Introduction : The most serious complication of maxillary sinus floor augmentation is postoperative infection including max illary sinusitis. Maxillary sinusitis after implant surgery is associated with postoperative local inflammation, dysfunction of the maxillary sinus due to bacterial infection and obstruction of the ostium or ostiomeatal complex. Therefore, we examined the changes in the maxillary sinus mucosa before and after maxillary sinus floor augmentation and the factors affecting the post operative increase in maxillary sinus mucosal thickness.
Subjects and Methods : The subjects were patients who underwent maxillary sinus floor augmentation surgeries with the lateral approach to the maxillary molar defect. The changes in maxillary sinus mucosal thickness before and after surgery, and the factors affecting postoperative maxillary sinus mucosal thickness (preoperative maxillary sinus mucosal thickness, age, sex, presence of systemic disease, smoking, nasal septal deviation, residual bone height, defect type, operative procedure, maxillary sinus mucosal perforation, period from tooth extraction) were investigated.
Results : There were 28 patients (9 males and 19 females), 31 sinuses, and the average age was 59.5 years. The maxillary sinus mucosa had a mean thickness of 1.04 ± 1.17 mm preoperatively, 6.40 ± 3.90 mm within 7 days after surgery, and 6.96 ± 3.59 mm within 8 to 14 days after surgery. The results showed that the preoperative maxillary sinus mucosal thickness, age, nasal septum deviation and tooth extraction period were associated with the postoperative maxillary sinus mucosal thickness.
Conclusion : We conducted a CBCT study on the factors affecting the increase in postoperative maxillary sinus mucosal thickness after maxillary sinus floor augmentation using the lateral approach.
The following conclusions were obtained.
1. The postoperative maxillary sinus mucosal thickness tended to increase significantly within 7 days after surgery and 8 to 14 days after surgery compared with before surgery.
2. The postoperative maxillary sinus mucosal thickness is affected by the preoperative maxillary sinus mucosal thickness, age, period after tooth extraction, and nasal septal deviation.
When performing maxillary sinus floor augmentation surgery, it is necessary to consider not only the preoperative maxillary sinus mucosal thickness but also the period after tooth extraction and nasal septum deviation.
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