Uneven or Asymmetric Teeth: Levelling the Smile Line
For adults whose front teeth look uneven, wonky, different lengths or lopsided: what uneven means, whether the cause is the teeth, gum line or position, options at each level, what one visit can change, fee list prices and common questions. The core point: the level decides the fix.
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Clinically reviewed by Dr Ibraheem Ijaz, dentist · GDC 301711
Medical disclaimer: This page is for general information only. It does not replace an examination or treatment by a dentist.
This page was reviewed by Dr Ibraheem Ijaz, a General Dental Practitioner and the practice's principal dentist.
What do people mean by uneven teeth?
Uneven teeth usually means front teeth of different lengths, edges out of line, a gum line higher on one side or an off-centre smile. Dentists call this dental asymmetry. A 2014 review of smile aesthetics assesses it through features including these, stressing that ideals vary between people:
- Incisal edge position: where the biting edges sit. In the review's ideal smile line, or smile arc, the upper edges follow the lower lip.
- Midline: the line between the two upper front teeth, compared with the centre of the face.
- Gingival zenith: the highest point of the gum around each tooth, at or slightly beside its centre.
- Tooth proportion: each tooth's width against its length, and against its neighbours.
In a 2025 eye-tracking study of 195 dental professionals and laypeople viewing altered close-up smile photos, laypeople noticed a 1.5 mm gum-level difference on a central incisor and 1 mm of wear on its edge. In that study, gum differences nearer the midline, and edge differences changing the smile arc, drew more attention. The principles behind them are covered under smile aesthetics.
Is the asymmetry in the teeth, the gum or their position?
Dental asymmetry usually sits at one of three levels, or a mix: the teeth, the gum around them, or where the teeth sit. Each level is corrected differently.
| Level | What it can look like |
|---|---|
| The teeth | An edge shorter or longer than its neighbour, or a tooth narrower or differently shaped |
| The gum | The gum line higher over one tooth, making it look longer, or covering more of it, making it look shorter |
| Position | A tooth higher, lower, turned or tipped against its neighbours, or the midline off centre |
Some causes need a dentist's check first. For a chipped, cracked or broken tooth, NHS guidance is to see a dentist. Its teeth grinding page gives the same advice when grinding comes with tooth damage, sensitive teeth or pain in the jaw, face or ear, when a partner notices grinding during sleep, or when you are worried about a child grinding. Gum that has moved back, exposing root, is worth showing to a dentist too.
What are the options at each level?
In general, tooth-level asymmetry is reshaped or built up, gum-level asymmetry is treated at the gum, and position-level asymmetry is treated by moving teeth. The 2014 review advises correcting gum asymmetry when it shows on smiling.
The teeth: edges, size and shape
A slightly long incisal edge can be smoothed by tooth recontouring, which removes a little enamel; enamel cannot grow back naturally, as it forms only once, before the tooth erupts (2026 review). A short or chipped edge can be built up in composite, as in edge bonding. Composite suits minor contour changes with minimal preparation, but can discolour, wear and stain at its margins and often needs repolishing or repair, a 2026 review says. It favours ceramics for more extensive changes, which generally need more invasive preparation; NHS guidance says some veneers mean drilling a little off the front of the tooth, though not all.
The gum line
Where extra gum covers part of a tooth, gum contouring reshapes the gum line. The 2014 review says probing and an X-ray or CT scan show whether it is feasible, by finding where the enamel ends. After aesthetic crown lengthening, a related gum surgery, a 12-month study of 20 people found some rebound of the gum margin during healing, which the authors judged not clinically important. Reshaping cannot add gum that has shrunk back; the 2003 review's treatments for recession include gum grafting, guided tissue regeneration and orthodontic treatment.
Tooth position
A tooth sitting higher, lower or turned can be moved with braces or straightening teeth with removable aligners. Reshaping or covering it changes its look, not its place: a JADA review found porcelain veneers cannot correct uneven gum margins caused by misaligned teeth. How teeth are moved is covered under orthodontic treatment.
To ask about uneven teeth, book online or call 0114 288 2121.
Can uneven teeth be evened out in one visit?
In general, sometimes, for small changes to an incisal edge. If a tooth is just chipped, NHS guidance describes an appointment to have it smoothed down and filled, or a crown fitted, which a laboratory can take some time to make. Moving teeth usually takes months.
Which options does the practice offer for uneven teeth?
Deepcar Dental Care offers options at the tooth, gum and position levels. They include tooth recontouring and reshaping, edge bonding, composite veneers and porcelain veneers; gum contouring and gum recession treatment; and clear aligners and fixed metal, ceramic and lingual braces. At the practice, straightening is for adults, and aligner treatment suits mild to moderate crowding and spacing, with extraction and complex cases assessed case by case.
How much does treating uneven teeth cost?
Deepcar Dental Care's fee list, checked on 29 October 2026, includes these lines for options named on this page:
- All Ceramic Crowns & Veneers: From £750 - £1000
- Clear aligners: from £1,495 per arch
- Composite Bonding Per Tooth: From £300
The fee list does not say whether the Composite Bonding Per Tooth line covers edge bonding or composite veneers, or whether the £1,495 per arch line covers fixed braces. Tooth recontouring and reshaping, gum contouring and gum recession treatment have no line on the fee list.
Frequently asked questions
Do people notice slightly uneven front teeth?
Small differences can go unnoticed. In a 2025 study, 90 dentists and 90 laypeople rated digitally altered full-face photos of one smile. Neither group noticed a midline up to 2 mm off centre; 3 mm was noticeable. A 2 mm width difference in one central incisor was rated significantly less attractive; width differences further from the centre were noticed less.
Can uneven teeth be fixed without braces?
Yes, when the teeth or gum are the cause: recontouring, composite or veneers can level edges, and gum contouring can trim excess gum where feasible. For a healthy tooth out of line, a JADA review calls aligning it with porcelain veneers not conservative, and advises offering more conservative options, such as orthodontics, bleaching, direct bonding or enamel reshaping.
Why does one front tooth look longer than the other?
Usually because of an edge, the gum or position. The neighbouring tooth may be chipped or worn shorter, the gum may have shrunk back on the longer tooth, or the longer tooth may sit lower. Each needs a different fix, and a chip, a worn edge or receding gum is worth showing to a dentist.
Is treatment for uneven teeth available on the NHS?
It depends on the treatment, according to NHS guidance: cosmetic treatments are usually private, and veneers generally private unless you can show a clinical need. Free NHS braces are usually limited to under-18s with a problem with their teeth, depending on its effect on day-to-day life. Adults usually pay; NHS braces are occasionally available to them, depending on clinical need.
Should the longer tooth be shortened or the shorter one lengthened?
It depends on which tooth looks right. For a gum-level difference between the two upper front teeth, a 2014 review of smile aesthetics advises first choosing the one with better proportions as the guide, then matching the other by reshaping the gum where feasible, or by moving the tooth and rebuilding or smoothing its edge. Ideals vary between people.
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The practice is open 8am to 8pm, Monday to Sunday.
If another concern fits better, such as a chipped front tooth or crooked front teeth, start from the options in this section. Our page on improving how your teeth look covers the wider field. Patients describe the practice in our patient reviews.
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Deepcar, Sheffield S36 2RH
0114 288 2121
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