Short answer: A diastema (gap between teeth) is a noticeable space between two teeth, most often seen between the upper front teeth. The main causes are a mismatch between tooth and jaw size, a thick lip frenum, missing or small teeth, a tongue-thrusting habit and gum disease. Treatment closes the gap either by moving the teeth with clear aligners or braces, or with cosmetic procedures such as bonding and veneers. The method is chosen through a dental examination according to the cause and the tooth structure.
If you see a gap between your front teeth when you smile, you are not alone. Gaps between teeth are common in both children and adults; for some people they are simply a matter of aesthetic preference, while for others they may signal a problem related to chewing, speech or gum health. In this article, we cover the causes of diastema, orthodontic and cosmetic closure methods, and what needs to be done after treatment to keep the gap from reopening.
What is a diastema and what causes it?
A diastema is a wider-than-normal space between two neighboring teeth, most commonly seen between the two upper central incisors. There is no single cause for this gap; to choose the right treatment, the cause must first be identified. Common causes include:
- Mismatch between tooth and jaw size: When the teeth are small relative to the width of the jawbone, gaps form between them.
- Thick or low-attached lip frenum: If the tissue connecting the upper lip to the gums extends down between the two front teeth, it can prevent the teeth from coming together.
- Missing or small teeth: In particular, congenitally missing lateral incisors, or pointed and small ones, lead to gaps in the front area.
- Habits: Habits such as pushing the tongue against the front teeth when swallowing and long-term thumb sucking can spread the teeth forward and sideways.
- Gum disease: In advanced periodontal disease, supporting bone is lost, teeth shift and gaps open up later on.
In children, gaps between baby teeth are often normal; in fact, they are a good sign because they make room for the permanent teeth. The temporary gap seen between the upper front teeth during the mixed dentition period may also close on its own as the side teeth and canines erupt. For this reason, treatment is not started right away for every gap in children; monitoring and the right timing matter.
In adults, to understand the cause, the examination includes measuring tooth size, assessing the position of the lip frenum, observing tongue and swallowing habits and checking the gum pockets. If necessary, an X-ray shows whether there is an extra unerupted tooth between the front teeth (mesiodens) or bone loss. Once this information is put together, it becomes clear whether the gap only needs to be closed or whether it should be addressed together with its cause.
How do clear aligners and braces work in treating gap teeth?
Orthodontic treatment closes a diastema by moving the teeth themselves; it does not require altering the tooth structure. If the spacing is spread across several teeth, or if there are other problems with the bite or tooth alignment, this is usually the first-choice approach.
In clear aligner treatment, a series of aligners prepared with digital planning moves the teeth step by step toward each other. Closing spaces is one of the movements clear aligners can achieve relatively predictably; that is why it can be a suitable option for many adults whose only issue is a diastema. At our clinic, we provide this treatment with the Invisalign system. You can find details of the method on our clear aligner treatment for gap teeth page.
Braces serve the same purpose. Fixed treatment may be preferred when there are additional problems such as crowding, deep bite or jaw discrepancy, or when it is thought that the patient will not be able to keep up the discipline of wearing aligners. With both methods, the duration varies according to the width of the gap and any accompanying problems; it can take a few months in simple cases and longer in comprehensive ones.
Can gaps between teeth be closed with bonding and veneers?
Yes, if there is a single narrow gap and the position of the teeth is generally suitable, the gap can be closed with bonding or veneers. In these methods, the teeth are not moved; the space is visually filled by increasing the width of the teeth.
Bonding
Bonding is the layer-by-layer application and shaping of tooth-colored composite filling material on the tooth surface. In most cases it is completed in a single session, with little or no reduction of tooth structure. However, composite can stain over time, small chips can form at its edges, and polishing or renewal may be needed at certain intervals.
Veneers
Veneers are thin porcelain shells bonded to the front surface of the tooth. They are more durable than composite in terms of color stability and surface gloss; however, in most cases they require removing a thin layer of enamel from the tooth surface. Because this is irreversible, the decision should be made carefully.
Closing wide gaps with bonding or veneers alone can make the teeth look wider and less proportionate than they should. That is why, in some cases, orthodontic treatment is first used to distribute or narrow the spaces evenly, and the cosmetic touch is done afterwards.
Which gap-closing method suits whom?
The right method is determined by the cause of the gap, its width, the size of the teeth and the person's expectations. A general roadmap can be outlined as follows:
- If there are multiple gaps or a bite problem: Orthodontic treatment (clear aligners or braces) is usually the primary option.
- If there is a single narrow gap and otherwise healthy alignment: Bonding can be a quick and conservative solution.
- If the teeth also have color, shape or size issues: Veneers can be considered as part of a comprehensive cosmetic plan.
- If the lip frenum is causing the gap: A frenum procedure can be planned together with orthodontic closure.
- If the gap is due to gum disease: Periodontal treatment comes first; tooth movement is considered only after gum health has been restored.
Some people see the gap as part of their own smile and do not want treatment. If the gap does not affect gum health or chewing, this is also a valid choice; what matters is that the decision is an informed one.
Does relapse happen after treatment, and why is a retainer needed?
Gaps closed orthodontically tend to reopen if they are not retained. This is called relapse. The fibers around the teeth and pressure from soft tissues such as the lips and tongue can pull the teeth back toward their old positions. Because midline diastemas in particular are prone to relapse, after treatment a thin fixed retainer wire is often bonded to the back of the front teeth, or a clear retainer to be worn at night is provided.
How long and how often the retainer should be worn is determined by the orthodontist. You can find the rules for wear and care in detail in our article on retainer use after clear aligner treatment. For gaps closed with bonding, regular checks of the composite and renewal when necessary help preserve the result.
When should you get a gap-teeth examination in Ankara?
If the space between your teeth has recently started to widen, if it is accompanied by bleeding or recession of the gums, or if the gap bothers you aesthetically, getting an evaluation is worthwhile. At our clinic in Park Oran Ofis near Panora Mall in Çankaya, we identify the cause of the gap through examination and X-rays and evaluate the orthodontic or cosmetic options together with you.
Frequently asked questions
Does a gap between teeth close on its own?
In children, some gaps seen during the mixed dentition period can close on their own as the side teeth erupt. In adults, however, gaps usually do not close on their own; they may even widen if there is gum disease.
How long does it take to close a gap with clear aligners?
The duration varies according to the width of the gap and other accompanying problems. A few months may be enough in simple cases, while it may take longer in cases where bite problems are also corrected. A more precise duration can be estimated after digital planning.
How long does bonding used to close a gap last?
The lifespan of bonding depends on factors such as oral hygiene, eating habits and teeth clenching. With regular check-ups and polishing or repair when necessary, it can last for many years, but renewal may be needed over time.
Can a gap be closed without cutting the lip frenum?
Not every lip frenum causes a gap. If the frenum clearly extends between the teeth and contributes to the gap opening, a procedure can be planned together with orthodontic closure. This decision is made during the examination.
