Clockwise and Counterclockwise Le Fort I Movements Influence Nasolabial Morphology Differently

Introduction: Le Fort I maxillary advancements are reported to affect nasal proportions. However, there is a no significant data on the three-dimensional nasal changes that occur with differential lateral plane adjustment (clockwise (CW) and counterclockwise (CCW) movements) during Le Fort I maxillary advancements. The purpose of this study was to analyze and compare nasolabial soft tissue changes after Le Fort I CW and CCW repositioning. Methods: Single-piece Le Fort I advancements were included in this morphometric study. A retrospective study of patients split into CW and CCW groups was performed. Pre- and postoperative 3D photographs (VECTRA, Canfield, Fairfield, NJ) were analyzed. Nasolabial anthropometric measurements were recorded (Mirror). Two observers verified the landmarks. Statistical analysis involved paired t test to compare pre- and postoperative nasolabial measurements. Results: Twenty-four patients were evaluated (12 per group), with 22 distinct nasolabial relationships measured. CCW showed a statistically significant increase in alar width (3.6mm, P