The Relation Between Maxillary Sinus Floor and Posterior Maxillary Teeth Roots Using Panoramic and Cone Beam Computed Tomography

Abstract

Understanding the anatomical and pathological relationships between posterior teeth or edentulous area with maxillary sinus is essential for diagnosis and treatment management.The present study aimed to assess the relationship between maxillary sinus floor and posterior teeth roots using panoramic radiography and Cone Beam Computed Tomography (CBCT). Materials and Methods: In this analytical cross-sectional study, 440 maxillary first and second premolars, and first and second molars of 55 patients were selected by the census method. The patients were referred to Sajad Maxillofacial Radiology and Navabazam Maxillofacial Surgery Clinic in Yazd City from 2011 to 2015. The relationship between each root and maxillary sinus floor was examined by oral radiologist and trained dentistry student using CBCT and panoramic radiography. To check the reproducibility of the first observer, a second observer examined 20 radiographs daily for five days and in random orders. No difference was found between the observers. The collected data were analyzed by ANOVA, Chi square, Fisher's exact test, and t test using SPSS (P≤0.05). Results: The agreement between CBCT and panoramic radiographs in determining root form was measured with kappa, which was found as 0.549 (P=0.0001). This implies that CBCT and panoramic radiographs showed an agreement in determining the position of maxillary sinus floor and posterior teeth roots. The difference between calculated mean (SD) distances of the two methods was 0.74(2.92) mm (P=0.0001). This indicates that the measurements by panoramic radiographs differ from CBCT. Conclusion: Our study results supports use of CBCT to establish the exact correlation between maxillary sinus floor and posterior teeth roots, especially in classification 3 (projected in panoramic radiographs) for reducing damages and infection transmission.

Assessment of the association of maxillary sinus mucosal lining thickening with different dental conditions using cone-beam computed tomography in a sample of the Egyptian population. Observational Cross-sectional study.

“…Sensitivity was (97.5%), specificity was (16.2%), positive predictive value was (79.3%) and negative predictive value was (66.7%). Results of the model presented in table (3) showed that age, sex, presence of periapical lesion and dental caries all had a significant effect on MT occurrence (p<0.05). It was found that a year increase in age increased the odds of MT by 1.05, males had 2.86 higher odds of having MT than females, presence of periapical lesion increased the odds of MT by 6.38, and the presence of dental caries increased the odds of MT by 2.87.…”

“…CBCT scans were chosen according to the inclusion and exclusion criteria previously mentioned in the methodology chapter. The age of the patients who took part in the research started from 20 years because it is the estimated age when the maxillary sinus growth stops [3,6] , further second premolar, first and second molar teeth were chosen for assessment due to their close approximation to the sinus floor [3,37,38] .…”

“…The maxillary sinus is the largest and first to form of the paranasal sinuses. It is a cavity in the maxillary bones that is filled with air with the size, shape, and wall thickness that diverges from one person to another, as well as between the two sides of the same person [2,3,4] .…”

“…The maxillary alveolar process, with varying extension towards the alveolar ridge and close proximity to the posterior maxillary teeth, forms the floor. [3,5] .…”

Intrusion of maxillary molar roots into the maxillary sinus in a sample of the Egyptian population using cone beam computed tomography

“…Many studies used different scoring systems to categorize the sinus-root relation in different populations [8][9][10][11][12][13][14][15]. The simplest of all these systems consists of three classes, class 1: root tip is outside the sinus, class 2: root tip is against the sinus wall, and class 3: root tip is in the sinus [16][17][18][19][20][21].…”