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Measurement of Dynamic Scapular Kinematics Using an Acromion Marker Cluster to Minimize Skin Movement Artifact
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Sex differences in photon-counting detector computed tomography-derived scaphotrapeziotrapezoid joint morphometrics
Taylor P Trentadue1,2,3, Andrew Thoreson1, Cesar Lopez1
1Assistive and Restorative Technology Laboratory, Mayo Clinic, 200 First St. SW, Rochester, MN, 55905, USA.
Skeletal Radiology
|February 5, 2025
Summary
Sex differences exist in scaphotrapeziotrapezoid (STT) joint morphology. Females have smaller trapeziotrapezoid joint areas and closer bone proximity, impacting wrist and thumb biomechanics.
Area of Science:
- Orthopedic surgery
- Radiology
- Biomechanics
Background:
- The scaphotrapeziotrapezoid (STT) joint is crucial for wrist and thumb function.
- Diagnostic attention for the STT joint is less than for adjacent joints.
- CT-derived 3D models allow quantification of articular morphometrics.
Purpose of the Study:
- To investigate sex-based differences in STT joint articular surface areas.
- To analyze sex-based differences in interosseous proximities within the STT joint.
- To determine if carpal bone positions differ between sexes.
Main Methods:
- 30 participants (50% female) underwent CT scans for normative wrist imaging.
- Carpal bones were segmented and meshed to calculate kinematic parameters.
- Articular surface areas and interosseous proximity distributions were quantified and compared between sexes.
Main Results:
- Females exhibited significantly smaller trapeziotrapezoid articular surface areas compared to males.
- Interosseous proximity distributions were closer in females across all STT joint articulations.
- Distal carpal bones showed greater dorsal translation in females.
Conclusions:
- This study provides quantitative data on sex-stratified morphological variations at the STT joint.
- Interosseous proximity distributions can aid in interpreting STT joint space on imaging.
- Findings offer reference ranges for STT arthrokinematics research.
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