Which technique is described as open-mouth Waters method?

Which technique is described as open-mouth Waters method?

• A. Parietoacanthial projection
• B. Lateral projection
• C. PA projection
• D. AP projection

Answer: (A)

Open-mouth Waters method describes a parietoacanthial projection. The Waters view is a parietoacanthial projection used to image the facial bones and sinuses, and when the mouth is opened, it becomes the open-mouth Waters variation. In this position, the head is set so the face is oriented to place the parietoacanthial plane through the central rays, and the mouth opening helps separate structures (like the teeth) from the sinus region to reduce overlap, giving a clearer view of the maxillary sinuses along with other facial bones. The other projections—lateral, PA, and AP—are different views that do not use this specific parietoacanthial/Waters setup.

Open-mouth Waters method describes a parietoacanthial projection. The Waters view is a parietoacanthial projection used to image the facial bones and sinuses, and when the mouth is opened, it becomes the open-mouth Waters variation. In this position, the head is set so the face is oriented to place the parietoacanthial plane through the central rays, and the mouth opening helps separate structures (like the teeth) from the sinus region to reduce overlap, giving a clearer view of the maxillary sinuses along with other facial bones. The other projections—lateral, PA, and AP—are different views that do not use this specific parietoacanthial/Waters setup.