Tooth wear refers to the loss or damage that occurs on the surface of teeth due to various factors such as grinding, clenching, acid erosion, and abrasive wear. It can result in a decrease in tooth height, which may cause sensitivity, discomfort while eating, and an increased risk of dental decay or gum disease. Tooth wear is typically diagnosed through visual examination by a dentist, who will also assess the extent of damage and recommend appropriate treatment options such as fillings, crowns, or nightguards to prevent further wear.