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Related Experiment Video

Updated: Feb 22, 2026

Author Spotlight: 3D Movement Assessment of Maxillary Posterior Teeth in Clear Aligner Treatment
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Measuring system for an attitude angle of a denture using an Inertial Measurement Unit.

Toshiaki Sekita1, Syuhei Takeuchi1, Syunsuke Minakuchi1

  • 1Gerodontology and Oral Rehabilitation, Division of Gerontology and Gerodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.

Journal of Prosthodontic Research
|September 21, 2017
PubMed
Summary

This study developed a reliable system using an inertial measurement unit (IMU) to measure denture movement. The system accurately captures 3-D denture attitude angles during function, aiding in quality evaluation.

Keywords:
A complementary filterAttitude angle: Inertial Measurement UnitDenture movements

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Area of Science:

  • Biomedical Engineering
  • Dental Mechanics
  • Biomechanics

Background:

  • Accurate measurement of denture movement is crucial for assessing fit and function.
  • Existing methods for capturing 3-D denture motion can be complex and time-consuming.

Purpose of the Study:

  • To develop and validate a novel measuring system for analyzing the three-dimensional (3-D) attitude angles of dentures during function.
  • To assess the reliability and accuracy of this new system for clinical application.

Main Methods:

  • A sensor-based system utilizing an inertial measurement unit (IMU) was assembled and calibrated using a rotary table with controlled rotations (1.2° and 2.4°).
  • A pilot clinical trial involved measuring the attitude angles of three subjects' upper complete dentures during a tapping function.

Main Results:

  • The system demonstrated high measurement accuracy, comparable to 3-D motion capture systems.
  • Significant differences in pitch, roll, and yaw angles were observed between subjects and denture stability/maxillary ridge types.
  • The system effectively quantified variations in denture movement, correlating with stability and ridge morphology.

Conclusions:

  • The developed IMU-based measuring system is reliable and user-friendly for analyzing denture attitude angles during function.
  • This system shows potential as a diagnostic tool for evaluating denture quality and fit.
  • The findings highlight the system's utility in objective assessment of denture performance.