Thesis Type: Doctorate
Institution Of The Thesis: Gazi Üniversitesi, Sağlık Bilimleri Enstitüsü, Turkey
Approval Date: 2017
Student: MEHMET EMİN TOPRAK
Supervisor: MUSTAFA SANCAR ATAÇ
Abstract:The maxillary sinus lift techniques require detailed knowledge of sinus anatomy and the possible anatomic variations. The sinus lift operation may be difficult to perform if an abnormal sinus anatomy is encountered such as an antral septum. The purpose of this study was to determine the prevalence, size, location and morphology of the maxillary sinus septa in dentate, partially edentulous and completely edentulous maxillary segments using cone beam computed tomography (CBCT). The sample population consisted of 300 patients (140 men and 160 women, mean age of 50,72 ± 13,99 years) and reformatted CBCT of 600 sinuses were analyzed. The prevalence of maxillary sinus segments with septa was found to be 187/600 (31,17%) in the overall study population. A total of 208 septa were found in 600 maxillary sinus segments, which corresponded to 44% of the patients (132 of 300). Completely edentulous segments presented with 50,96% of total septa, while 30,77% and 18,27% of septa identified in partially edentulous and dentate segments, respectively. The analysis of the anatomic locations of the septa were revealed that; 42 (20,19%) were located in the anterior, 124 (59,63%) in the middle, and 42 (20.19%) in the posterior regions. The prevalence of the septa in the completely edentulous segments and middle regions were statistically higher than other sinus segments and regions. The mean heights of the septa were 7,21 ± 3,03 mm, 5,86 ± 2,98 mm and 5,89 ± 2,95 mm in the medial, middle, and lateral areas, respectively. Orientations of septa were buccopalatal in 98,08% of cases and 206 subjects (99,04%) were incomplete septa. According to the results of this study, it can be concluded that there is a wide anatomical variation in the morphology, prevalence, height and location of maxillary sinus septa. Therefore, to prevent possible complications during sinus surgery, extensive evaluations of the anatomic structures inherent to maxillary sinus with an appropriate radiographic technique is indispensable.