Proximity of healthy posterior teeth to the maxillary sinus floor in relation to mucosal thickening: a CBCT study

Objectives To evaluate the relationship between proximity of the root apices of healthy maxillary posterior teeth to the maxillary sinus floor (MSF) and mucosal thickening (MT) of the MSF using cone beam computed tomography (CBCT). Methods Eighty-four CBCT images obtained from the patients, aged between 20 and 70 years with healthy and fully dentate maxillary posterior sextants, were included. The anatomical relationship between root apices of maxillary posterior teeth and MSF, was evaluated: (Type 1: no contact, Type 2: at least one root apex in contact, Type 3: at least one root apex protruding into MSF). Besides, MT of the MSF was measured from the thickest region. The patients were categorized into two groups based on the absence (≤ 2 mm) or the presence (2