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Prognostic factors for maxillary sinus mucosal thickening following Le Fort I osteotomy: a retrospective analysis

  • Iwamoto, Masashi (Department of Oral Pathobiological Science and Surgery, Tokyo Dental College) ;
  • Watanabe, Miki (Department of Oral and Maxillofacial Surgery, Tokyo Dental College) ;
  • Yamamoto, Masae (Department of Oral Pathobiological Science and Surgery, Tokyo Dental College) ;
  • Narita, Masato (Department of Oral and Maxillofacial Surgery, Tokyo Dental College) ;
  • Kamio, Takashi (Department of Oral and Maxillofacial Surgery, Tokyo Dental College) ;
  • Takaki, Takashi (Department of Oral and Maxillofacial Surgery, Tokyo Dental College) ;
  • Shibahara, Takahiko (Department of Oral and Maxillofacial Surgery, Tokyo Dental College) ;
  • Katakura, Akira (Department of Oral Pathobiological Science and Surgery, Tokyo Dental College)
  • Received : 2019.01.25
  • Accepted : 2019.02.19
  • Published : 2019.12.31

Abstract

Background: Le Fort I osteotomy is one of the surgical procedures now routinely and safely performed. It is possible to move the maxilla in three dimensions, but it is necessary to separate the bones around the maxillary sinus. Therefore, with surgery, maxillary sinus mucosal thickening occurs. By knowing the changes in the sinus mucosa after surgery and the factors affecting it, it is possible to better predict the outcomes of surgery and contribute to safer surgery. In this study, thickening of maxillary sinus mucosa before and after surgery in Le Fort I osteotomy was evaluated using multidetector-row computed tomography (MDCT) images, and the changes in mucosal thickening and the related factors were examined. Methods: Using MDCT images, the maxillary sinus mucosa of 125 patients who had undergone Le Fort I osteotomy was retrospectively evaluated before surgery, 1 month after surgery, and 1 year after surgery. On the MDCT images, the maxillary sinus was judged as mucosal thickening and classified into three grades according to the proportion occupying the maxillary sinus. In the evaluation of factors related to mucosal thickening, the following eight factors were examined: sex, age, diagnosis, operating time, amount of postoperative bleeding, with/without bone graft, with/without multisegmental osteotomy, and with/without macrolide therapy after surgery. Results: The mean age at the time of surgery was 25.6 ± 8 years. Of all 125 patients, 66 had bilateral thickening, 19 had unilateral thickening, and 40 had no thickening. Factors that were significantly related to mucosal thickening were the operative time for the maxilla, bone grafts, and macrolide therapy after surgery. Conclusions: Operative time for the maxilla, bone grafts, and macrolide therapy after surgery were found to be related to mucosal thickening. In addition, MDCT scanning 1 month after surgery was considered to be appropriate for evaluation of maxillary sinus mucosal thickening.

Keywords

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