Influence of the anatomical form of the posterior maxilla on the reliability of superior maxillary repositioning by Le Fort I osteotomy

N. Tomomatsu, K. Kurohara, K. Nakakuki, H. Yoshitake, T. Kanemaru, S. Yamaguchi, T. Yoda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Certain patients with facial deformities require superior repositioning of the maxilla via Le Fort I osteotomy; however, the magnitude of superior repositioning of the maxilla is often less than expected. In this study, the correlation between the accuracy of superior repositioning of the maxilla and the anatomical form of the maxillary posterior region was examined. Seventy-five patients who underwent Le Fort I osteotomy without forward movement of the maxilla but with superior repositioning of the maxilla were included in this study. The bone volume around the descending palatine artery (DPA), the angle of the junction between the pterygoid process and the tuberosity, and the distance between the upper second molar and the pterygoid process were measured via three-dimensional analysis. A significant negative correlation (r = −0.566) was found between the bone volume around the DPA and the ratio of repositioning (actual movement divided by expected movement). It is possible that the superior repositioning of the maxilla expected prior to surgery was not sufficiently attained because of the large volume of bone around the DPA. The results of this study show that in some patients, superior repositioning was not achieved at the expected level because of bone interference attributable to the anatomical form of the maxillary posterior region.

Original languageEnglish
Pages (from-to)612-619
Number of pages8
JournalInternational Journal of Oral and Maxillofacial Surgery
Volume48
Issue number5
DOIs
Publication statusPublished - 2019 May
Externally publishedYes

Keywords

  • 3D analysis
  • anatomical form
  • descending palatine artery
  • Le Fort I osteotomy
  • pterygoid process
  • superior repositioning of the maxilla

ASJC Scopus subject areas

  • Surgery
  • Oral Surgery
  • Otorhinolaryngology

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