Crossbites

Comments: The clinical definition for a crossbite is "an abnormal relation of one or more teeth of one arch to the opposing tooth or teeth of the other arch, caused by deviation of tooth position or abnormal jaw position." But unless you're a health professional, this definition probably makes you say, "Huh?" In lay terms, a unilateral posterior crossbite is what occurs when your upper teeth fall inside your lower teeth on one side when you bite down. An anterior crossbite, which is similar to an underbite, is what occurs when your top front teeth fall behind your lower front teeth when you bite down.