CT scan evaluation of the distance between maxillary sinus floor and maxillary teeth apices

Abstract

BACKGROUND. The relationship between the maxillary sinus floor and the roots of the teeth in the upper arch is essential, especially in the correct diagnosis and treatment of odontogenic maxillary sinusitis. The aim of this study was to determine exactly this distance and to observe the most common teeth situated closely to the maxillary sinus.MATERIAL AND METHODS. The study was performed in 2020, in the ENT Department of “Sfanta Maria” Hospital, and was made based on computed tomography (CT) scans of the sinuses from the clinic’s archive. The image analysis was performed with a radiologic software. For each tooth, from both right and left upper hemiarcade, the distance between the dental root and the bony floor of the maxillary sinus was measured and the average distances were compared.RESULTS. Among the present teeth analysed, those with the closest distance were the 1st M (95.15% on the right side and 96.23% on the left side), then the second molars (96.08% on the right side and 90% on the left side). The 2nd and 3rd PM had a similar percentage of the sinusal approach, which varied between 82% and 86%.CONCLUSION. Knowing these dento-sinusal relationships, there is a win-win situation for both the ENT doctor and the dentist. The paraclinical examination necessary for the analysis of the dento-alveolo-sinusal relation and of the afferent pathology is the imaging one, of choice being the CT and CBCT scans.

Three-dimensional evaluation of maxillary sinus volume following the use of different designs of rapid maxillary expander

“…Some researchers concluded a limited effect or even questioned such effects. [19,20] Through the use of CBCT 3D imaging, the maxillary sinus anatomy may be accurately analysed, allowing for the observation of anatomical details that are difficult to analyse while using the two-dimensional panoramic view [13].…”

“…The maxillary sinus floor (MSF), which can be above, below, in contact with, or between the roots of the maxillary first molars, has a varied relationship to the apical region of these teeth. This variable locations could be crucial during molar intrusion [12,13].…”