Wedged cervical lesions produced by toothbrushing.

Purpose: To compare the morphology of experimentally induced cervical toothbrush abrasion lesions to teeth demonstrating non-carious cervical lesions in vivo.

Methods: Eighteen premolars extracted for orthodontic reasons were each subjected to 80 hours (1.4 million strokes) of horizontal brushing in a custom fabricated toothbrushing machine.

Noncarious cervical lesions and abfractions: a re-evaluation.

Background: The concept of abfraction is controversial. The authors present the fundamental basis of abfraction and review studies that describe the condition.

Types Of Studies Reviewed: The authors used data on masticatory forces, enamel and dentin properties, as well as stress studies related to abfraction, for background information.