Underbite Treatment UK

Clear aligners can treat mild dental underbites where the lower front teeth are positioned slightly too far forward relative to the upper, but the jaw relationship is broadly acceptable. In these cases, aligners can retract the lower front teeth or advance the upper teeth to improve the relationship. Skeletal underbites — where the lower jaw itself is the primary cause — are typically not well managed by aligners alone and often require fixed braces, especially in adults where jaw growth is complete.

Jaw size and position patterns tend to run in families, so there is a significant hereditary component to skeletal underbites. If a parent or grandparent had a strong lower jaw or prominent chin, similar features may appear in children. Dental underbites — where tooth position rather than jaw size is the cause — also have some familial tendency but are more amenable to orthodontic correction without surgical involvement. A specialist assessment will identify whether your underbite is primarily dental or skeletal in origin.

Underbite correction can meaningfully change the lower face appearance. Reducing a prominent lower jaw or bringing the upper teeth forward can alter the lip relationship and profile. In cases treated with braces alone, changes are more modest. In cases requiring orthognathic surgery, the profile changes can be significant — improving the chin projection, lip support, and overall facial balance. Many patients seek treatment partly for aesthetic reasons alongside the functional benefits of a corrected bite.

Treatment timelines for underbite vary considerably by case type. A mild dental underbite treated with braces or aligners may be corrected in 12–18 months. More complex dental underbites can take 18–24 months. Skeletal underbites requiring surgical correction involve pre-surgical orthodontic preparation (typically 12–18 months), the surgery itself, and post-surgical orthodontics (6–12 months), making the total timeline 24–36 months or more. A specialist orthodontist will give a realistic estimate after a full clinical records assessment.

Underbites can be dental — where the lower front teeth are positioned too far forward relative to the upper — or skeletal, where the lower jaw itself is larger or more forward than the upper jaw. Skeletal underbites are often hereditary and tend to become more apparent during teenage growth. Dental underbites may be related to tooth positioning and are more amenable to orthodontic correction alone.

Not always. Mild-to-moderate dental underbites can often be corrected with braces or aligners alone, particularly in growing patients. Significant skeletal underbites in adults — where the jaw itself is the primary cause — often need a combination of orthodontic treatment and orthognathic jaw surgery for the most stable and comprehensive correction. A specialist orthodontist can assess whether surgical intervention is likely after a full examination.

Dental underbites that meet the IOTN grade 4 or 5 threshold can be treated on the NHS for under-18s in England. Skeletal underbites requiring jaw surgery (orthognathic surgery) may be eligible for NHS combined orthodontic-surgical treatment at any age if the functional need is clinically significant — this is one of the few situations where adults can access NHS orthodontic care. Your dentist can assess and make a referral for eligible cases; adult patients with a skeletal underbite should ask specifically about an orthognathic pathway rather than a standard orthodontic referral.