Which type of tooth structure loss is caused by tooth-to-tooth contact, such as in bruxism or occlusal wear?

Attrition is the physiological or pathological wearing away of tooth structure through tooth-to-tooth contact during mastication, clenching, or bruxism. It affects the occlusal, incisal, and proximal surfaces, producing flat wear facets that often match opposing teeth. Erosion is caused by acid dissolution (from dietary acids or gastric acid). Abrasion results from mechanical wear by external agents (e.g., aggressive toothbrushing, abrasive toothpaste). Abfraction refers to stress-related cervical lesions caused by flexural forces during eccentric loading.