Heavy occlusal forces that repetitively flex the tooth structure over time, like bruxism, can cause cervical loss of tooth structure.16 This process, known as abfraction, produces deep, narrow, wedge-shaped defects on the buccocervical aspect of the teeth.7,16 It usually involves a single premolar or molar tooth with the adjacent teeth remaining unaffected.7,16 These defects can mimic abrasion, erosion, and cervical caries but solitary tooth involvement and subgingival defect occurrence can help differentiate abfraction from the other entities.16
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