A patient describes a bilateral white line running along the buccal mucosa at the level of the occlusal plane. What is this finding called?

Linea alba ('white line') is a benign, raised, hyperkeratotic white line on the buccal mucosa at the occlusal plane caused by chronic frictional trauma/suction from the teeth. It requires no treatment beyond reassurance and habit modification (if related to cheek biting/sucking).