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Cartesian three-dimensional method to quantify displacements between cone beam computed tomography models.

Caroline Pelagio Maués Casagrande1, Marcus Vinicius Sena Casagrande2, Andressa Otranto de Brito Teixeira1

  • 1Universidade do Estado do Rio de Janeiro, Faculdade de Odontologia (Rio de Janeiro/RJ, Brazil).

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Summary
This summary is machine-generated.

This study introduces a reliable method for tracking 3D object displacements, crucial for evaluating orthodontic and oral surgery treatments. The new technique accurately measures bone segment movements with minimal error.

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Area of Science:

  • Orthodontics and Oral Surgery
  • Medical Imaging
  • Biomechanical Engineering

Background:

  • Current three-dimensional (3D) models for treatment evaluation in orthodontics and oral surgery have limitations.
  • Displacement color map techniques are commonly used but have significant drawbacks.

Purpose of the Study:

  • To propose and validate a novel method for tracking translational movements of 3D objects.
  • To evaluate displacements in surfaces without shape modification, overcoming limitations of existing techniques.

Main Methods:

  • Cone Beam Computed Tomography (CBCT) data from ten patients were utilized.
  • A virtual surgical plan was simulated and analyzed using the proposed tracking method.
  • High-quality STL models were generated using ITK-Snap software, with centroid points automatically analyzed.

Main Results:

  • The method demonstrated excellent inter-examiner and intra-examiner reliability.
  • Mean displacement measurement error was consistently below 0.1mm.
  • Statistical analysis (paired t-test) revealed no significant differences, confirming accuracy.

Conclusions:

  • The developed method reliably tracks simulated translational displacements of bone segments.
  • This technique offers a promising advancement for quantitative analysis in surgical planning and outcome assessment.