National Dental Examining Board of Canada (NDEB) Practice Exam

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Prepare for the National Dental Examining Board of Canada (NDEB) Test. Study with flashcards and multiple choice questions, each question offers hints and detailed explanations. Achieve success in your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What anatomical structures make up the inverted Y in maxillary PA?

Floor of nasal fossa and maxillary sinus border
Maxillary sinus and zygomatic arch
Floor of nasal fossa and palatine process
Maxillary sinus border and palatine process

The correct answer is: Floor of nasal fossa and maxillary sinus border

The inverted Y seen on a maxillary PA is formed by the borders of the floor of the nasal fossa and the medial wall of the maxillary sinus. This specific angle allows for better visualization of the maxillary sinus and its relationship to the adjacent structures. The other options, while they do involve the maxillary sinus and neighboring structures, do not accurately describe the specific formation of the inverted Y on a maxillary PA. Therefore, they are incorrect.