Oral cavity is divided in two major arches and each of these arches are divided into 2 Quadrants each.

The dental archs are divided into 4 Quadrants:

Maxillary Quadrants:

Right Maxillary Quadrant ( I )

Left Maxillary Quadrant  ( II )

Mandibular Quadrants:

Left Mandibular Quadrant ( III )

Right Mandibular Quadrant  ( IV )

Each Quadrant has 8 teeth- 3 anterior & 5 posterior teeth.

The Quadrants are divided by an Imaginary line which passes through the central Incissors of both the maxillary and mandibular arches

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