Reconstruction of thumb by technique of Gillies and Millard, modified. A, Outline of curved incision around dorsal, radial, and volar aspects of base of thumb. B, Hollow flap has been undermined and elevated, iliac bone graft has been fixed (this time to base of proximal phalanx), and raw area at base of thumb has been covered by split-thickness skin graft. SEE TECHNIQUE 19.15.