Evaluation of septa frequency in the maxillary sinuses with edentulous and dentulous areas through computed tomography

Abstract

Objective: To analyse the number of septa in the maxillary sinuses using computed tomography (CT) in correlation with gender, age and the presence of teeth in the region. Materials and methods: The sample consisted of 300 CT scans obtained from a private radiology clinic between 2009 and 2011. The CT scans included in the study should have the appropriate image of the maxillary sinus and contain information regarding age, gender and the date of the examinations. Patients with a history of pathologies in the region, patients who underwent floor of mouth surgery and patients less than 20 years of age were excluded from the sample. The authors considered osseous septa to be septa with a height above 4 mm in relation to the base of the sinus floor. The sample was divided into three groups: (i) presence of all teeth, (ii) partially edentulous -a minimum of two teeth present between the second premolar and second molar -and (iii) totally edentulous. The data were divided and stratified by age and gender. Results: The frequency of septa in the maxillary sinus was 37.80% (n = 183). No significant difference was observed among the five age groups (P > 0.05); additionally, there was no significant difference in septa frequency (P > 0.05) -analysis of variance (ANOVA), Tukey's. Univariate and multivariate ANOVA showed a significant interaction between tooth loss and age (P < 0.05). Conclusion: Statistical analyses demonstrated no difference in the number of septa in relation to age, gender or the number of teeth in the posterior maxilla. Clinical relevanceAfter tooth loss, the posterior maxillary alveolar bone suffers intense resorption and pneumatization of the maxillary sinus. These events reduce the available volume of the bone conventional dental implants fixation. Several surgical techniques are used in accessing the sinus floor to increase the membrane and attach the implant. The presence of bony septa increases the risk of surgical complications and requires surgical experience from the professional. This article evaluated the frequency of septa in 300 computed tomography scans, correlating gender, age and presence or not of teeth. It was concluded that the frequency of the septa is high and no correlation was found.

Determination of the Prevalence, Height, and Location of the Maxillary Sinus Septa Using Cone Beam Computed Tomography

“…1,7,14 The reported prevalence of septa in studies using the 3D imaging techniques has been variable from 25% to 70%. 1,[5][6][7][8]10,14,[20][21][22][23][24] In our study, the prevalence of septa was 44.8% in all patients, which is in accord with the results of Neugebauer et al 1 Panoramic radiography is the most commonly used 2-dimensional (2D) imaging modality. Owing to several limitations, it is not used before implant placement alone.…”

“…Most studies that used CT reported a relatively lower prevalence for septa than our value, [6][7][8]10,16,20,28 except for Maestre-Ferrín et al 5 who reported 70% incidence. CT as a 3D technique can reveal the anatomical details of the maxillary sinus.…”

Cone-beam computed tomographic analysis of maxillary sinus septa among Yemeni population: a cross-sectional study

“…The present study found no relationship between dental status (dentate, partially edentulous, edentulous) and the prevalence of septa (63.8% of dentate, 22.1% of partially edentulous, and 14.1% of edentulous). This finding is consistent with Shen et al [ 22 ] who observed no correlation between septa prevalence and the absence of maxillary first or second molars, consistent with recent studies [ 2 , 14 , 21 , 24 , 38 , 39 ]. The present study contradicts other studies [ 35 , 40 , 41 ] which showed edentulous ridges have more septa than dentate ridges, as concluded by Krennmair et al and Kim et al, who proposed the hypothesis that atrophic edentulous maxilla considers secondary septa [ 42 , 43 ].…”

Cone-Beam Computed Tomographic Analysis of Maxillary Sinus Septa among Yemeni Population A Cross-sectional study

“…This nding is consistent with Shen et al [22] who observed no correlation between septa prevalence and the absence of maxillary rst or second molars, consistent with recent studies [2,18,21,[42][43][44]. The present study contradicts other studies [38, 45,46] The thickness of the membrane at the septa origin is almost twice as thick as it is from the septa origin [53].…”