for each teeth contact there are 4 embrassures.
Embrasures
* Open space
* Spillways
* Named for their location
o Names:
+ Facial (buccal or labial)
+ Lingual
+ Incisal or occlusal
+ Gingival/Cervical (if interproximal space not occupied by tissue or bone)
* Function
o Allow food to be forced away from contact areas
o Reduce the forces of occlusal forces
o Self-cleansing
o Permit a slight amount of stimulation to the gingiva