Which type of tooth loss results from mechanical wear and tear?

Attrition refers to the natural process of tooth wear that occurs due to the grinding of teeth against each other, commonly seen in individuals who grind their teeth (bruxism) or in those with a misaligned bite. This mechanical wear and tear involve the loss of tooth structure due to the friction generated during chewing or clenching, leading to a gradual reduction in the enamel of the teeth.

In contrast, abrasion involves tooth wear caused by external forces, such as aggressive brushing or using abrasive substances. Abfraction is the loss of tooth structure at the gumline, primarily caused by flexural forces during biting and clenching, leading to microfractures. Erosion occurs due to chemical processes, such as acid exposure, rather than mechanical forces. Understanding that attrition is specifically linked to the mechanical interactions between teeth helps clarify why it is the most appropriate choice for this question.