Frequency, location, and morphology of accessory maxillary sinus ostia: a retrospective study using cone beam computed tomography (CBCT)

A Study on the Association Between Accessory Maxillary Ostium and Maxillary Sinus Mucosal Thickening Using Cone Beam Computed Tomography

“…[29] In our study the inter observer reliability was 0.83 and intra-observer reliability for detecting the presence of AMO was 0.85. The observers' reliability values in our study were consistent with the values found in the study by Hung et al [9] Nevertheless, few other researchers did not evaluate the components of inter and intra observer variability in their studies. [6] In our study there was no statistically signi cant difference in the occurrence of AMOs between male and female subjects, although the occurrence was numerically higher in male subjects.…”

“…However, when we evaluated the maximal length the of AMOs with the type of MT, it was observed that larger AMOs were associated with higher degree of MT. This was similar to the observation in the study by Hung K et al [9] They proposed that AMO decreases the clearance of mucus secretions in the corresponding maxillary sinus, which could make the sinus susceptible to pathologies. [6,9]…”

“…We also identi ed the location of the AMO based on its distance from the oor and the anterior wall of the maxillary sinus. The location of the AMO was determined by some of the studies and case reports based on the landmarks on the lateral nasal wall, such as the anterior and posterior fontanelle [1,9,32,33,34] Other studies have identi ed the location of the ostium based on their distance from the landmarks such as oor of the sinus and anterior wall of the sinus. [35,36,37] Due to the variability of landmarks on the lateral nasal wall, we chose the latter approach based on measurements.…”

“…[15,22−25] Studies carried out on Chinese, Indian and Turkish population revealed prevalence rates of AMOs to be 47.2 percent, 23.7 percent and 38.8 percent, respectively. 9,26,27 In general, the prevalence of AMOs ranges from 20 percent to 50 percent in studies using CT, CBCT scans and endoscopy. The likely explanations for this difference may be ethnic difference and the sensitivity of investigative imaging system.…”

“…The longest dimension of AMO in the sagittal CBCT segment was measured as suggested by Hung et al (Figure 4). 9 The mucosal thickening was evaluated and classi ed based on criteria used by Sheiki et al 10 According to the criteria the MT is measured at six points in each of the sinuses. The mesial and distal sides of the second premolar and rst and second molar teeth were the six points of measurement.…”