Fig. 127.8 Lunate dislocation. (A) This posteroanterior view shows the characteristic triangular shape of the lunate bone during dislocation. (B) Volar displacement of the lunate resembles a spilled teacup on the lateral view. Note the disrupted articulation between the lunate and distal radius and realignment of the radius, capitate, and metacarpals, suggesting lunate dislocation.