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Lunate morphology.

Ajay Gupta1, Nawal M Al-Moosawi

  • 1Armed Forces Hospital, P.O. Box 454, 13005 Safat, Kuwait. drajaygupta@hotmail.com

Journal of Biomechanics
|November 5, 2002
PubMed
Summary
This summary is machine-generated.

This study established normal wrist lunate dimensions using CT scans. Lunate shape classification on CT was complex, but capitate axis measurement correlated with the radio-lunate angle.

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Area of Science:

  • Radiology
  • Anatomy
  • Orthopedics

Background:

  • The lunate bone's shape is crucial for wrist biomechanics.
  • Previous classifications based on plain radiographs have limitations.
  • Accurate lunate morphology data is needed for clinical applications.

Purpose of the Study:

  • To create a normal database of lunate shape and size using CT.
  • To evaluate the CT-based classification of lunate morphology.
  • To investigate correlations between lunate shape and wrist angles.

Main Methods:

  • Computed Tomography (CT) examination of the wrist joint in 50 healthy volunteers.
  • Measurement of various lunate parameters on reformatted sagittal, coronal, and axial images.
  • Analysis of lunate shape, articular surface axes, and axial index.

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Main Results:

  • Established mean diameters for lunate antero-dorsal (16.96mm) and medio-lateral (12.80mm) dimensions.
  • CT measurements often failed to consistently classify lunates into previously described radiographic shapes.
  • A significant correlation was found between the capitate axis measurement and the radio-lunate angle (p<0.001).

Conclusions:

  • CT provides detailed lunate morphology but complicates traditional shape classification.
  • The radio-lunate angle shows significant correlation with lunate shape relative to the capitate's axis.
  • This data contributes to a better understanding of normal wrist anatomy and biomechanics.