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Related Experiment Video

Updated: May 16, 2026

Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
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Pierre Robin sequence and Treacher Collins hypoplastic mandible comparison using three-dimensional morphometric

Michael T Chung1, Benjamin Levi, Jeong S Hyun

  • 1Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Plastic and Reconstructive Surgery Division, Stanford University School of Medicine, Stanford, CA 94305, USA

The Journal of Craniofacial Surgery
|November 17, 2012
PubMed
Summary

Pierre Robin sequence and Treacher Collins syndrome both cause mandibular hypoplasia, but affect jaw shape differently. This study reveals distinct patterns in mandibular morphology, crucial for surgical planning.

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Area of Science:

  • Craniofacial surgery
  • Pediatric genetics
  • Medical imaging

Background:

  • Pierre Robin sequence (PRS) and Treacher Collins syndrome (TCS) are congenital conditions often presenting with mandibular hypoplasia.
  • Previous hypotheses suggested differential mandibular involvement in PRS versus TCS, but this lacked detailed morphometric validation.

Purpose of the Study:

  • To compare detailed mandibular morphology in children with PRS and TCS using 3D computed tomography (CT) analysis.
  • To identify distinct patterns of mandibular hypoplasia in PRS and TCS.

Main Methods:

  • Retrospective analysis of CT scans from children diagnosed with PRS or TCS.
  • 3D reconstruction of mandibles to measure ramus height, mandibular body length, and gonial angle.
  • Comparison of measurements against age- and sex-matched controls and published clinical norms.

Main Results:

  • Children with PRS exhibited significantly shorter mandibular body length.
  • Children with TCS showed significantly shorter ramus height.
  • Both PRS and TCS groups displayed more obtuse gonial angles compared to controls, with distinct ramus height-to-body length ratios.

Conclusions:

  • 3D morphometric analysis reveals distinct patterns of mandibular hypoplasia in PRS and TCS.
  • These findings highlight the need for tailored surgical planning in reconstructive procedures for each condition.