Fig. 1From: The reconstruction of fingertip injury by mini hallux toenail flap pedicled with the hallux transverse artery and toe pulp vein transplantation technique based on the equivalent design theoryAllen’s classification of fingertip injury. Type I: Only finger pulp is injured. Type II: The finger pulp with less than 1/2 of the nail bed and a small amount of the distal phalanx are injured. Type III: Entire nail bed and the partial distal phalanx are injured. Type IV: Proximal nail fold and distal phalanx are injuredBack to article page