Quadrant (Dental)

In dentistry, a quadrant is one of the four anatomical sections of the mouth: upper right, upper left, lower right and lower left. Each quadrant typically contains the same sequence of tooth types (incisors, canines, premolars and molars) and is a practical way to locate and record findings on dental charts for both adults and children, although the exact tooth count can differ if teeth such as wisdom teeth are missing.

Clinicians use quadrant terminology for diagnosis, treatment planning and scheduling—for example, to describe where a filling, extraction, root canal or periodontal treatment will be performed. Saying a procedure will be done in a particular quadrant helps clarify which teeth are involved and can guide phased treatment approaches that make appointments and recovery more efficient for patients.