New Technique: Le Fort I Osteotomy for Maxillary Advancement and Palatal Distraction in 1 Stage

摘要

Transversal palatal distraction is a new method for treating transversal maxillary hypoplasia using the os-teodistraction procedure, which has proven very valuable in other surgical fields. For many years, maxillary width discrepancies have been corrected in pediatric patients solely by orthodontic therapies, such as slow orthodontic expansion (SOE) and rapid palatal expansion (RPE), and in adult patients by surgical treatments such as surgically assisted rapid palatal expansion (SARPE) and 2-segment Le Fort I-type osteotomy with expansion (LFI-E).Although commonly performed, these therapies present some problems related to the tooth-borne appliances (ie, SOE, RPE, SARPE), including alveolar bone bending, peri-odontal membrane compression, root reabsorption, and lateral tooth displacement and extrusion. Long-term stability remains problematic as well. Relapse is the main problem after a LFI-E maxillary osteotomy combined with a midpalatal osteotomy, probably due to the lack of a palatal retention appliance, fibrous scar retraction, and palatal fibromucosal traction#