canine fossa canine fossa in the musculoskeletal anatomy of the human head, lateral to the incisive fossa of the maxilla is a depression called the canine fossa. it is larger and deeper than the comparable incisive fossa, and is separated from it by a vertical ridge, the canine eminence, corresponding to the socket of the canine tooth; canine fossaleft maxilla. outer surface.detailsidentifierslatinfossa caninata98a05.1.03.061 a02.1.12.009ta2764fma56762anatomical terms of bone