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Year : 2022  |  Volume : 14  |  Issue : 3  |  Page : 306-315

Assessment of proximity of the maxillary premolars roots to the maxillary sinus floor in a sample of Egyptian population using CBCT: An observational cross-sectional study

Oral and Maxillofacial Radiology, Faculty of Dentistry, Cairo University, Cairo, Egypt

Correspondence Address:
Dr. Esraa K Morsy
11 Saraya Street, El Manial, Cairo
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jioh.jioh_355_21

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Aim: This research was conducted to assess the relationship between permanent maxillary premolar root apices and the maxillary sinus floor (MSF) in a sample of Egyptian population using cone beam computed tomography (CBCT). Materials and Methods: In this observational cross-sectional study, 128 CBCT scans were coded and recruited using simple random sampling method. A total of 216 upper first premolars and 232 upper second premolars were examined, according to the eligibility criteria. The scans were displayed using Planmeca Romexis® Viewer software, where image analysis was performed on corrected axial, coronal, and sagittal images. Gender of the patient was registered for each scan. The proximity between the maxillary premolars roots and the maxillary sinus floor (MSF) was determined according to Kilic et al.’s 2010 classification. The difference between the prevalence of different sinus relations in males and females was recorded, and correlation between right and left sides was determined. Categorical data were presented as frequency and percentage values and were analyzed using Fisher’s exact test and χ2 followed by multiple pairwise comparisons utilizing multiple z-tests with Bonferroni correction. The significance level was set at P < 0.05 within all tests. Results: The maxillary first premolars showed higher percentages for “No relation,” followed by type 3 than type 2. In contrast, type 2 was the most prevalent sinus relation in maxillary second premolars, followed by type 3. Conclusion: In a sample of the Egyptian population, most of the maxillary first premolars had no relation to the MSF. On the contrary, most of the maxillary second premolars were positioned much closer to the MSF where they recorded the highest percentage for type 2 sinus relation (roots contact sinus). In most cases, the palatal roots were closely related to the MSF than buccal ones in all maxillary premolars.

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