In its classic form, serial extraction is best applied to patients with Class I occlusions with crowding of

less than 10mm in each of the upper and lower arches and 70% overbite

10mm or more in each of the upper and lower arches and 35% overbite.

less than 10mm in each of the uppeand lower arches and 35% overbite.

10mm or more in each of the upper and lower arches and 70% overbite.