Ricerc@Sapienza

Background: The Pierre Robin Sequence (PRS) is characterized by micrognathia, glossoptosis and airways obstruction. The fast and early mandibular distraction osteogenesis (FEMOD) is an effective procedure in the management ofpatients diagnosed with severe Pierre Robin Sequence. Objectives: Aim of the study is to introduce the “Floating

After a failed mandibular osteodistraction, the wrong positioned mandible of a few patients with Pierre Robin sequence returned in the most functional position and regained a proper symmetry, without external intervention. The study aims to explain this self-adjustment and introduce the floating bone phenomenon.The inclusion criteria were severe micrognathia, Fast and Early Mandibular Distraction Osteogenesis protocol, postoperative mandibular wrong positioning, presurgery, immediate postsurgery, and long-term computed tomography scan. Five patients were included.