Articular Surface
Definition
The smooth cartilage-covered end of a long bone that forms a joint. Shape, curvature, and proportional dimensions of articular surfaces are primary gross morphological characters for both element identification and species assignment.
- Location
- End of a long bone
- Composition
- Cartilage-covered bone
- Forensic use
- Element identification and species assignment
- Key features assessed
- Shape, curvature, proportional dimensions
Common questions
Why are articular surfaces preferred over shaft fragments for identification?+
Joint surfaces retain species- and element-specific morphology such as curvature and facet arrangement even when the rest of the bone is fragmented or weathered, whereas a shaft fragment often lacks distinguishing landmarks.
What happens to identification confidence when the articular surface itself is damaged?+
Confidence drops sharply, since the surface carries most of the diagnostic shape information; an examiner then has to rely on secondary features like cortical thickness or trabecular pattern, which are less reliable for species assignment.
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