Difference Between Overbite and Underbite
What Is the Difference Between an Overbite and an Underbite? An overbite occurs when the upper teeth or dental arch overlaps significantly over the lower teeth, while an underbite is the opposite — the lower teeth protrude in front of the upper arch. Both are forms of malocclusion (misaligned bite) that can affect your oral health, jaw function, and facial appearance. A licensed dentist can assess the severity of either condition and recommend the most appropriate treatment. Understanding Overbite A small degree of overbite is completely normal — in fact, most people have a slight vertical overlap of the upper front teeth over the lower. However, when the overlap becomes excessive, it is considered a dental concern that may require treatment. Common Causes of Overbite Genetics: Overbites are frequently inherited from parents and may relate to the size or shape of the jaw and teeth. Childhood habits: Prolonged thumb sucking, extended use of a bottle or pacifier, and tongue thrusting during developmental years can all contribute to overbite formation. Jaw development: Discrepancies in upper and lower jaw growth can result in significant overlap. Health Effects of an Overbite Difficulty chewing or biting food properly Increased stress on the jaw joint (temporomandibular joint), which may lead to TMJ-related discomfort Accelerated wear on tooth enamel Speech difficulties in some cases Aesthetic concerns affecting facial profile and self-confidence Understanding Underbite An underbite occurs when the lower teeth sit in front of the upper teeth when the mouth is closed. This condition is typically caused by overgrowth of the lower jaw, undergrowth of the upper jaw, or a combination of both. Like overbite, underbite can run in families. Common Causes of Underbite Genetics: Jaw size and growth patterns are often hereditary. Childhood habits: Similar habits to those linked with overbite — such as thumb sucking, tongue thrusting, and prolonged pacifier use — can also contribute. Jaw discrepancy: Overgrowth of the lower jaw or undergrowth of the upper jaw are the most common skeletal causes. Health Effects of an Underbite Difficulty chewing and biting effectively Increased risk of tooth decay, cavities, and gingivitis — because misaligned teeth make it harder for a toothbrush to reach all surfaces Jaw pain and potential TMJ dysfunction Speech impediments Uneven wear on the teeth over time Because misaligned teeth create hard-to-clean areas, patients with either overbite or underbite benefit greatly from regular professional cleanings. Our dental hygienist team in Calgary can help manage plaque build-up and monitor your oral health between orthodontic treatments. How Are Overbite and Underbite Treated? While misaligned teeth are often visually apparent, it is strongly recommended that you visit a licensed dentist for a thorough assessment before beginning any treatment. The right approach depends on the severity of the malocclusion, your age, and your overall dental health. Common Treatment Options Orthodontic treatment: Braces or clear aligners such as Invisalign in Calgary NW are among the most effective non-surgical options for correcting mild to moderate overbite and underbite. Dental appliances: Palate expanders and other orthodontic appliances…