If the lower teeth cover one or more upper teeth when your mouth is closed, it is described as a crossbite. Crossbites, or malocclusions are an irregularity in your teeth alignment and, if left untreated, can cause complications and painful symptoms like jaw pain, headaches, tooth decay. Treatment for crossbites depends on the nature and degree of the issue, and our Orthodontist will recommend a treatment plan after evaluating the patient. This includes the use of an appliance called a dental “expander.” The expander is widened during the first 1-2 months to expand the jaw, and typically worn for an additional three months to allow the jaw to harden in its new place. Dental braces are sometimes used in conjunction with an expander or are placed after the expander is removed.