Which of the following represents a non-chemical cause of dental erosion?

Dental erosion refers to the loss of tooth structure due to various factors. A non-chemical cause of dental erosion is grinding teeth, also known as bruxism. This mechanical action leads to wear and tear on the enamel, which can result in the thinning of the tooth structure over time.

Unlike the other options, which involve exposure to acids that chemically erode the enamel, grinding primarily inflicts physical damage. It produces wear patterns and can create grooves and indentations on the surface of the teeth, contributing to erosion independently of acid exposure. Addressing the underlying causes of bruxism, such as stress or misaligned teeth, is essential for preventing this type of enamel loss. Understanding this distinction helps clarify how different factors can lead to dental erosion and highlights the mechanical nature of the damage caused by grinding teeth.