An overbite is when your upper jaw overlaps your lower jaw. It is common for some patients to have a slight overbite of just one or two millimeters, but others have more serious bite issues. A malocclusion or deep overbite is when the overlap between the upper and lower teeth is more pronounced
Crossbite is a form of malocclusion where a
tooth (or teeth) has a more buccal or lingual position (that is, the
tooth is either closer to the cheek or to the tongue) than its
corresponding antagonist tooth in the upper or lower dental arch. In
other words, crossbite is a lateral misalignment of the dental arches.