Where can you find the Sinus?

Where can you find the Sinus?

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

Answer: (A)

The sinus in dental radiography is the maxillary sinus, which sits inside the maxilla—the upper jaw. It lies just above the roots of the upper teeth, so you’d look for it in the region of the maxillary arch on X-rays. The mandible (lower jaw) doesn’t contain this sinus, and there are usually two maxillary sinuses, one on each side. On a panoramic or upper-teeth radiograph, this space appears as a distinct radiolucent area above the roots of the upper molars and premolars. That’s why the sinus is found in the maxillary arch.

The sinus in dental radiography is the maxillary sinus, which sits inside the maxilla—the upper jaw. It lies just above the roots of the upper teeth, so you’d look for it in the region of the maxillary arch on X-rays. The mandible (lower jaw) doesn’t contain this sinus, and there are usually two maxillary sinuses, one on each side. On a panoramic or upper-teeth radiograph, this space appears as a distinct radiolucent area above the roots of the upper molars and premolars. That’s why the sinus is found in the maxillary arch.