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Related Experiment Video

Updated: Jun 24, 2026

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
07:32

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

Published on: February 23, 2024

Measuring 3-dimensional tooth movement with a 3-dimensional surface laser scanner.

Badri Thiruvenkatachari1, Mariam Al-Abdallah, Noreen C Akram

  • 1School of Dentistry, University of Manchester, Manchester, United Kingdom. badri_chari@yahoo.com

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|April 14, 2009
PubMed
Summary

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A new three-dimensional (3D) laser scanner accurately measures tooth movement, offering a reliable alternative to traditional cephalometric radiographs for orthodontic analysis.

Area of Science:

  • Orthodontics
  • Dental Technology
  • Biomedical Engineering

Background:

  • Accurate measurement of tooth movement is crucial in orthodontics.
  • Traditional methods like cephalometric radiography have limitations.
  • Developing advanced 3D measurement techniques is essential for precise analysis.

Purpose of the Study:

  • To develop and validate a three-dimensional (3D) laser scanning method for measuring tooth displacement.
  • To assess the accuracy and reliability of the 3D laser scanner.
  • To compare 3D laser scanner measurements with those obtained from cephalometric radiographs.

Main Methods:

  • A 3D surface laser scanner was employed to measure tooth movement.
  • Superimposition on palatal rugae was used for aligning pretreatment and posttreatment models.

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  • Measurements were taken from a prospective longitudinal randomized clinical trial.
  • Accuracy was evaluated using an experimental model and compared with cephalometric radiographs.

    • Main Results:

    • The 3D laser scanner demonstrated high accuracy, with precision of 0.0235 mm (anteroposterior) and 0.0071 mm (buccolingual).
    • Analysis revealed mesial molar movements ranging from 1.11 to 2.24 mm, with no significant differences between implant and headgear anchorage groups.
    • Vertical and transverse tooth movements also showed no statistically significant differences between the groups.
    • Scanner results closely mirrored those from cephalometric radiograph superimposition.

    Conclusions:

    • The developed 3D laser scanner provides accurate and reliable measurements of tooth displacement.
    • This technology offers a viable and potentially superior alternative to conventional cephalometric radiography in orthodontic assessments.
    • 3D laser scanning enhances the precision of quantifying orthodontic tooth movement.