A peg lateral is an upper lateral incisor (the tooth just to the side of your two front teeth) that developed small and cone-shaped instead of the normal rectangular shape. Some patients call these peg teeth or a peg tooth. It’s usually noticeable from childhood, it’s often on one side only, and it’s one of the most common tooth-shape variations we see. If you’ve been looking at a small, pointy tooth next to your front teeth and wondering what’s going on, this guide covers exactly that.
What Is a Peg Lateral Tooth?
Your upper lateral incisors sit between your two front teeth (the centrals) and your canines. A normal lateral incisor is roughly rectangular, close in shape to the central next to it, just slightly smaller.
A peg lateral tooth didn’t develop to that full shape. Instead, it comes in narrow and tapered, wider at the gumline and pointed at the biting edge, like a small cone. Dentists sometimes call this a peg-shaped tooth or peg tooth. It’s a shape and size issue, not a health issue. The tooth is fully formed and functional. It’s just smaller and a different shape than the tooth beside it.
Peg laterals are present from the time the permanent tooth erupts, usually around age 8-10. Nothing changes it over time. The tooth that comes in peg-shaped stays peg-shaped unless it’s treated.
We covered small teeth more broadly, including gummy smiles and worn teeth that only look small, in our guide to microdontia and small teeth. This article goes deeper on peg laterals specifically, since they’re the most common version of the problem by a wide margin.
What Causes Peg Lateral Teeth?
Genetics is the main cause. Peg laterals run in families the same way tooth size, jaw shape, and spacing do. If a parent or sibling has a peg lateral, there’s a real chance it shows up in the next generation too.
A few other patterns show up alongside peg laterals:
- One-sided vs. two-sided. Most patients have a peg lateral on one side only, with a normal-shaped lateral on the other. Both sides being affected happens too, just less often.
- Missing lateral on the other side. Sometimes the lateral incisor on the opposite side never develops at all (a condition called congenitally missing lateral incisors). When one lateral is a peg and the other is missing, or both laterals are missing, that’s part of the same genetic pattern, not a coincidence.
- No outside cause. Peg laterals aren’t caused by anything a parent did or didn’t do during pregnancy or childhood. They’re a developmental trait, not the result of an injury, illness, or medication.
Peg laterals show up in roughly 1-2% of the population, which makes them the most common form of localized microdontia we see at our Nashville practice.
Are Peg Laterals a Problem?
For most patients, no. A peg lateral bites and chews normally. It’s not painful, and it doesn’t put you at higher risk for decay or gum disease just because of its shape.
The issues that come up are cosmetic and, sometimes, related to spacing:
- Visible gaps. Because a peg lateral is narrower than a normal lateral, there’s often extra space on one or both sides of it. That space shows up as a gap next to the peg tooth, or between the front two teeth if the peg lateral’s neighbors shift to fill some of the space.
- Food and hygiene. Larger gaps around a peg lateral can trap food, which means a bit more attention to flossing in that area.
- Asymmetry. Because the peg lateral is usually smaller than the tooth on the opposite side, the smile can look uneven, especially in photos.
- Drifting over time. If the gap around a peg lateral is large, the tooth in front of it (the central incisor) or behind it (the canine) can gradually tip or drift into the space. Left long enough, this can shift your bite, not just your smile.
If your peg lateral isn’t bothering you and your bite feels normal, there’s no urgency to treat it. Most patients come in because they want the tooth to match the rest of their smile, not because of pain or dysfunction.
Treatment Options for Peg Lateral Teeth
Composite Bonding
Representative image, not an actual patient photo.
For most peg laterals, bonding is the first option we discuss, and honestly one of the best cases for bonding that exists. Dr. D’Aoust applies tooth-colored composite resin to the sides and edge of the tooth and builds it out to match the width, length, and shape of the lateral incisor on the other side. No enamel removal, one visit, and you see the result the same day.
Peg laterals respond well to bonding because the underlying tooth structure is healthy. There’s no decay or damage to work around, just shape to add. That makes the case predictable and the result durable for a conservative, reversible treatment.
Cost: $240-$475 per tooth, depending on how much shape needs to be built and how many surfaces are involved. Our dental bonding cost guide breaks down how bonding is priced in more detail.
Composite Veneer
If the peg lateral needs a fuller rebuild across the whole front surface, not just added width at the edges, a composite veneer gives more complete coverage while staying in the same material family as bonding.
Cost: $660-$1,015 per tooth.
Porcelain Veneer
For patients who want the most durable, stain-resistant, and lifelike result, or who are treating a peg lateral alongside other cosmetic goals like color or overall smile shape, a porcelain veneer is the longer-lasting option. A custom-made porcelain shell replaces the front surface of the tooth and is shaped to match the width, length, and translucency of the tooth beside it.
Cost: $1,800+ per tooth. Porcelain veneers require removing a thin layer of enamel and take two to three visits, so they’re a bigger commitment than bonding. For a single peg lateral, bonding often gets you most of the way there. Porcelain is worth it when you want the most durable result, or when you’re addressing more than just the one tooth.
When Orthodontics Comes First
If the gap around your peg lateral is large, or your teeth have shifted to partly fill the space, building the tooth up with bonding or a veneer right away can leave it looking crowded or oddly positioned. In these cases, Invisalign moves the teeth into better position first and redistributes the space evenly, so the peg lateral (and its neighbors) end up with the right amount of room before any restorative work happens.
This combination comes up often with peg laterals specifically, since the gap pattern is so common. Aligning first also means less bonding material is needed afterward, which tends to give a cleaner final result.
Cost: $5,000 for a full Invisalign case, all-inclusive. Worth it if you have other spacing or alignment concerns beyond the one tooth. Our Invisalign cost guide has more on how Invisalign pricing works.
Treatment Comparison
| Treatment | Visits | Best for |
|---|---|---|
| Composite bonding | 1 | Most peg lateral cases |
| Composite veneer | 1-2 | Fuller rebuild of the tooth |
| Porcelain veneer | 2-3 | Most durable result, or treating multiple cosmetic goals at once |
| Invisalign, then bonding/veneer | Months, then 1-3 | Large gaps or shifted teeth around the peg lateral |
We give you a specific quote at your consultation, once we’ve measured the tooth and confirmed which approach fits your case.
Peg Laterals in Teens vs. Adults
Peg laterals are usually spotted the moment the permanent lateral incisors come in, around age 8-10. Parents often ask whether to fix it right away.
In most cases, we wait. Teeth and gums are still settling into their final position through the early teenage years, and if orthodontic treatment is in the plan, it makes sense to finish that first. Bonding a peg lateral before braces or Invisalign is finished means redoing the work once the tooth’s neighbors have moved. The general pattern: finish orthodontics, let the gum tissue mature around the newly positioned teeth, then do the final bonding or veneer.
Adults with a peg lateral they’ve had since childhood can treat it at any age. There’s no downside to waiting years to address it, and no advantage to rushing. Bonding, composite veneers, and porcelain veneers all work the same way regardless of when you get around to it.
What to Expect: Before and After
The most common before-and-after with a peg lateral involves three changes at once: the tooth gets wider, the tooth gets a squared-off edge instead of a point, and the gap next to it closes or shrinks. Because the change happens on one tooth, matched to the shape and shade of the tooth on the opposite side, the result reads as a normal, symmetrical smile rather than an obviously “worked on” tooth.
Patients are often surprised by how much a single tooth affects the whole smile. Once a peg lateral matches its neighbor in width and shape, the eye stops catching on the asymmetry, even in close-up photos.
How Much Does Peg Lateral Treatment Cost in Nashville?
For most patients, bonding a single peg lateral runs $240-$475 and is finished in one visit. That’s the most common and most affordable fix for this exact concern, and it’s often the single best use case for composite bonding that we see.
If you want a longer-lasting, more stain-resistant result, or you’re treating other cosmetic concerns at the same time, porcelain veneers start at $1,800 per tooth. Composite veneers sit in between at $660-$1,015 for a fuller rebuild than bonding without the cost of porcelain.
If your case needs orthodontics first to create even spacing, Invisalign runs $5,000 all-inclusive, with bonding or a veneer to follow once the tooth is in its final position.
We give every patient an exact number at the consultation, after Dr. D’Aoust has looked at the tooth and confirmed which approach fits.
Does Insurance Cover Peg Lateral Treatment?
Usually not. Bonding or veneers to reshape a peg lateral are typically classified as cosmetic by dental insurance. A few exceptions:
- HSA and FSA funds can be used for bonding, composite veneers, or porcelain veneers
- If a peg lateral is part of a broader bite or functional issue, part of the orthodontic treatment may be covered
- Some plans partially cover pediatric cases when a peg lateral is documented as a developmental anomaly, though coverage varies widely
Financing Options
- Sunbit: Most patients get approved in minutes, with 0% APR for qualified applicants.
- HSA/FSA: Pre-tax dollars reduce your effective cost by 20-30%.
- In-house payment plans: Available for larger cases, including Invisalign plus bonding or veneers.
Why Nations Dental Studio for Peg Lateral Treatment
Bonding done right. A peg lateral is one of the cleanest bonding cases in cosmetic dentistry, and Dr. D’Aoust treats it that way. Matching the width, edge shape, and shade of the tooth beside it takes a steady hand and a good eye, not just composite applied to fill space.
Cosmetic focus. Dr. D’Aoust is a member of the American Academy of Facial Esthetics and evaluates how a rebuilt peg lateral fits your whole smile, not just the one tooth. Dr. Raffoul works with patients who are nervous about a first cosmetic procedure and explains each step before starting.
Honest sequencing. If your case needs Invisalign first to distribute the spacing evenly, we’ll say so, even though it means a longer timeline before the cosmetic work. Bonding onto teeth that haven’t finished shifting rarely holds up as well as bonding done after the spacing is settled.
FAQs About Peg Lateral Teeth
What is a peg lateral tooth?
A peg lateral is an upper lateral incisor (the tooth next to your two front teeth) that developed small and cone-shaped instead of the normal rectangular shape. It’s present from childhood and doesn’t change on its own.
What causes peg lateral teeth?
Genetics is the main cause. Peg laterals run in families and are sometimes paired with a missing lateral incisor on the opposite side. There’s no outside cause, like an injury or illness, behind a typical peg lateral.
Are peg laterals rare?
Peg laterals show up in roughly 1-2% of the population, which makes them the most common form of localized microdontia, a tooth or teeth that develop smaller than normal.
How much does it cost to fix a peg lateral tooth?
Bonding for a single peg lateral runs $240-$475 and is done in one visit. Composite veneers run $660-$1,015 per tooth. Porcelain veneers start at $1,800 per tooth. If Invisalign is needed first to fix spacing, that runs $5,000, all-inclusive.
What does peg lateral teeth before and after look like?
The tooth typically gains width and a squared edge instead of a point, and the gap next to it closes or shrinks. Because the shade and shape are matched to the tooth on the opposite side, the result looks like a normal, symmetrical smile rather than an obviously treated tooth.
Do peg laterals need braces first?
Not always. If the gap around the peg lateral is small, bonding or a veneer alone can close it. If the gap is large or nearby teeth have already drifted, Invisalign first distributes the spacing evenly, then bonding or a veneer finishes the tooth.
Can a peg lateral be fixed without a veneer?
Yes. Composite bonding is a same-day, no-enamel-removal option that works well for most peg laterals. Veneers are for patients who want the most durable, stain-resistant result or who are treating additional cosmetic concerns at the same time.
Should I wait to treat my child’s peg lateral?
Usually, yes. Most dentists wait until any orthodontic treatment is finished and the gum tissue around the repositioned teeth has settled before doing the final bonding or veneer. Treating it too early often means redoing the work later.
Ready to Talk About Your Peg Lateral?
Whether it’s a single peg-shaped tooth, a gap you’d like closed, or a smile that looks slightly uneven in photos, a consultation tells you exactly what it takes to fix it.
Schedule a bonding consultation at our West Nashville office, or contact us with questions. We’ll measure the tooth, explain your options, and give you a specific quote before any work starts.