[Reconstruction of the loss of substance of the lower lip. The "running stairstep" technic].

Reconstruction of near the totality of the lower lip after oncological resection or traumatic amputation, is a very challenging problem. The "step technique", introduced by Johanson, allows a good repair of the amputated lip, regarding amplitude, colour and function. The design of the flaps is recalled; and the authors present two cases which demonstrate the good result obtained with this simple but reliable method.