1353 Accuracy of Surgical movements in the Le Fort I Osteotomy

Abstract

Abstract Introduction The Le Fort I osteotomy is a surgical procedure planned by a joint orthognathic team aiming to correct skeletal discrepancies of the maxilla, with subsequent soft tissue profile changes of the patient. We undertook a retrospective case series analysis of patients receiving Le Fort I surgery at a UK teaching hospital over the last four years to assess the accuracy of Le Fort I surgical movements, by comparing the actual maxillary movement with planned surgical movements. Method A retrospective analysis of patients receiving Le Fort I surgery over a 4-year period, 2016-2020, was completed. Pre- and post-surgical lateral cephalograms were traced to determine postoperative anterior maxillary movements, and these were compared to the original orthognathic plan. Based on a literature review, we created a locally established standard of surgical movement to be within 2mm of planned movement on the lateral cephalogram trace for a satisfactory outcome. Results 91% of patients undergoing Le Fort I surgery (n = 11) had postoperative maxillary movement within 2mm of the surgical plan, and the mean difference between planned and surgical movements was 1.13mm. Conclusions Our retrospective analysis shows there is good surgical accuracy demonstrated of Le Fort I maxillary advancement movements compared to their original plan. Following this, we will continue to monitor and maintain this high standard for optimal patient outcome.