Plate VI 



Trephining of Facial Sinuses. 



Frontal view of right side of face with sinuses 

 exposed. SM, superior maxillary sinus ; IM^, 

 median portion of inferior maxillary sinus ; IM, 

 lateral portion of inferior maxillary sinus ; F, 

 frontal sinus ; FE, communication between the 

 frontal and superior maxillary sinuses. 



