What Causes Gaps Between Teeth?
Gaps between teeth can happen for many reasons.
Some people have had tooth spacing since childhood. Others notice a gap slowly becoming more obvious over time. In some cases, the gap is mainly cosmetic. In others, it may be linked to tooth position, missing teeth, gum health, or the way the teeth and jaws have developed.
The dental term for a gap between teeth is diastema. A diastema can appear anywhere in the mouth, but it is often noticed between the two upper front teeth.
Not every gap needs treatment. Some people like the natural spacing between their teeth and have no oral health concerns. But if a gap is new, getting wider, trapping food, or appearing with bleeding gums, loose teeth, or gum changes, it is worth having it checked by a dentist.
At Reasons to Smile Dental Care in Canberra, near City Walk, your dentist can assess the cause of tooth spacing and explain whether treatment may be needed.
What Are Gaps Between Teeth?
Gaps between teeth simply mean there is visible space between two or more teeth.
Some gaps are small. Others are more noticeable when speaking or smiling. Tooth spacing can affect the front teeth, back teeth, upper teeth, lower teeth, or several areas at once.
In children, spaced teeth can be part of normal dental development. As adult teeth come through and the jaws continue to grow, some gaps may close naturally. Cleveland Clinic notes that diastema is more common in children, and some gaps may close once all permanent teeth come in.
In adults, gaps between permanent teeth are less likely to close on their own. Whether they need treatment depends on the cause, the size of the space, gum health, bite, function, and the patient’s goals.
Common Causes of Gaps Between Teeth
1. Tooth Size and Jaw Size
One common reason for tooth spacing is a mismatch between the size of the teeth and the size of the jaw.
If the teeth are smaller compared with the jaw, there may be extra room between them. This can create spaces, especially around the front teeth.
This can run in families. Some people naturally inherit smaller teeth, a wider jaw, or a combination that makes gaps more likely. Cleveland Clinic lists small teeth and inherited traits as possible causes of diastema.
This type of spacing is not always a health issue. But if the gaps affect your bite, speech, cleaning, or confidence, your dentist can discuss suitable options.
2. Missing Teeth
A missing tooth can leave a space, but it can also affect the teeth around it.
When a tooth is missing, nearby teeth may slowly drift or tilt into the space. This can create new gaps or make existing gaps more noticeable. The opposing tooth may also move because it no longer has a tooth to bite against.
Missing teeth can happen because of dental decay, gum disease, injury, or a tooth that never developed.
If a gap is caused by a missing tooth, treatment may involve replacing the tooth, moving teeth with orthodontic care, or a combination of approaches. Your dentist can assess what is suitable based on the space, bite, bone support, and condition of nearby teeth.
3. Naturally Small or Peg-Shaped Teeth
Some people have teeth that are smaller than usual. This is often noticed with the upper lateral incisors, which are the teeth beside the two upper front teeth.
If these teeth are narrow or peg-shaped, spaces can appear beside them. Even if the teeth are straight, the proportions may leave visible gaps.
This type of tooth spacing is often related to tooth shape rather than jaw position. Depending on the situation, your dentist may discuss options such as bonding, veneers, orthodontic treatment, or simply monitoring the space if it is not causing concern.
4. A Large or Low Frenum
The frenum is the small fold of tissue that connects the inside of the lip to the gum.
For some people, the upper lip frenum sits lower or is thicker than usual. If it sits between the two upper front teeth, it may contribute to a gap in that area. Cleveland Clinic lists an oversized frenum as one possible cause of diastema.
This does not mean every person with a gap needs frenum treatment. The dentist needs to assess whether the tissue is actually contributing to the spacing.
In some cases, orthodontic treatment may be considered first. In other cases, a procedure called a frenectomy may be discussed. Suitability depends on the patient’s age, tooth position, gum health, and overall treatment plan.
5. Childhood Habits
Some childhood habits can affect tooth position over time.
These may include thumb sucking, finger sucking, long-term dummy or pacifier use, tongue thrusting, or lip habits.
These habits can place repeated pressure on the front teeth. Over time, they may push teeth forward or apart, contributing to gaps between teeth.
Not every child with these habits will develop spacing. The effect can depend on how often the habit happens, how long it continues, and how much pressure is placed on the teeth and jaws.
If a child has spaced teeth, it is best to ask a dentist for guidance. Sometimes spacing is part of normal development. Other times, early advice may help reduce the chance of future bite or alignment concerns.
6. Tongue Pressure or Swallowing Patterns
The tongue plays a bigger role in tooth position than many people realise.
Normally, the tongue rests and moves in a way that supports normal function. But if the tongue regularly presses against the front teeth during swallowing, speaking, or resting, it can place pressure on the teeth over time.
Cleveland Clinic notes that an abnormal swallowing reflex, where the tongue presses against the front teeth instead of the roof of the mouth, may cause a gap to form over time.
This is one reason the cause of tooth spacing matters. Closing a gap without addressing the pressure behind it may not give a stable long-term result.
7. Gum Disease
A new or widening gap between teeth can sometimes be linked to gum disease.
Advanced gum disease can affect the bone and tissues that support the teeth. When support is lost, teeth may shift, loosen, or spread apart. Cleveland Clinic notes that gaps can form when advanced gum disease erodes jawbone support.
This is different from a natural gap someone has always had.
If you notice gaps becoming wider, or if spacing appears with bleeding gums, swollen gums, bad breath, gum recession, or loose teeth, it is important to book a dental assessment. Gum disease treatment may be needed before cosmetic or orthodontic options are considered.
8. Teeth Shifting Over Time
Teeth can move gradually over the years.
This can happen because of changes in the bite, missing teeth, gum disease, previous orthodontic relapse, grinding or clenching, or pressure from the tongue and lips.
Some people had braces years ago and notice their teeth slowly spacing again, especially if they no longer wear retainers. Others notice spacing after a tooth is removed or after changes in their gum health.
Small changes can be normal, but movement that is noticeable or ongoing should be assessed.
Do Gaps Between Teeth Need To Be Closed?
Not always.
A gap between teeth does not automatically mean something is wrong. If your teeth and gums are healthy, your bite is comfortable, and the spacing does not bother you, treatment may not be needed.
Treatment may be considered if:
- The gap is getting wider
- Food keeps trapping between teeth
- The spacing affects your bite
- Teeth are shifting
- There are signs of gum disease
- A missing tooth has created the space
- The gap affects your confidence
- The spacing makes cleaning more difficult
The right approach depends on the cause. That is why an assessment matters before choosing treatment.
How Can Gaps Between Teeth Be Treated?
Treatment depends on why the gap is there.
For some patients, orthodontic treatment such as braces or clear aligners may be suitable to move teeth into a better position. For smaller cosmetic gaps, bonding or veneers may be discussed. If a missing tooth has caused the gap, options such as a bridge, denture, or dental implant may be considered depending on the patient’s oral health and suitability.
If gum disease is involved, gum treatment usually needs to come first. Research shows that if diastema is caused by gum disease, periodontal treatment is needed to control infection before addressing the gap itself.
No single option suits everyone. At Reasons to Smile Dental Care, your dentist can assess your teeth, gums, bite, and goals before explaining what may be appropriate.
When To Speak With a Dentist
Book a dental appointment if you notice a gap that is new, changing, or becoming wider.
You should also seek advice if the gap appears with gum bleeding, swelling, bad breath, tooth movement, loose teeth, pain, or food trapping.
A dentist can check whether the spacing is related to tooth size, jaw size, missing teeth, habits, gum health, or bite changes. Once the cause is clear, they can explain whether treatment is needed and what options may be suitable.
If you are in Canberra or near City Walk and are concerned about gaps between your teeth, Reasons to Smile Dental Care can assess your oral health and discuss your options.
Gaps between teeth are not always a problem. But when they change, they are worth checking.
FAQs
What is a diastema?
A diastema is the dental term for a gap between teeth. It can happen anywhere in the mouth, but it is often noticed between the two upper front teeth.
Are gaps between teeth normal?
Yes, gaps between teeth can be normal for some people. They are common in children and may close as adult teeth come through. In adults, gaps may remain stable or may need assessment if they are new or changing.
Can gum disease cause gaps between teeth?
Yes, advanced gum disease can affect the tissues and bone that support the teeth. This may allow teeth to shift or spread apart. If gaps are appearing with bleeding gums, swollen gums, or loose teeth, book a dental check-up.
Can gaps between teeth close on their own?
In children, some gaps may close as permanent teeth come in. In adults, gaps between permanent teeth are less likely to close on their own. Whether treatment is needed depends on the cause and the patient’s goals.
What is the best treatment for tooth spacing?
The best treatment depends on the cause of the tooth spacing. Options may include orthodontic treatment, bonding, veneers, tooth replacement, gum treatment, or monitoring. A dentist can assess your teeth and explain what may be suitable.