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Anatomy of Hamate Articular Surface
Annelise Chaparro1, Christian Shigley1, Jerry Huang1
1University of Washington, Seattle, WA.
Journal of Hand Surgery Global Online
|March 19, 2026
Summary
The distal hamate
Area of Science:
- Orthopedic anatomy
- Radiographic analysis
- Surgical planning
Background:
- The distal hamate's articular anatomy is crucial for wrist function.
- Understanding variations in features like central ridge angles (CRAs) and radii of curvature is important for surgical interventions.
Purpose of the Study:
- To investigate the variability of distal hamate articular anatomy.
- Specifically focusing on central ridge angles (CRAs) and radii of curvature.
Main Methods:
- 118 wrist CT scans (63 male, 55 female) were analyzed.
- Visage software measured distal hamate articular surface width, CRA, and facet radii of curvature.
- Incidence of convex vs. concave facets was assessed.
Main Results:
- Significant variability was found in all measured parameters.
- Mean coronal articular width was 14.8 mm; mean CRA was 155°.
- The fifth metacarpal facet was convex in over 50% of cases, unlike the typically concave fourth facet.
Conclusions:
- The distal hamate's articular surface exhibits substantial variability in the general population.
- These findings highlight the need for individualized assessment in surgical planning.
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