Overbite Teeth: Causes, Types & Treatment Options

In a normal bite, the upper front teeth overlap the lower front teeth slightly — usually by about 2 to 4 millimetres. This small overlap helps teeth bite and cut food efficiently and supports proper jaw function.

When the overlap is greater than normal, it’s known as an overbite. While mild overbites are common, more pronounced cases can lead to a range of dental and overall health concerns if left untreated.

An overbite is a type of malocclusion, meaning a misalignment of the teeth. It occurs when the upper teeth overlap the lower teeth more than they should.

A slight overbite is normal and essential for proper chewing. However, if the overlap exceeds 2 to 4 millimetres, it may be considered excessive and could affect oral health.

Symptoms and issues related to an overbite include:

Causes of overbite can be genetic or habit-related, such as thumb-sucking, prolonged pacifier use, teeth grinding, nail biting, or tongue thrusting.

A normal bite allows the upper teeth to slightly cover the lower teeth, creating an effective bite and healthy jaw function. The ideal overlap is about 2 to 4 millimetres.

In comparison, an overbite occurs when the upper teeth cover the lower teeth too much, sometimes causing the lower teeth to touch the roof of the mouth. Unlike a normal bite, an overbite can lead to enamel wear, jaw discomfort, or dental misalignment if not addressed.

An underbite is the opposite of an overbite. In this condition, the lower teeth protrude past the upper teeth.

Key differences:

While both are forms of malocclusion, they differ in the direction of misalignment and require different treatment approaches.

While an overbite describes a vertical misalignment (upper teeth overlapping lower teeth), an overjet refers to a horizontal misalignment, where the upper teeth stick out beyond the lower teeth.

Key points:

Although related, overbite and overjet are different forms of malocclusion, and treatment plans will vary based on the type and severity.

Treatment depends on the severity of the overbite and the patient’s age.

Early treatment reduces the risk of dental complications and can make the process simpler.

While genetics cannot be changed, parents can help prevent habit-related overbites in children by:

Adults and children living with an overbite should maintain good oral hygiene, use night guards if grinding occurs, and attend regular dental visits to monitor jaw and teeth health.