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Related Experiment Videos

Scaphoid anatomy: evaluation with complex motion tomography.

D K Smith1, R L Linscheid, P C Amadio

  • 1Department of Orthopedics, Mayo Clinic, Rochester, MN 55905.

Radiology
|October 1, 1989
PubMed
Summary
This summary is machine-generated.

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This study establishes normal scaphoid bone alignment using complex motion tomography. These findings provide a baseline for evaluating scaphoid fractures and malunions.

Area of Science:

  • Orthopedics
  • Radiology
  • Anatomy

Background:

  • Scaphoid fractures are common wrist injuries.
  • Assessing scaphoid alignment is crucial for diagnosing and treating fractures and malunions.
  • Standardized measurements of normal scaphoid orientation are needed.

Purpose of the Study:

  • To determine the normal orientation of the proximal and distal scaphoid poles using complex motion tomography.
  • To establish reference values for scaphoid axis angulation in normal wrists.
  • To provide a basis for comparison with displaced or malunited scaphoid fractures.

Main Methods:

  • Complex motion tomography was performed on 10 normal wrists.
  • Two standardized measurement techniques were used to evaluate biplanar tomograms.

Related Experiment Videos

  • Measurements included angulation between reference planes (volar/dorsal cortical surfaces) and axes (articular surfaces) in sagittal and coronal views.

    • Main Results:

    • Technique 1 (cortical surfaces): Average angulation was 32°±5° (sagittal) and 40°±3° (coronal).
    • Technique 2 (articular surfaces): Average angulation was 24°±5° (sagittal) and 40°±4° (coronal).
    • Both techniques demonstrated consistent coronal plane angulation.

    Conclusions:

    • Complex motion tomography can reliably assess normal scaphoid bone orientation.
    • Established normal ranges provide a reference for evaluating scaphoid fracture displacement and malunion.
    • These measurements are valuable for orthopedic and radiological assessments of wrist injuries.