Abstract
Background and objectivesInferior scleral exposure is an aesthetic as well as functional concern. The purpose of this study was to evaluate and compare changes in scleral exposure following Le Fort I (LFI) maxillary advancement or impaction. Methods43 patients with inferior scleral show who underwent LFI osteotomy were studied. Patients underwent two types of surgery: maxillary advancement was performed in 21 patients and maxillary impaction in 22 patients. Preoperative and 6-month postoperative frontal photographs of patients were analyzed with Adobe Photoshop CC 2018 and compared for scleral exposure by the ratio of the distance between inferior eyelid margin and corneal limbus to eye height. ResultsThe mean maxillary movement was 6.14 mm advancement in LFI advancement group and 4.4 mm impaction in LFI impaction group. The mean scleral show ratio decreased by 4.25% (4.4% in the right and 4.1% in the left eye) in LFI advancement and 3.65% (3.5% in the right eye and 3.8% in the left eye) in LFI impaction group. These changes were statistically different in each group but they were the same when comparing two groups (p-value > 0.05). ConclusionBoth LFI advancement and LFI impaction significantly decreased scleral exposure in our patients.
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