At a glance
- An underbite occurs when the lower front teeth and jaw protrude further forward than the upper front teeth, creating the opposite relationship to a normal bite where the upper teeth slightly overlap the lower ones.
- An underbite can affect chewing efficiency, since the front teeth do not meet in the ideal position for biting into food, and some patients also experience speech difficulties, particularly with certain consonant sounds.
- When an underbite is identified early in a growing child, interceptive treatment using appliances designed to modify jaw growth can sometimes achieve significant improvement while the bones are still developing.
- In adults whose jaw growth is complete, mild underbites involving primarily dental rather than skeletal discrepancy can sometimes be managed with braces or aligners combined with elastics to help improve the bite relationship.
What Is an Underbite
An underbite occurs when the lower front teeth and jaw protrude further forward than the upper front teeth, creating the opposite relationship to a normal bite where the upper teeth slightly overlap the lower ones. This condition can range from mild, involving just a few teeth, to severe, where the entire lower jaw is positioned significantly forward relative to the upper jaw.
Underbites are often primarily skeletal in origin, meaning the underlying jaw bones themselves have grown in a mismatched proportion, though dental factors such as individual tooth position can also contribute to milder cases. Genetics play a significant role in underbite development, and it is common to see this trait run in families.
Functional and Aesthetic Impact
An underbite can affect chewing efficiency, since the front teeth do not meet in the ideal position for biting into food, and some patients also experience speech difficulties, particularly with certain consonant sounds. The uneven bite relationship can also lead to excessive wear on specific teeth over time as they compensate for the misalignment during normal function.
Beyond functional concerns, a pronounced underbite can affect facial profile and self-confidence for some individuals, particularly when the lower jaw is significantly more prominent than the upper jaw and midface. Addressing these concerns often requires a combined understanding of both the dental and skeletal components involved.
Treatment for Children and Growing Patients
When an underbite is identified early in a growing child, interceptive treatment using appliances designed to modify jaw growth can sometimes achieve significant improvement while the bones are still developing. This early approach takes advantage of the growth potential present in childhood and can reduce the severity of any treatment needed in later years.
Regular monitoring throughout childhood and adolescence allows the orthodontic team to track jaw growth patterns and intervene at the optimal time, since underbite correction tends to be more straightforward the earlier it is addressed during the growth period.
Treatment Options for Adults
In adults whose jaw growth is complete, mild underbites involving primarily dental rather than skeletal discrepancy can sometimes be managed with braces or aligners combined with elastics to help improve the bite relationship. However, more significant skeletal underbites in adults often require orthognathic, or corrective jaw, surgery performed in conjunction with orthodontic treatment to achieve a stable, functional, and balanced result.
This combined surgical-orthodontic approach typically involves an initial phase of braces to align the teeth in preparation for surgery, followed by the surgical repositioning of the jaw, and a further period of orthodontic refinement afterwards. While this is a more involved treatment pathway, it offers a comprehensive correction for patients with substantial skeletal discrepancies.
Questions patients ask us
- Can an underbite be corrected without jaw surgery?
- Mild underbites involving mainly tooth position rather than significant jaw discrepancy can sometimes be treated with braces or aligners alone. However, moderate to severe underbites with a genuine skeletal component in fully grown adults generally require corrective jaw surgery combined with orthodontic treatment for a stable result.
- Is early treatment important for children with an underbite?
- Yes, identifying an underbite early allows for interceptive treatment that can take advantage of a child's remaining jaw growth, potentially achieving significant improvement and reducing the extent of treatment needed later. Regular monitoring throughout childhood helps determine the best timing for intervention.
- What does jaw surgery for an underbite involve?
- Corrective jaw surgery typically involves repositioning the lower jaw, and sometimes the upper jaw as well, to achieve a balanced and functional bite relationship. This is performed by an oral and maxillofacial surgeon in coordination with your orthodontist, usually preceded and followed by phases of orthodontic treatment.
- Does an underbite run in families?
- Yes, underbites often have a hereditary component, with jaw size and shape being influenced significantly by genetics. If close family members have a similar bite pattern, it can be helpful to mention this during your consultation, as it may inform the assessment of your own case.
Sources and further reading
Guidance from professional and public health bodies. Clinical decisions here are made on your own examination and radiographs.
- 1.Orthodontic treatment and retention — patient resources — American Association of Orthodontists
- 2.Patient information leaflets on appliances and retention — British Orthodontic Society
- 3.Oral health — fact sheet and global status report — World Health Organization
- 4.Policy statements and oral health definitions — FDI World Dental Federation
- 5.Dental health — conditions, treatments and patient guidance — NHS (UK)
- 6.Systematic reviews of oral and dental interventions — Cochrane Oral Health
- 7.Regulatory framework and dental education standards in India — Dental Council of India
When to see us
Get examined without waiting if any of the following applies to you:
- A broken bracket, poking wire or appliance causing ulceration
- A tooth that becomes painful, loose or discoloured during treatment
- Jaw joint pain, locking or a bite that has changed suddenly
Get a written plan and cost before you commit
If this is what you are dealing with, the next step is a consultation with radiographs — orthodontics cases are seen by the specialist who handles that field. You get a written plan and staged cost before anything begins.
reception@dramitsharmahospital.comThis article is general education and does not replace an in-person examination, radiographs or a diagnosis by a qualified dentist.
Clinical terms in this article
Related in Orthodontics
Aligners and Braces: Choosing the Right Option
Metal, ceramic and clear aligner treatment compared, duration, visibility, cost and suitability.
Tooth Extraction for Braces or Severe Crowding Issues
Orthodontic extractions involve the planned removal of select teeth to resolve severe crowding, correct bimaxillary protrusion, and balance dentoalveolar proportions. This clinical guide details diagnostic indications, extraction patterns, procedural steps, recovery, risks, and evidence-based non-extraction alternatives.
Maxillary Osteotomy for Open Bite Alignment and Correction
Maxillary osteotomy for open bite corrects severe vertical skeletal discrepancies through surgical repositioning of the upper jaw. Combined with orthodontics, this procedure restores chewing function, improves speech articulation, and ensures long-term occlusal and facial stability.
Surgically Assisted Rapid Palatal Expansion for Adult Palate Widening
Surgically assisted rapid palatal expansion (SARPE) is a combined orthodontic and surgical treatment designed to correct severe transverse maxillary deficiency in skeletally mature adults, widening the narrow upper jaw to restore functional occlusion, stability, and airway volume.
Surgical Exposure and Bracket Bonding for Impacted Canine Teeth
This clinical guide details impacted canine exposure surgery and bracket bonding. It explains anatomical causes, CBCT diagnostic pathways, open versus closed surgical techniques, orthodontic traction mechanisms, recovery protocols, and evidence-based strategies to manage complications.
Overbite vs Overjet: Key Differences and Correction Methods
This clinical guide clarifies the distinction between overbite (vertical overlap) and overjet (horizontal protrusion). It examines their aetiology, diagnostic pathways, classification, and evidence-based orthodontic and surgical correction methods across paediatric and adult populations.