Figure 4.

(A) The distal medial navicular articulation. The blue arrow denotes the direction of the viewing plane. (B) The “triangular” variant with a dorsal-directed apex and 2 rounded corners at the plantar base. The fibrous component of the articulation is predominantly located at the plantar base with a thin rim of fibrous tissue along the medial border and dorsal apex. (C, D) The (C) “trapezoidal” and (D) “rhomboidal” variants, both with fibrous tissue outlining the plantar base and medial border of the facets, with a thin rim of fibrous tissue along their dorsal border.