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Related Experiment Video

Updated: Jan 21, 2026

Precision of In Vivo Quantitative Tooth Wear Measurement Using Intra-Oral Scans
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Quantitative tooth mobility evaluation based on intraoral scanner measurements.

Luiz Meirelles1, Rafael Siqueira2, Carlos Garaicoa-Pazmino3

  • 1Department of Restorative and Prosthetic Dentistry, College of Dentistry, Ohio State University, Columbus, OH.

Journal of Periodontology
|August 6, 2019
PubMed
Summary

This study introduces a new method for measuring tooth mobility using intraoral scanners. The technique proved reliable in an in vitro setting, offering a more objective way to assess dental conditions.

Keywords:
periodontal diseaseprecision medicinequantitative evaluationreliability of resultstooth mobility

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Area of Science:

  • Dentistry
  • Biomedical Engineering
  • Periodontology

Background:

  • Current tooth mobility assessment is subjective, relying on examiner perception.
  • Existing methods convert continuous mobility data into categorical variables.
  • There is a need for more objective and reliable tooth mobility assessment techniques.

Purpose of the Study:

  • To evaluate the reliability of a novel technique for assessing tooth mobility.
  • To introduce an objective measurement method for tooth mobility.
  • To compare the novel technique's performance against established assessment criteria.

Main Methods:

  • Three periodontists assessed tooth mobility (M1-M2) in a typodont model.
  • Intraoral scanners captured tooth position data.
  • Mobility was quantified using metrology software, analyzing linear deviations (x, y, z) at cervical, middle, and occlusal regions.
  • Reliability was assessed using intraclass-correlation coefficient, Cronbach's alpha, and t-tests.

Main Results:

  • The novel technique demonstrated excellent reliability (Cronbach alpha >0.9) across x-y-z axes for both mobility levels.
  • High inter-examiner consistency was observed, with minor exceptions.
  • Significant differences in mobility were detected between M1 and M2 across all axes and reference points.
  • Proportional changes in mobility were consistent across cervical, middle, and occlusal regions.

Conclusions:

  • A novel intraoral scanner-based technique provides reliable tooth mobility data.
  • This in vitro study validates the technique's potential for objective tooth mobility assessment.
  • The method offers a promising advancement over subjective clinical assessments.