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Morphometric Study of the Atlas.

Narcelio Mendes Ferreira Filho1, Ricardo Arantes1, Anderson Luis do Nascimento1

  • 1Departamento de Biomecânica, Medicina e Reabilitação do Aparelho Locomotor, Hospital das Clínicas, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil.

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|March 4, 2020
PubMed
Summary
This summary is machine-generated.

This study measured atlas (C1) anatomical parameters in Brazilians, finding them similar to other populations but with notable sex-based differences. These findings may refine upper cervical spine implant indications.

Keywords:
anatomyatlascervical spinecomputed tomography

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Area of Science:

  • Orthopedics
  • Neurosurgery
  • Radiology

Background:

  • The atlas (C1) is crucial for upper cervical spine stability.
  • Accurate anatomical knowledge of the C1 vertebra is essential for surgical implant selection and placement.
  • Variations in C1 anatomy across different populations can impact surgical outcomes.

Purpose of the Study:

  • To determine the anatomical parameters of the atlas (C1) in a Brazilian population.
  • To compare these parameters with existing literature from other populations.
  • To inform and potentially revise implant indications for upper cervical spine surgery.

Main Methods:

  • Retrospective observational study of 100 patients.
  • Analysis of axial and sagittal computed tomography (CT) scans.
  • Measurement of key parameters including screw entry points, safety angles, screw lengths, and posterior arch thickness, stratified by age, gender, and side.

Main Results:

  • Atlas anatomical parameters in the Brazilian sample were comparable to international data.
  • Significant differences in certain parameters were observed between males and females.
  • Specific measurements for screw entry points, safety angles, and posterior arch thickness were quantified.

Conclusions:

  • The anatomical parameters of the atlas in the studied Brazilian population align with existing literature.
  • Sex-based differences in atlas anatomy were identified, suggesting potential implications for surgical approaches.
  • Further research may refine implant selection for C1 stabilization based on these findings.