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Objectifying Micrognathia Using Three-Dimensional Photogrammetric Analysis.

Hanneke Basart1,2, Michael Suttie3, Amel Ibrahim4

  • 1Department of Plastic and Reconstructive Surgery.

The Journal of Craniofacial Surgery
|October 16, 2018
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Summary
This summary is machine-generated.

Three-dimensional (3D) facial photogrammetry offers a noninvasive method to accurately measure mandible size and growth in infants with micrognathia, correlating well with CT scans.

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Area of Science:

  • Craniofacial surgery
  • Medical imaging
  • Pediatric diagnostics

Background:

  • Micrognathia, often seen in Robin sequence (RS), requires objective measurement for assessing severity and treatment outcomes.
  • Current methods for measuring mandible size and growth lack standardization and objectivity.
  • 3D facial photogrammetry presents a novel, noninvasive approach for evaluating micrognathia.

Purpose of the Study:

  • To investigate the utility of 3D facial photogrammetry for estimating mandible size and growth in newborns and infants.
  • To compare 3D photogrammetry measurements with traditional computed tomography (CT) imaging.
  • To assess the potential of 3D photogrammetry as a clinical tool for micrognathia assessment.

Main Methods:

  • Exterior mandibular volume was calculated using a tetrahedron model based on 4 facial landmarks from 3D photogrammetry images.
  • Mandibular growth was prospectively assessed in 3 patients with RS over their first year of life.
  • Interior mandibular volume was estimated using CT scans and compared with exterior volume measurements from 3D photogrammetry in 10 patients.

Main Results:

  • 3D facial photogrammetry successfully estimated exterior mandibular volume in all patients.
  • 3D facial photogrammetry visualized facial dysmorphism, revealing patterns related to specific etiologies.
  • A high correlation (0.8789) was found between mandibular volumes measured by 3D photogrammetry and CT imaging.

Conclusions:

  • 3D facial photogrammetry effectively delineates facial characteristics in syndromes associated with micrognathia.
  • This noninvasive technique objectively estimates mandibular volume and growth, showing excellent agreement with bony measurements.
  • 3D facial photogrammetry is a promising, clinically viable tool for quantifying micrognathia.