Morphometric analysis of maxilla applied to Le Fort I osteotomy
DOI:
https://doi.org/10.34019/1982-8047.2019.v45.13888Keywords:
Maxilla, Orthognathic Surgery, OsteotomyAbstract
Introduction: The Le Fort I osteotomy is a surgical technique used for correction of dentofacial deformities and dislocation of the pterygomaxillary suture for mobilization of maxilla. During this procedure, complications may happen, such as hemorrhage resulting from the injury of the internal maxillary artery or its terminal branches, in which the descending palatine artery is more common to be injured. Objective: The aim of this study was to contribute for establishment of safe surgical parameters to improve osteotomy with pterygomaxillary disjunction, through the measurement of the maxillary and pterygomaxillary regions. Material and Method: Forty dry skulls (male and female) of the Department of Anatomy of a public institution were selected and the measurements were made by the direct inspection method using a Mitutoyo® digital caliper and a Staedtler compass ®. The height and thickness of the pterygomaxillary junction, the distance from the pterygomaxillary suture to the zygomatic pillar, the distance from the lower point of the pterygomaxillary suture to the inferior orbital fissure, the extension of the lateral wall of the nasal cavity to the descending palatine canal, and the length of the nasal septum, bilaterally, were measured. For the statistical analysis of the results, the t-test was used for independent samples, with a significance level of 5%. Results: We found that on the right side, the averages of the respective measurements were 14.88mm, 9.17mm, 27.60mm, 34.47mm and 36.86; and on the left side, the averages were, respectively, 15.18mm, 9.08mm, 26.50mm, 34.70mm and 36.02mm. The mean value of nasal septum length was 49.10 mm. Conclusion: Based on the values obtained it is possible to establish operative parameters for the Le Fort I osteotomy.
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