A three-dimensional analysis of nasal cavity volume after maxillary LeFort I osteotomy

Publication date: Available online 10 January 2018
Source:Journal of Oral and Maxillofacial Surgery
Author(s): Yong-Chan Ha, Se Jin Han
PurposeTwo- and three- dimensional studies on the changes of pharyngeal airway after LeFort I osteotomy have been conducted, but there are few studies on the change of nasal structure. The nasal cavity is the first passage through which air enters during respiration. The movement of the maxilla by LeFort I osteotomy affects the shape of the nasal cavity as well as the shape of other parts of the airway. In this study, we compared the preoperative and postoperative changes of the nasal cavity volume after a maxillary LeFort I osteotomy.Materials and MethodsPre- and post-OP CT of 32 patients were assessed for nasal cavity volume according to the direction of maxilla movement.ResultsA total of 32 patients(22 males, 10 females) were classified according to the direction of maxilla movement.- Group 1 : Maxillary impaction, 8 males, 6 females- Group 2 : Maxillary impaction & advancement, 14 males, 4 femalesThe volume of nasal cavity was significantly decreased after Lefort I osteotomy in both groups. Maxillary impaction group(Group I) represented positive correlation between ratio of impaction and ratio of volume difference. Maxillary impaction and advancement group(Group II) represented no correlation between ratio of impaction or advancement and ratio of volume difference.ConclusionWe concluded that impaction and advancement of the maxilla caused decreasing nasal volume.



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