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Characterizing Mandibular Morphology in Robin Sequence-A 3D Statistical Shape Analysis.

Khalid El Ghoul1, Eimear O' Sullivan2, Praveen Kumar Guntaka3

  • 1Department of Oral and Maxillofacial Surgery, Erasmus Medical Centre, Rotterdam, The Netherlands.

The Journal of Craniofacial Surgery
|April 5, 2025
PubMed
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This summary is machine-generated.

Robin sequence (RS) patients exhibit distinct 3D mandibular morphology, characterized by shorter condylar necks and mandibular bodies compared to controls. These differences persist with age, suggesting a consistent developmental abnormality.

Area of Science:

  • Craniofacial morphology
  • Pediatric imaging
  • Congenital anomalies

Background:

  • Robin sequence (RS) is a congenital condition involving micrognathia, glossoptosis, and airway obstruction.
  • Assessing micrognathia in RS is often subjective.
  • This study investigates 3D mandibular morphology in RS patients.

Purpose of the Study:

  • To describe 3D mandibular morphology in Robin sequence patients.
  • To analyze age-related mandibular shape variations in RS.
  • To compare RS mandibular morphology with age-matched controls.

Main Methods:

  • 3D mandibular reconstructions from CT scans of isolated (iRS) and non-isolated (niRS) patients.
  • Principal Component Analysis for shape variation analysis.
Keywords:
3DRobin sequencemandibular morphologymicrognathiashape analysis

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  • Partial Least Squares and MANOVA for group comparisons.

    • Main Results:

    • Both iRS and niRS mandibles showed shorter condylar necks and bodies, and less pronounced symphyseal projection compared to controls.
    • Age-related shape changes in RS mandibles differed from controls, indicating persistent dysmorphology.
    • Allometric shape changes significantly influenced mandibular morphology variation in RS patients.

    Conclusions:

    • Robin sequence patients present unique 3D mandibular morphology.
    • Observed age-related shape differences suggest persistent dysmorphology in iRS and niRS.
    • Further research will link mandibular morphology to clinical factors.