The human jaw can exert 171 pounds of force, which means your teeth must be strong to withstand the pressure. Thankfully, your enamel is the hardest substance in your body. The hard outer layer you see when you look in the mirror is responsible for protecting the softer inner layers, called the dentin and pulp. Although your enamel is resilient, it isn’t indestructible. Enamel wear is a serious problem that must be addressed because it can’t repair itself on its own. Here are the signs you need to watch out for to safeguard your smile from irreversible damage.