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Dynamic analysis of maxillary perfusion during Le Fort I osteotomy using indocyanine green.
The aim of this study was to evaluate the dynamic perfusion of the maxilla during various stages of a Le Fort I osteotomy using indocyanine green (ICG) dye angiography. This was a retrospective evaluation of patients who underwent a Le Fort I osteotomy. ICG was used to assess perfusion at specific time points during the procedure. Twenty-four patients underwent a Le Fort I osteotomy with dynamic perfusion ICG angiography. Statistically significant differences in perfusion were noted at all three locations assessed between preoperative (T0), post down-fracture (T1), and postoperative (T2) time points. When controlling for mean arterial pressure, statistically significant differences were noted at all three locations assessed between T0 and T1, and between T0 and T2. There were no statistically significant differences in patient age, heart rate, preservation or sacrifice of the descending palatine arteries, or conventional vs. segmental Le Fort I osteotomies across T0, T1, and T2. In conclusion, there was a statistically significant decrease in perfusion, as assessed by intraoperative dynamic angiography, to the anterior maxilla following maxillary down-fracture. Patient age, conventional vs. segmental Le Fort I osteotomy, changes in mean arterial pressure and/or heart rate, and preservation of the descending palatine vessels had no statistically significant effect on perfusion.
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