# A bony opening in the canine fossa is commonly used to:
A. Enter the maxillary sinus
B. Establish drainage of an alveolar abscess
C. Remove mandibular third molars
D. Uncover and marsupialize a cyst
The correct answer is A. Enter the maxillary sinus.
The wall of the sinus is very thin in this area. This area is used for following: (i) Diagnostic aspiration, and (ii) The site for Caldwell-Luc operation; that is, the antral exploration with or without an intraoral antrostomy.
Reference: Textbook of Oral and Maxillofacial Surgery, Third Edition, Neelima Anil Malik, Page no. 639
