Malocclusions | Types of Misaligned Teeth

An overbite is when a child's top teeth overlap their bottom teeth. While almost every child has at least a bit of an overbite (1-3 mm), which is normal, there are some children who have a more severe overlap. It's considered an excessive overbite when a child's top teeth overlap their bottom teeth by 3-9 mm, or more.

Underbites occur when the lower row of teeth significantly overlaps the upper row. This is less common than overbites; however, the issue involves the same chewing complications, speech impediments, and jaw soreness that overbites do. In an underbite, your child's chin is often pressed forward.

A crossbite occurs when the upper jaw is too narrow for the lower jaw. When this happens, the upper teeth sit inside the lower teeth. The opposite can also occur where the lower jaw may be too small for the upper jaw. Either way, a crossbite can occur on either the left or right side of the mouth or on both sides.

An open bite is when the upper and lower teeth do not touch when the mouth is at rest. This can happen on either side of the mouth but is most common with the front teeth. Open bites are quite rare. One study discovered that they are the least prevalent type of misalignment.

In an ideal alignment of teeth, there is the right amount of space for the teeth to erupt without crowding or leaving gaps. The top teeth should hang slightly over the bottom teeth, with all the teeth lining up comfortably when biting down; however, this does not occur with dental crowding.

Having gapped teeth can be the result of a size difference between your teeth and jaw, gum disease, missing teeth, or improper habits such as thumb sucking. Whether you have a small or large gap between your teeth, our orthodontist can provide insight on which treatment can close the gap.