Traumatic facial soft tissue injury often creates both aesthetic and functional deficits. In complete lip avulsions, microvascular replantation is a reconstructive option that has the potential to fulfill both of these goals. However, lip replantations remain rare and there are few reports in the literature. The authors aim to present a clinical report of a young male who sustained a human bite injury and underwent microvascular replantation of a completely avulsed lower lip and to review the literature and management of these complex injuries.