The maxillary sinus is located in which arch?

The maxillary sinus is located in which arch?

• A. Maxillary Arch
• B. Mandibular Arch
• C. Both Arches
• D. None

Answer: (A)

The maxillary sinus sits in the maxilla, the bone that forms the upper jaw. It is an air-filled cavity inside the body of the maxilla, located just above the roots of the upper teeth. Because the maxilla makes up the upper dental arch, the sinus is part of the maxillary arch. The mandibular arch, which contains the lower jaw, does not house a sinus, and there isn’t a sinus spanning both arches. On dental radiographs, you’ll often see the floor of the maxillary sinus near the apices of the upper molars, which is a clinically important relationship for procedures like extractions or evaluating sinus health. So the maxillary sinus is located in the upper jaw arch.

The maxillary sinus sits in the maxilla, the bone that forms the upper jaw. It is an air-filled cavity inside the body of the maxilla, located just above the roots of the upper teeth. Because the maxilla makes up the upper dental arch, the sinus is part of the maxillary arch. The mandibular arch, which contains the lower jaw, does not house a sinus, and there isn’t a sinus spanning both arches. On dental radiographs, you’ll often see the floor of the maxillary sinus near the apices of the upper molars, which is a clinically important relationship for procedures like extractions or evaluating sinus health. So the maxillary sinus is located in the upper jaw arch.