Teeth are supposed to last for a lifetime, but 120 million Americans are missing at least one tooth. Your toothbrush is the most important tool you have at home to protect your pearly whites from preventable issues that can lead to tooth loss, like cavities and gum disease. However, if you push too hard when brushing your teeth, it can cause irreversible damage to your smile. Aggressive brushing doesn’t lead to a better clean. Instead, here are the risks you’ll face if you don’t break the habit.