Which criteria justifies that MML was aligned perpendicular to the image receptor for the Water's method?
the petrous pyramids fill the lower one third of the maxillary sinuses
the petrous pyramids fall below the maxillary sinuses
the petrous pyramids fill the lower one third of the orbits
the petrous pyramids fill the orbits
the petrous pyramids fall below the maxillary sinuses
Rationale: A properly positioned Water's method raises the chin until the MML is perpendicular to the IR. If the MML is truly perpendicular, the petrous pyramids will drop below the level of maxillary sinuses.
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