Complications accompanying lateral Sinus Augmentation
Background: The most common intraoperative complications of lateral sinus augmentation are hemorrhage and Schneiderian membrane perforation. Aims: To evaluate the incidence of complications during lateral sinus augmentation surgery, and to estimate the potential risk factors. Materials and Methods: Twenty-five patients, ages ranged from 25-72 years, met the eligibility criteria. A total of 35 lateral sinus augmentation procedures were performed utilizing demineralized bovine bone and 52 dental implants simultaneously installed. The potential risk factors were evaluated clinically and radiographically, to analyze their relationship with the incidence of intra and postoperative complications. Results: The alveolar antral artery was detected by cone beam computed tomography scans in 30 cases (85.71%) out of 35 lateral sinus augmentation procedures. Intraoperative hemorrhage occurred in 8 cases (26.67%). There was a significant correlation between vessel diameter ≥ 1 mm and the occurrence of hemorrhage (P=0.0001). The incidence of Schneiderian membrane perforation was 11 (31.42 %). There was no statistically significant correlation between patient, surgery, and maxillary sinus properties-related risk factors with intraoperative membrane perforation, except one significant risk factor which was the alveolar antral artery with a diameter ≥ 1 mm. Conclusions: The present study deduced that alveolar antral artery with a diameter ≥ 1 mm is the only risk factor that statistically significantly increased the incidence of hemorrhage and Schneiderian membrane perforation during lateral sinus augmentation procedure.