Which projection best visualizes the maxillary sinus floor?

Which projection best visualizes the maxillary sinus floor?

• A. Lateral skull projection
• B. Panoramic radiograph
• C. Cephalometric projection
• D. Waters (occipitomental II) projection

Answer: (D)

Visualizing the floor of the maxillary sinus is best achieved with a parietoacanthial (Waters) view. This positioning places the maxillary sinuses in a plane that minimizes overlap from surrounding structures and brings the sinus floor into clear view. In this projection, the head is positioned so that the facial bones align to place the maxillary sinuses just above the imaging plane while the petrous pyramids are projected below them, reducing superimposition. The result is a sharp, unobscured view of the floor that makes it easier to detect conditions like sinusitis, fractures, or lesions. Other projections don’t offer the same direct view of the floor: a lateral skull projection shows the sinus in profile but not the floor in detail; panoramic radiographs provide a broad view with potential distortions and tooth overlap; cephalometric projections focus on skeletal relationships rather than detailed sinus anatomy.

Visualizing the floor of the maxillary sinus is best achieved with a parietoacanthial (Waters) view. This positioning places the maxillary sinuses in a plane that minimizes overlap from surrounding structures and brings the sinus floor into clear view. In this projection, the head is positioned so that the facial bones align to place the maxillary sinuses just above the imaging plane while the petrous pyramids are projected below them, reducing superimposition. The result is a sharp, unobscured view of the floor that makes it easier to detect conditions like sinusitis, fractures, or lesions.

Other projections don’t offer the same direct view of the floor: a lateral skull projection shows the sinus in profile but not the floor in detail; panoramic radiographs provide a broad view with potential distortions and tooth overlap; cephalometric projections focus on skeletal relationships rather than detailed sinus anatomy.