Articular Facet of Distal Phalanx of Thumb
Facies articularis phalangis distalis pollicis
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The articular facet of the distal phalanx of thumb is the concave, oval, superior area of its base. It articulates with the distal articular facet of the proximal phalanx of thumb, forming the interphalangeal joint of the thumb.
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Finger Phalanx
The finger phalanx measurement site is the distal metaphysis of the first phalanx of the last four fingers.