Evaluation of Orthognathic Surgery’s Effect on Maxillary-Sinus Volume with CBCT

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Duyan H., Evlice B.

CED-IADR/NOF Oral Health Research Congress, Madrid, Spain, 19 - 21 September 2019, pp.107

  • Publication Type: Conference Paper / Summary Text
  • City: Madrid
  • Country: Spain
  • Page Numbers: pp.107
  • Çukurova University Affiliated: Yes


Objectives Aim of this study was to demonstrate the anatomical and morphological changes in maxillary sinuses by CBCT (ConeBeam Computed Tomography) after Le Fort I osteotomy. Methods 32 patients, with Le Fort I osteotomy performed between April 2015-November 2017 and with CBCT scans taken 3 to 12 months after the procedure, were included in this study. Surgical intervention type was dependent on specific deformity of each patient. Preoperative and postoperative maxillary sinus ventilation volumes were measured with volumetric analyzes by using a 3D software. In addition, presence of septa and maxillofacial deformity type were recorded for each patient. Descriptive statistics were calculated for each variable and paired analyzes were used to compare pre/postoperative values. Results Data of 32 patients (17 female; 15 male) were examined (mean age 26.40±7.54; mean follow-up period 5.25 months). The patients had various maxillofacial deformities (8 patients had class II; 24 patients had class III malocclusion). In 27 patients, septa formation was observed in the right and left maxillary sinuses before the operation. Ratio of postoperative decrease in left maxillary sinus ventilation volume was % 25.01 and in right maxillary sinus ventilation volume was % 18.01. The decrease in both right and left maxillary sinus ventilation volumes after surgery was statistically significant (p<0.05). Conclusions Results of the study indicate that Le Fort I osteotomies may have a significant effect on sinus health. The postoperative radiological findings of the maxillary sinus inflammatory processes in these patients point out usefulness of CBCT scans in patient follow-up.