What sinus is most commonly affected by dental infections?

The maxillary sinus is most commonly affected by dental infections due to its anatomical proximity to the upper teeth, particularly the molars and premolars. Infections from the roots of these teeth can easily spread to the maxillary sinus because of their close relationship. The roots of the maxillary molars often extend into the floor of the maxillary sinus, which provides a pathway for bacteria to travel from the infected dental site into the sinus cavity.

Infections originating in the maxillary sinus can lead to sinusitis, which may present symptoms such as facial pain, swelling, and nasal congestion. This connection is significant for clinicians to consider when evaluating patients with dental-related complaints, as they may need to assess for sinus involvement and manage both the dental infection and any potential sinus issues simultaneously.

Other sinuses have different relationships with the teeth; for instance, the frontal, ethmoid, and sphenoid sinuses are less susceptible to infection originating from dental issues because they are located in different regions of the skull and are not as directly associated with the roots of the teeth.