Due to graft rejection there was a huge infected cyst with sequestrum (Dead bone) in the involved region of mandible. Intraorally there was an incomplete closure of buccal mucosa where the sequestrum was exposed. After thorough clinical and radiological examination, Maxillofacial Surgeon Dr. S. M. Balaji successfully removed the dead bone with the infected cyst intraorally and reconstructed the same with costochondral rib graft. Patient feels happy to have both the removal and reconstruction of the infected portion of mandible without any visible surgical marks on the face.