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your web page. Facial and Paranasal Sinuses
Which sinuses are demonstrated with a Parietoacanthial projection?Frontal sinuses and the anterior ethmoidal sinuses. When positioning the sinuses for the Parietoacanthial Projection, Waters Method, in order to project the petrous portion of the temporal bone below the maxillary sinus floors, what must be true? The OML forms a 37° angle with the IR plane.
Which sinuses are visualized through the open mouth?The Waters view (see the image below) shows the maxillary antra clearly. The frontal sinus is projected obliquely, and the ethmoid air cells are obscured, although a few may be seen along the medial walls of the orbit and within the nose. The sphenoid sinus is seen through the open mouth.
What sinus group is demonstrated through the mouth on the open mouthed Parietoacanthial waters projection?-The parietoacanthal (Waters method) projection demonstrates the maxillary sinuses. The modified Waters position, with the CR directed through the open mouth, will demonstrate the sphenoid sinuses through the open mouth.
Which sinuses are best demonstrated with a Parietoacanthial projection group of answer choices?A radiograph of a parietoacanthial (Waters) projection for sinuses reveals that the petrous pyramids are projected over the maxillary sinuses.
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