

    • Main Results:

    • The apparatus enables highly accurate, direct, non-contact measurement of tooth movement.
    • Patient repositioning was achieved with an accuracy of +/- 20 microns.
    • The laser reflection pattern remained consistent over a 3-month experimental period.
    • The instrument demonstrated measurement capabilities down to 50 microns.

    Conclusions:

    • The developed laser reflection apparatus offers a precise and reliable method for measuring tooth movement.
    • The system's accuracy and stability support its potential for clinical dental investigations.
    • This non-contact technology represents a significant advancement in dental measurement tools.