Small teeth: causes, aesthetic issues and how to correct them

Having small teeth is a very common reason for consultation, especially when it affects the harmony of the smile. Sometimes it is natural and present from birth; in other cases, the teeth appear to have become shorter over time. In both situations, beyond the aesthetic aspect, it is important to understand the cause, because it can influence the bite, the proportion of the smile and even the balance of the face.

In this article, we look at why small teeth appear, what problems they can cause and which options are available to correct them naturally.

Why do I have small teeth?

There is no single explanation. Small teeth can be due to several factors, which often combine:

• Genetics. This is the most common cause: smaller teeth are simply inherited.
• Microdontia. A developmental alteration in which one or several teeth are smaller than usual.
• Tooth wear. Over time, teeth can become shorter due to continuous friction.
• Bruxism. Clenching or grinding the teeth accelerates this wear and reduces their height.
• Developmental alterations. Teeth that did not fully form or erupt normally.
• Proportion between tooth, gum and lips. Sometimes the tooth has a normal size, but the gum or lip makes it appear smaller.

That is why, before considering any solution, the important thing is to identify what lies behind that sensation of having small teeth.

Small teeth in adults: when it is normal and when it should be checked

It is useful to distinguish between two different situations:

• Naturally small teeth. If you have always had them that way and they have not changed over the years, it is usually a personal characteristic, with no implications beyond the aesthetic aspect.
• Teeth that seem shorter over time. If you notice that they used to be longer and now look shorter, it is usually a sign that something is happening: wear, gum recession or a functional problem.

In this second case, it should be checked, because it may indicate wear caused by bruxism or erosion, gum recession or a bite that is damaging the teeth.

Detecting it early makes it possible to slow the process before it progresses.

Teeth shorter than others: what it may mean

When some teeth look shorter than the rest, it is not always a purely aesthetic issue. It can affect the bite, the harmony of the smile and facial balance.

These are the most common causes.

Wear caused by bruxism or dental erosion

Bruxism — clenching or grinding the teeth — and erosion — caused by acids in the diet or reflux, for example — gradually wear down the tooth surface. The result is teeth that become progressively shorter, often without the person noticing until the change becomes obvious.

Size differences caused by dental development

In other cases, the differences in size are developmental: teeth that formed smaller or with a different proportion. Here, there is no wear, but rather a characteristic of the person’s own dental development.

Gums that cover too much of the tooth

Sometimes the tooth has the correct size, but the gum covers a larger part than it should. This makes the tooth “appear” shorter and can lead to a gummy smile, where too much gum is visible when smiling.

Aesthetic and functional problems caused by small teeth

Small or disproportionate teeth can have an impact that goes beyond appearance:

• A childish-looking smile, which reduces the natural appearance of the overall smile.
• Excess gum when smiling — gummy smile.
• Disproportionate teeth in relation to the rest of the face or to each other.
• An aged-looking smile, as wear is often associated with an older appearance.
• Bite problems, when tooth size affects how the teeth fit together.
• Insecurity when smiling, which is often what affects the person most.

How to know whether the problem is in the tooth, gum or bite

One of the keys to choosing the right treatment is to assess the smile as a whole, not just the tooth in isolation. In an aesthetic assessment, several elements are taken into account:

• The real dental size of each tooth.
• The position of the gums and how much of the tooth they cover.
• The shape and movement of the lips when smiling.
• The amount of tooth exposed when speaking and smiling.
• The relationship between the smile and the rest of the face.

Only by analysing everything together is it possible to know whether the origin lies in the tooth, the gum, the bite or a combination of factors, and therefore design a truly personalised plan.

How to make small teeth look bigger without making them look artificial

The aim of good treatment is not to “make big teeth”, but to restore the proportion, harmony and balance of the smile so that the result looks natural. These are the most common options.

1. Dental veneers to improve size, shape and proportion

Dental veneers are thin layers that are placed over the visible surface of the tooth. They make it possible to improve the size, shape and proportion of several teeth at the same time, achieving a harmonious smile. They are a very versatile option when seeking a noticeable and long-lasting aesthetic change.

2. Dental composite for conservative changes

Composite allows material to be added directly to the tooth in order to lengthen it or reshape it conservatively, usually in a single session and with minimal tooth wear. It is a good alternative for more specific corrections or as a more economical solution.

3. Crown lengthening if the gum covers part of the tooth

When the problem is that the gum covers too much of the tooth, crown lengthening allows the gum contour to be repositioned to show more tooth surface. It improves proportion and is especially useful in cases of gummy smile.

4. Orthodontics when the problem is tooth position

If the teeth look small or disproportionate because of their position or alignment, orthodontics can reposition them and improve the overall appearance, sometimes as a prior step before other aesthetic treatments.

You can find out more about all these options in our cosmetic dentistry treatments.

Which treatment to choose depending on the cause of small teeth

The best solution depends on the origin of the problem. As a guide, these are the most common cases:

• Small teeth due to genetics. These usually improve very well with veneers or composite, which add size and proportion.
• Worn teeth. It is important to stop the cause of the wear — for example, bruxism — and then restore the affected teeth.
• Gummy smile. Crown lengthening is the option that produces the greatest change when the gum is the main factor.
• Misaligned teeth. Orthodontics repositions the teeth, and cosmetic dentistry can then be added if necessary.

These examples are only a guide: the definitive plan can only be established after a professional assessment. At Face Clinic, we study each smile individually in order to recommend the most appropriate treatment in each case.

When to request a cosmetic dentistry assessment

If you identify with any of these signs, it may be a good time to request a cosmetic dentistry assessment:

• You notice that your teeth are becoming increasingly short.
• Your smile seems poorly balanced or disproportionate.
• There is visible wear on the teeth.
• Your gums are uneven or you show too much gum when smiling.
• You feel insecure when smiling and would like to improve it.

An assessment will allow you to understand the real cause and the available options, so that you can decide with clear information and restore a balanced, natural-looking smile.