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Related Concept Videos

Sutures of the Skull01:22

Sutures of the Skull

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The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
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Cranial Bones: Lateral View01:27

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The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
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Three-dimensional cranial suture morphometric changes in young rats during normal growth.

Tsolmonbaatar Khurelbaatar1, Leah Fisher1, Lindsey Westover2

  • 1Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada.

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|November 22, 2024
PubMed
Summary

This study introduces a new 3D method to quantitatively analyze age-related changes in rat coronal sutures. The novel curved-reslicing approach accurately tracks morphometric changes, revealing significant increases in interdigitation and decreases in width with age.

Keywords:
Computed tomographyCranial sutureGrowthLinear interdigitation indexMorphology

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Area of Science:

  • Craniofacial development
  • Biomedical imaging
  • Quantitative morphology

Background:

  • Age-based morphometric changes in cranial sutures are not well-established quantitatively.
  • Previous methods using planar reslicing had limitations in capturing true skull shape and suture length.
  • Accurate 3D morphometric analysis of sutures is crucial for understanding normal growth and potential abnormalities.

Purpose of the Study:

  • To investigate age-based morphometric changes of the coronal suture in young rats.
  • To introduce and validate a novel curved-reslicing approach for 3D suture analysis.
  • To establish predictive models for suture morphometric changes during growth.

Main Methods:

  • Longitudinal in vivo micro-computed tomography (μCT) scans of 12 Sprague-Dawley rats at five age points (7-21 weeks).
  • Application of a novel curved-reslicing technique to generate 3D cross-sectional suture data.
  • Measurement of suture linear interdigitation index (LII) and width using a marching algorithm and linear mixed-effect models (LMM).

Main Results:

  • Coronal suture LII increased by 15.3% and width decreased by 53.5% from 7 to 21 weeks (p < 0.01).
  • Statistically significant age-based differences in LII and width were confirmed.
  • LMM explained up to 97% of LII variation and 78% of width variation, considering random effects.

Conclusions:

  • A novel curved-reslicing method provides accurate 3D quantitative data for cranial sutures.
  • The study successfully demonstrated age-based morphometric changes in rat coronal sutures.
  • This methodology offers a powerful tool for future research on craniofacial suture abnormalities.