The maxillary sinus and the posterior teeth share a complex anatomical relationship that is pivotal for several dental procedures. Recent advances in imaging modalities, particularly cone‐beam ...

About 46.6% of the teeth showed a periapical pathology associated with an inflammatory reaction of the maxillary sinus. Among them, thickening of the maxillary sinus mucosa > 3 mm is the most common ...

The upper teeth are closest to the maxillary sinuses (located inside the cheekbones) and infection in the maxillary sinus can be a possible cause of a toothache.