According to our results, in impaction Le Fort 1 osteotomy, the bone resection must pass 20 mm above the alveolar border in canine area, and 15 mm above the alveolar border in molar area. The resection has to end less than 20 mm above the inferior border of the pterygomaxillary suture. The vertical height of the infraorbital foramen is a consistent landmark for repositioning of the palate in a horizontal plane.
According to our results, the height of the PM junction is less than 14 mm and during the PM disjunction there is a risk of injuring the maxillary artery 18 mm above the inferior extremity of the PM junction.
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