What does “Posterior teeth” mean?
Posterior teeth are the teeth toward the back of the mouth that crush and grind food. They are generally described as premolars and molars.
Premolars and molars
In the permanent dentition, premolars sit between the canines and molars, with the molars farther back. The chewing surfaces of posterior teeth are shaped to crush and grind food.
Primary and permanent posterior teeth
Permanent premolars replace primary molars. Permanent molars erupt behind the primary dental arch as additional teeth. A new permanent molar should not be mistaken for a primary tooth simply because no primary tooth fell out before it appeared.
Grooves on the chewing surface
The pits and grooves of posterior teeth can trap food and bacteria. Brush with fluoride toothpaste and ask whether preventive measures such as sealants are appropriate, particularly for newly erupted permanent molars.
Frequently Asked Questions
Is the rearmost tooth always a wisdom tooth?
Wisdom teeth are third molars. They may not have erupted or may be absent, so being the last visible tooth does not by itself identify a wisdom tooth.
Do all of a child's back teeth fall out and get replaced?
Primary molars are replaced, but the permanent molars that erupt behind them are not primary teeth awaiting replacement. A dental examination can identify which teeth are present.
Understanding posterior teeth
Learn what the term means and how it relates to your dental condition.
- Sufficient understanding
Is the tooth a primary or permanent posterior tooth?
Explanation and evidenceDistinguish a new tooth erupting behind the primary arch from one replacing a primary tooth.
Australian Dental Association · Tooth anatomy - Care after treatment
Are the grooves on the chewing surfaces being cared for?
Explanation and evidenceNarrow grooves can be difficult to keep clean. Use fluoride toothpaste and discuss sealants when appropriate.
National Institute of Dental and Craniofacial Research · Dental Sealants
