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Which anatomical structures form the inverted Y (Y line) in maxillary periapical radiographs?
Floor of the nasal fossa and maxillary sinus border
Zygomatic process of the maxilla and maxillary sinus border.
Anterior nasal spine and nasopalatine/incisive canal.
Nasopalatine/incisive canal and floor of the nasal fossa.
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