MEDICINE
RADIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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canine fossa
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maxillary sinus
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zygomatic process
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zygoma
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Detailed explanation-1: -On a maxillary canine periapical image, the inverted Y appears as a radiopaque upside-down Y formed by the intersection of the lateral wall of the nasal fossa and the anterior border of the maxillary sinus.
Detailed explanation-2: -The term inverted Y refers to the intersection of the maxillary sinus and the nasal cavity/fossa, viewed on a maxillary canine dental image.
Detailed explanation-3: -Inverted Y – The inverted Y is a radiographic landmark that depicts where the nasal fossa crosses the maxillary sinus. The boundary between them is shaped like an upside-down letter Y, hence its name.
Detailed explanation-4: -Anterior nasal spine – a radiopaque V-shaped structure in the maxilla that intersects the floor of the nasal cavity and the nasal septum. External auditory meatus – a round radiolucent passage way to the ear (bilateral).
Detailed explanation-5: -The zygomatic bone can be seen on maxillary premolar and molar periapical images.