Incisors have a broad, chisel-like biting edge and a single root. Upper incisors are larger than lower incisors.
Canines :
Canine teeth are also called cuspid or eye teeth. They have one large pointed cusp and a very long single root.
Bicuspids :
These teeth (especially the upper ones) usually have two obvious cusps. Lower bicuspids just have one root. Upper ones can have one or two. Bicuspid teeth are also called premolars.
Molars :
The molars are the largest teeth in the mouth. They have four or five cusps on their chewing surface. Upper molars have three roots, lower ones just two.