Evaluating Flexure of the Mandible on Opening as Captured by Intraoral Scanners

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  • March 19, 2019
Creator
  • Rich, Josiah
    • Affiliation: School of Dentistry, Department of Orthodontics
Abstract
  • Aims: The mandible flexes on opening, constricting the width in the transverse dimension. Digital intraoral scanners require the patients’ mandible to approach maximum opening during capture. This study compares positional changes of teeth as captured by intraoral scans, alginate impressions, and Cone Beam Computed Tomography (CBCT). Methods: Thirty subjects had alginate impressions, intraoral scans and CBCT scans taken. Digital surface models (STL) were generated for each method, superimposed and total mean surface errors of the teeth were calculated. Results: The mean error was greatest at the molars. Error of open alginate to CBCT scan was 0.440mm±0.146, closed alginate to CBCT was 0.428mm±0.124, and intraoral scan to CBCT was 0.337mm±0.154 all at the molar region. Intraoral scans captured less mandibular flexure than alginate impressions and can be used for any purpose previously done with alginate.
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  • In Copyright
Advisor
  • Nguyen, Tung
  • Tyndall, Donald
  • Jackson, Tate
Degree
  • Master of Science
Degree granting institution
  • University of North Carolina at Chapel Hill Graduate School
Graduation year
  • 2017
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