Buck teeth are upper front teeth that visibly protrude outward, sitting well ahead of the lower teeth. The dental term for this is “overjet,” a horizontal misalignment between the upper and lower front teeth. It’s one of the most common orthodontic issues worldwide, with studies across different populations finding increased overjet in anywhere from 12% to 63% of people examined.
While many people use “buck teeth” and “overbite” interchangeably, they’re actually two different conditions. An overbite (also called a deep bite) is a vertical problem where the upper teeth overlap too far down over the lower teeth. An overjet is a horizontal problem where the upper teeth jut forward. You can have one, the other, or both at the same time.
What Causes Buck Teeth
The two biggest factors are genetics and childhood habits. If your jaw structure runs in the family, meaning a naturally smaller lower jaw or a larger upper jaw, the front teeth may end up sitting further forward simply because of how the bones grew. Crowding also plays a role: when teeth don’t have enough room, they can push forward as they erupt.
Childhood habits are the other major driver. Prolonged thumb sucking, pacifier use, and tongue thrusting (pushing the tongue against the front teeth when swallowing) all put steady outward pressure on developing teeth and bone. The critical age threshold is around three years old. Children who stop pacifier use before age three show substantially lower rates of bite problems, while those who continue past three see a sharp increase. One study found that open bite prevalence jumped from about 19% in children who used pacifiers before age three to 65% in those who continued beyond that age. The American Academy of Pediatric Dentistry recommends discontinuing pacifier use by three for exactly this reason.
How Buck Teeth Affect Daily Life
Mild overjet is largely cosmetic. But as the gap between upper and lower teeth grows, practical problems start to stack up. The most noticeable is difficulty closing your lips completely, which can lead to dry mouth and make breathing through the nose feel less natural. People with significant overjet often bite the inside of their cheeks or tongue accidentally, causing recurring ulcers and sore spots.
Chewing becomes less efficient when front teeth don’t meet properly, and that misalignment puts extra stress on the jaw joint. Over time, this can lead to jaw pain, facial pain, chronic headaches, and TMJ disorder, a condition where the joint connecting your jaw to your skull becomes inflamed or damaged. Speech challenges, particularly with certain sounds that require the tongue to touch the back of the front teeth, are less common but do occur.
There’s also a less obvious consequence: hygiene. When teeth are crowded or angled outward, brushing and flossing thoroughly gets harder. The areas that are difficult to reach become breeding grounds for cavities and gum disease. Protruding teeth are also more vulnerable to injury during falls or contact sports, since they’re the first point of impact.
Treatment for Mild to Moderate Cases
Most overjet cases can be corrected with standard orthodontic treatment. Traditional metal braces, ceramic braces, and clear plastic aligners all work by applying gradual, steady pressure to shift teeth back into proper alignment over months or years. Your orthodontist adjusts the hardware at regular intervals to keep the movement on track.
For children, treatment often starts earlier and may include a palate expander, a device that widens the upper jaw to create more room for teeth. Starting treatment while the jaw is still growing gives orthodontists more to work with, since they can guide bone development rather than just move teeth. The American Association of Orthodontists recommends children have their first orthodontic screening by age seven. That doesn’t mean braces at seven. It means catching potential problems early enough that treatment, if needed, can be simpler and less invasive.
When Surgery Becomes Necessary
For severe cases, especially in adults whose jaws have stopped growing, braces alone may not be enough. When the problem is skeletal, meaning the jaw bones themselves are misaligned rather than just the teeth, orthodontic treatment can reposition teeth to partially camouflage the discrepancy, but there are limits to how much tooth movement can compensate for bone structure.
Jaw surgery (orthognathic surgery) repositions the upper jaw, lower jaw, or both to correct the underlying skeletal imbalance. Age is one of the strongest factors in whether surgery is recommended. Adolescents still have growth potential that orthodontists can harness, while older patients with severe misalignment have fewer nonsurgical options. The decision isn’t always clear-cut: research shows considerable overlap between patients treated surgically and those treated with orthodontics alone, and the exact threshold for recommending surgery varies between practitioners.
Recovery from jaw surgery typically involves several weeks of a soft or liquid diet, swelling that takes months to fully resolve, and a period of orthodontic treatment before and after the procedure to fine-tune tooth positioning. It’s a significant commitment, but for people with severe skeletal discrepancies causing pain, difficulty eating, or breathing issues, it addresses the root problem in a way braces cannot.
What to Expect From Correction
Treatment timelines vary widely depending on severity and the approach used. Braces or aligners for a moderate overjet typically take 12 to 24 months. Cases that involve palate expansion or phased treatment in children may span longer when you account for waiting periods between phases. Surgical cases add several months of recovery on top of the orthodontic timeline.
After active treatment, retainers are essential. Teeth have a natural tendency to drift back toward their original positions, particularly in the first year or two. Most orthodontists prescribe a retainer to be worn full-time initially, then at night long-term. Skipping retainer wear is the single most common reason people end up needing a second round of treatment years later.