Orthodontics
Overjet
The horizontal distance the upper front teeth project beyond the lower front teeth.
Overjet is measured horizontally, with the upper incisors normally sitting 2–3 mm in front of the lowers when the back teeth are in contact. It is often confused with overbite, which is the vertical overlap of the same teeth. Excessive overjet — sometimes loosely called "buck teeth" — can result from thumb-sucking, tongue thrust, or skeletal discrepancies between the upper and lower jaws. It increases the risk of trauma to the upper incisors and can affect speech and facial aesthetics. Treatment options include orthodontic appliances, growth modification in children, or jaw surgery for severe skeletal cases.