Friday, December 12, 2014

Incisors, Canines, Premolars and Molars of Human: Comparison and differences

Incisors, Canines, Premolars and Molars of Human: Comparison and differences
 


Features
Incisors
Canines
Premolars
Molars
Number
8
4
8
12
Location
Central incisors are side by side at the midline.  There is a lateral incisor on each side of the central incisors
Next to the lateral incisors, establishes the cornering of the arches
First premolars are next to the canines followed by the second premolars
First molars are next to the second premolars, second molars next to the first molars and third molars next to the second molars.  The third molars are the farthest teeth in the mouth
Shape and structure
Single rooted, crowns are arched and angle toward one sharp incisal edge
Anchored with the longest root, one pointed cusp
Maxillary first premolars have a bifurcated root, all others have one root, one prominent cusp with one or two lesser lingual cusps
Bifurcated or trifurcated roots, broad chewing surfaces with four to five cusps
Function
For cutting or incising food
For holding, grasping, and tearing food.
For holding and crushing food
Grinding food

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