Diastema (Gap Between Teeth)

Types of Diastema

• Physiological diastema

  A natural, temporary gap that commonly appears during the mixed dentition phase — when baby teeth and permanent teeth are present at the same time, typically between ages six and twelve. The gap forms as the jaw widens to accommodate the larger permanent teeth. In most cases it closes on its own once the upper canines erupt, usually around ages eleven to thirteen. No treatment is needed unless the space persists after the permanent dentition is fully established.

• True diastema

  Caused by an oversized or low-attached labial frenum — the thin band of tissue connecting the upper lip to the gum above the front teeth. When this tissue is thick or extends too far down, it can physically prevent the two central incisors from coming together. Treatment typically involves a minor surgical procedure called a frenectomy, combined with orthodontic treatment.

• Pseudo-diastema

  A gap that develops because of tooth-size discrepancy or missing teeth. If the upper lateral incisors are smaller than average or absent, the front teeth have more space than they need and drift apart. A supernumerary (extra) tooth growing behind the front teeth can also push them apart, creating a visible gap.

What Causes Diastema

More than one factor is often present at the same time.

• Genetics — Inherited traits such as undersized lateral incisors, a thick labial frenum, or a mismatch between jaw size and tooth size are among the most common drivers. Diastema frequently runs in families.
• Oversized labial frenum — Thick or low-positioned frenum tissue creates a physical barrier between the upper front teeth.
• Missing or undersized teeth — If teeth are congenitally absent or smaller than average, neighboring teeth drift and gaps form.
• Gum disease — Advanced periodontitis causes bone loss around tooth roots. As the supporting bone is destroyed, teeth can loosen, migrate, and separate — creating gaps that were not previously present.
• Tongue thrust — A swallowing pattern in which the tongue presses forward against the front teeth rather than upward against the palate. Repeated over time, this pressure can push the upper front teeth apart.
• Thumb sucking and oral habits — Prolonged thumb sucking or dummy use in early childhood can push the front teeth forward and outward, contributing to spacing.
• Supernumerary teeth — An extra tooth developing behind the upper front teeth can displace them, forcing a gap to open.

Symptoms and Signs to Watch For

The only consistent sign of diastema is the visible gap itself. When the cause is purely structural — a tooth-size or jaw-size discrepancy — there are typically no other symptoms.

When a diastema is caused or worsened by gum disease, additional signs may appear:

• Gum redness, swelling, or tenderness
• Bleeding when brushing or flossing
• Teeth that feel loose or appear to be shifting
• Persistent bad breath or a bad taste in the mouth
• A gap that is visibly widening over time

A widening gap in an adult should always prompt a dental assessment. It can indicate active bone loss requiring periodontal treatment — not just cosmetic correction.

Why Diastema Should Not Always Be Left Untreated

Many diastemas are harmless. If the teeth and supporting structures are healthy and the gap is stable, monitoring without treatment is entirely appropriate.

But not all diastemas are stable. When the gap is caused by gum disease, it will typically continue to widen as bone loss progresses and teeth may loosen over time. Closing the gap cosmetically without treating the underlying infection first is not appropriate — the infection must be resolved before any restorative or orthodontic work is considered.

A true diastema held open by the frenum will generally not close on its own in permanent dentition. Diastemas linked to tongue thrust or other habits will tend to expand if the habit is not addressed.

How Diastema Is Treated

Treatment depends on the cause, size of the gap, and the patient's goals. A dentist will identify the cause before recommending any treatment — closing a gap without addressing why it formed increases the risk of relapse.

• Orthodontic treatment

  The most reliable approach for larger gaps or gaps associated with broader alignment issues. Braces use brackets and wires to move teeth gradually together. Invisalign clear aligners are effective for mild to moderate gaps and are a popular choice for adults. A retainer following treatment is essential — without it, the gap will typically reopen.

• Composite bonding

  A conservative, same-visit option for small gaps. Tooth-colored resin is applied directly to the edges of the teeth to close the space visually. No enamel removal is required. Composite bonding is best suited to small gaps where closing the space will not result in teeth that appear disproportionately wide — your dentist will assess whether the gap size is appropriate for this approach.

• Dental veneers

  Thin ceramic shells placed over the front surface of the teeth, reshaping them and closing the gap in the process. Dental veneers offer a durable cosmetic result and can be planned precisely using Digital Smile Design to ensure proportional, natural-looking outcomes. All ceramic restorations at our centers are produced in our onsite dental laboratory.

• Frenectomy

  Where the labial frenum is identified as the cause, a minor surgical procedure removes or repositions the frenum tissue. This is performed during or after orthodontic treatment — not before. Removing the frenum before the gap is closed causes scar tissue to form between the teeth, which makes closure more difficult and increases the risk of relapse.

• Periodontal treatment

  If gum disease is contributing to the diastema, periodontal treatment must be completed first — scaling and root planing, and in more advanced cases surgical intervention. Once the infection is under control and bone loss has stabilized, any remaining gap can be assessed for further treatment.

Can Diastema Be Prevented

Not all diastemas can be prevented, particularly those driven by genetics or congenitally missing teeth. However, several contributing factors are manageable:

• Maintaining gum health — Consistent brushing, flossing, and regular professional cleaning and Guided Biofilm Therapy reduce the risk of gum disease and the bone loss that can cause teeth to drift and separate.
• Addressing oral habits early — Thumb sucking and dummy use beyond age three to four should be gently discouraged to avoid pressure-related tooth displacement.
• Early orthodontic screening — A Specialist Orthodontist can identify space management issues before they become established. The American Association of Orthodontists recommends an orthodontic evaluation by age seven.