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    The Assessment of External Nasal Valve Efficiency After Le Fort I Surgery
    (Lippincott Williams & Wilkins, 2023) Dilaver, Emrah; Suzen, Muazzez; Seyidoglu, Ayda; Uckan, Sina
    BackgroundThe present study investigated how external nasal valve function is affected after Le Fort I osteotomy using external nasal valve efficiency (ENVE) index.Materials and MethodsTwenty-one patients who underwent Le Fort I osteotomy with or without mandibular osteotomy were included in the retrospective study. Preoperative and postoperative standardized videos of basal view of the nose during breathing were recorded, and 2 screenshots were taken, 1 in the resting position and the other after deep inspiration. External nasal valve efficiency was calculated at preoperative and postoperative periods for each patient.ResultsOf the 21 patients, 12 were women and 9 were men (mean age, 26.63 & PLUSMN; 8.20 years). The mean ENVE index was 0.75 & PLUSMN; 0.16 for the preoperative period and 0.82 & PLUSMN; 0.17 for the postoperative period. There was a significant difference between these values (P = 0.002). When the correlation of the ENVE with maxillary movements was analyzed, the ENVE was negatively affected by maxillary impaction (P = 0.011, r = -0.540).ConclusionsThese findings imply that Le Fort I osteotomy positively affects the ENVE index. However, because of the antagonistic relation between maxillary impaction and ENVE, higher maxillary impaction amounts or isolated maxillary impaction should be carefully planned in patients with low ENVE index.