Fig.13 is a CBCT sagittal section (5 mm) of a 52 year-old lady.  It shows that the apex of the the upper left canine (#11) is located in a septal bone between the nasal cavity (N) and the maxillary sinus (S). 

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Xin Wei, DDS, PhD, MS 1st edition 12/19/2015, last revision 02/03/2019