National Dental Examining Board of Canada (NDEB) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Master your National Dental Examining Board of Canada (NDEB) exams with our comprehensive practice guide. Achieve excellence in your dental certification with expertly crafted questions and detailed explanations.

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.