What This Guide Covers
This guide explains how braces and other orthodontic treatments close gaps between teeth, a condition dentists call diastema.
If you have a visible space between your front teeth or gaps elsewhere in your smile, you are not alone. Gaps between teeth are one of the most common reasons people seek orthodontic care. [1] Some gaps are purely cosmetic concerns. Others can affect how you bite, chew, or speak.
This guide is for anyone considering treatment for gap teeth. It covers the causes of diastema, types of braces and aligners that close gaps, realistic timelines, cost ranges, and the critical role retainers play after treatment. Whether you are exploring options for yourself or for a child, the information here will help you understand what orthodontic gap closure involves.
Understanding Diastema: Causes and Types of Gaps
A diastema is a space of 0.5 mm or more between any two teeth, most often seen between the two upper front teeth (central incisors).
What Causes Gaps Between Teeth
Gaps form for several reasons. Understanding the cause helps your orthodontist choose the right treatment approach.
Genetics play a major role. If your teeth are naturally smaller than your jawbone can accommodate, extra space shows up as gaps. A mismatch between jaw size and tooth size is one of the most common causes. [2] Missing teeth, whether from birth (congenitally absent teeth) or from extraction, also leave spaces that neighboring teeth may not fully close on their own.
Habits and soft tissue factors contribute as well. Tongue thrusting, where the tongue presses forward against the front teeth during swallowing, can gradually push teeth apart. A large labial frenum, the band of tissue connecting your upper lip to the gum above your front teeth, can physically block the two central incisors from coming together.
Gum disease (periodontal disease) is another cause, particularly in adults. As gum disease progresses, it destroys the bone supporting your teeth. Teeth can loosen and drift apart, creating new gaps. In these cases, the gum disease must be treated before orthodontic work can begin. [2]
- Genetics: Small teeth relative to jaw size, or naturally missing teeth
- Large labial frenum: Thick tissue between the upper lip and gums that blocks tooth movement
- Tongue thrust habit: Repeated forward pressure on front teeth during swallowing
- Gum disease: Bone loss causes teeth to loosen and drift apart
- Tooth loss or extraction: Remaining teeth shift, creating irregular spacing
How Braces Close Gaps
Braces close gaps by applying constant, low-level force that slowly moves teeth through bone. This process is called orthodontic tooth movement.
When a bracket and wire system places pressure on a tooth, the bone on one side of the tooth root gradually breaks down (resorption) while new bone forms on the other side (deposition). This biological remodeling allows the tooth to shift position within the jawbone. For gap closure specifically, the orthodontist uses elastic chains (small connected rubber bands), coil springs, or wire bends to pull teeth toward each other.
The rate of tooth movement is typically about 1 mm per month, though this varies by patient and by which teeth are being moved. Front teeth with single roots generally move faster than molars with multiple roots. Your orthodontist controls the direction, speed, and sequence of movement by adjusting the wire and attachments at regular appointments, usually every four to eight weeks. [1]
Treatment Options for Closing Gaps
Several orthodontic approaches can close gaps. The best option depends on the size of the gap, the number of gaps, your bite alignment, and your preferences.
Metal braces are the most traditional option. They use metal brackets bonded to each tooth and connected by a metal archwire. Metal braces can close virtually any size gap and handle complex cases where spacing is combined with other bite problems. They give the orthodontist precise control over tooth position.
Ceramic braces work the same way as metal braces but use tooth-colored or clear brackets. They are less visible but function identically. Ceramic brackets can be slightly more fragile than metal ones.
Clear aligners use a series of custom-made, removable plastic trays that gradually shift teeth. Aligners can close many mild to moderate gaps effectively. For larger gaps (typically over 6 mm) or cases with significant bite issues, traditional braces may offer more predictable results. [1] Aligners require discipline because they must be worn 20 to 22 hours per day to work properly.
Lingual braces are brackets placed on the back surfaces of teeth, making them invisible from the front. They can close gaps but are less commonly used because they can be harder to adjust and may affect speech initially.
What to Know Before Getting Braces for Gap Teeth
Preparation and realistic expectations make a significant difference in treatment success and satisfaction.
Age Recommendations and Timing
There is no single "right" age for gap closure. Treatment timing depends on the cause of the gap and the patient's dental development.
For children, the American Association of Orthodontists recommends a first orthodontic evaluation by age seven. [1] At this age, enough permanent teeth have erupted for an orthodontist to spot developing spacing problems. However, many diastemas in children close naturally as more permanent teeth come in. An orthodontist may recommend monitoring rather than immediate treatment.
Teenagers are the most common age group for braces. By age 12 to 14, most permanent teeth have erupted, and the jaw is still growing. This combination can make gap closure more efficient. Adults of any age can also close gaps with braces or aligners, though treatment may take slightly longer because adult bone is denser and remodels more slowly.
When a Frenum or Gum Treatment Comes First
If a large labial frenum is causing the gap, your orthodontist may coordinate with a periodontist or oral surgeon for a minor procedure called a frenectomy. This removes or repositions the frenum tissue so it no longer pushes the teeth apart. The timing of a frenectomy relative to braces varies. Some orthodontists prefer to close the gap first and perform the frenectomy afterward to prevent scar tissue from blocking closure. Others prefer the opposite sequence.
If gum disease is present, it must be stabilized before starting orthodontic treatment. Moving teeth through diseased bone can worsen bone loss. Your orthodontist will likely refer you to a periodontist (a gum disease specialist) for treatment first. [2]
How Long Treatment Takes
Treatment time depends on the size and number of gaps, whether other bite corrections are needed, and the patient's biology.
For patients whose only concern is a single small gap between front teeth, treatment may take as little as 6 to 12 months. When gap closure is part of a larger treatment plan that includes correcting crowding, bite alignment, or multiple spaces, total treatment typically ranges from 12 to 24 months. [1] Some complex cases may take longer.
Clear aligner treatment for mild gaps may fall on the shorter end of these ranges. However, actual treatment length depends on compliance. Patients who do not wear their aligners for the recommended 20 to 22 hours per day will experience delays.
What to Expect During Treatment
The process of closing a gap with braces follows a predictable sequence from initial consultation through retention.
Initial Consultation and Records
Your first visit to an orthodontist typically includes a clinical exam, X-rays, photographs, and sometimes digital scans or impressions of your teeth. These records allow the orthodontist to measure the gap precisely, evaluate your bite, check for underlying causes like missing teeth or a large frenum, and create a treatment plan. [1]
The orthodontist will explain which type of braces or aligners would work best for your specific case. This is a good time to ask about expected treatment length, appointment frequency, and total cost.
Active Treatment: Closing the Gap
If you choose traditional braces, brackets are bonded to your teeth and connected with an archwire during a single appointment that typically takes one to two hours. Over the following weeks, you may notice the gap beginning to close. The orthodontist uses elastic power chains, small coil springs, or specific wire bends to direct the teeth toward each other.
Adjustment appointments happen every four to eight weeks. At each visit, the orthodontist checks progress and makes changes to the wire or elastic components. You may feel mild pressure or soreness for a day or two after each adjustment. Over-the-counter pain relievers and soft foods can help during this period.
If you choose clear aligners, you will receive a series of trays at your appointments. Each tray makes a small incremental change. You switch to a new tray every one to two weeks, as directed. Check-in appointments are usually every six to ten weeks.
Retention: Keeping the Gap Closed
Retention is arguably the most critical phase of gap closure treatment. Gaps between front teeth are among the most relapse-prone orthodontic corrections. Without a retainer, teeth have a strong tendency to drift back toward their original positions.
Most orthodontists prescribe a removable retainer to be worn full-time for the first several months after braces are removed, then nightly long-term. Some orthodontists also bond a thin fixed wire behind the front teeth (a bonded or permanent retainer) to provide constant support. [1]
Retainer wear is not optional if you want to maintain your results. Many orthodontists recommend wearing a retainer at night indefinitely. Failing to wear your retainer consistently is the single most common reason gaps reopen after treatment.
Cost of Braces for Gap Teeth
Full orthodontic treatment for gap closure typically ranges from $3,000 to $7,000. Costs vary by location, provider, and case complexity.
The type of braces you choose affects the price. Metal braces generally fall on the lower end of the range. Ceramic braces and clear aligners tend to cost slightly more, often $500 to $2,000 above the price of metal braces. Lingual braces are typically the most expensive option.
Other factors that influence cost include the severity of the gap, whether additional bite corrections are needed, the length of treatment, and geographic location. Orthodontists in larger metropolitan areas tend to charge more than those in smaller communities.
Many dental insurance plans cover a portion of orthodontic treatment, particularly for patients under 18. Coverage often has a lifetime maximum, commonly between $1,000 and $2,000. [2] Check with your insurance provider for specifics. Most orthodontic offices also offer monthly payment plans that spread the cost over the treatment period.
When to See an Orthodontist for Gap Teeth
An orthodontist is the right specialist when gaps affect your bite, when multiple gaps are present, or when the cause of the gap needs diagnosis.
A general dentist can identify a diastema and may offer cosmetic solutions like dental bonding or porcelain veneers for small gaps. These options cover the gap rather than moving the teeth. They can be a good choice when the gap is small, the bite is otherwise normal, and the patient prefers a faster cosmetic fix.
However, you should see an orthodontist if the gap is large (more than 2 mm), if there are multiple spaces throughout your teeth, if you also have bite problems like an overbite or crossbite, or if you want a structural correction that moves the teeth into proper position. An orthodontist has two to three years of specialty training beyond dental school, focused specifically on tooth movement and jaw alignment. [1]
Children with gaps between permanent front teeth should be evaluated by an orthodontist, especially if the gap is not closing on its own by age nine or ten. A gap that persists after the upper canines (the pointed teeth next to the front teeth) have erupted is unlikely to close without treatment.
- See an orthodontist if: the gap is larger than 2 mm or involves multiple teeth
- See an orthodontist if: you also have bite problems such as overbite, underbite, or crossbite
- See an orthodontist if: a large frenum appears to be causing the gap
- See an orthodontist if: your child's gap has not closed after the permanent canines have erupted
- A general dentist may help if: the gap is very small, isolated, and purely cosmetic
Find an Orthodontist Near You
If you are considering braces or aligners to close a gap between your teeth, a consultation with an orthodontist is the best starting point. An orthodontist can measure your gap, identify its cause, evaluate your bite, and recommend the most effective treatment option for your specific situation. Visit the orthodontics page to learn more about what orthodontists do and to search for a specialist in your area.
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