Case presentation in which a 12-years-old boy presented with two large gingival recessions on the maxillary central incisors, secondary to a lateral luxation. In the surgical procedure, an acellular dermal matrix graft (ADMG) was placed as a substitute for a free gingival graft. Twelve months later, complete root coverage was achieved, showing that ADMG, a biomaterial recently developed for mucogingival surgery, can be successfully used in the treatment of gingival recessions in pediatric patients.