How Teeth Bonding Closes Gaps
Teeth bonding for gaps works by adding composite resin material to the sides of the teeth that border the gap. The resin is color-matched to your natural teeth, shaped to look like a natural extension of the tooth, and hardened with a special curing light. The result is teeth that appear slightly wider, filling in the gap between them.
The most common gap treated with bonding is a diastema, the space between the two upper front teeth. Diastemas are very common and are usually a cosmetic concern rather than a dental health issue. Bonding can also close smaller gaps between other teeth throughout the smile.
Unlike veneers or crowns, bonding adds material to the tooth without removing any natural tooth structure. This makes it one of the most conservative cosmetic dental procedures available. If you decide later that you want a different treatment, the bonding can be removed without permanent changes to your teeth.
What Happens During the Bonding Procedure
Teeth bonding for gaps is one of the simplest procedures in cosmetic dentistry. Most patients are surprised by how quick and painless it is.
Step-by-Step Process
First, your dentist selects a composite resin shade that matches your natural tooth color. A shade guide with dozens of options is held against your teeth to find the closest match.
Next, the tooth surface is lightly roughened with a mild etching solution. This creates a slightly textured surface that helps the bonding material adhere. A liquid conditioning agent is applied over the etched area.
The composite resin, which has a putty-like consistency, is applied to the tooth and sculpted into the desired shape. Your dentist builds up the material gradually, shaping it to look like a natural part of the tooth. A blue curing light is used to harden each layer in about 20 to 40 seconds.
After the resin is fully hardened, your dentist trims and polishes the bonded area to match the sheen of your natural enamel. The entire process takes 30 to 60 minutes per tooth.
No Drilling and Usually No Anesthesia
Because bonding adds material to the tooth rather than removing any, drilling is not required. Most patients do not need anesthesia unless bonding is being combined with another procedure, such as filling a cavity. The etching solution used to prepare the surface does not cause pain. This makes bonding an especially good option for patients who are anxious about dental procedures.
Cost of Teeth Bonding for Gaps
Teeth bonding for gaps typically costs $100 to $400 per tooth. Closing a gap between two front teeth means bonding both teeth, so the total cost would be $200 to $800 for both sides. Costs vary by location, provider, and the size of the gap being closed.
Dental insurance may cover bonding if it is done for structural reasons, such as repairing a chipped or broken tooth. When bonding is performed purely for cosmetic purposes like closing a gap, insurance usually does not cover it. Check with your plan to see how your specific situation is classified.
Compared to other gap-closing options, bonding is the most affordable. Porcelain veneers cost $900 to $2,500 per tooth, and orthodontic treatment costs $3,000 to $7,000 or more for the full course. Bonding gives you a visible result in one visit at a fraction of the cost.
How Long Does Teeth Bonding Last?
Composite bonding typically lasts 5 to 10 years before it needs repair or replacement. The lifespan depends on the size of the bonded area, your bite, your oral habits, and how well you care for the bonding.
Composite resin is not as hard as natural tooth enamel or porcelain. It can chip if you bite into hard foods directly on the bonded area, and it can stain over time from coffee, tea, red wine, or tobacco. Regular dental checkups allow your dentist to monitor the bonding and smooth or polish it as needed.
When bonding does wear down or chip, it can usually be repaired in a single visit by adding new composite material. A full replacement is a straightforward process similar to the original procedure.
Bonding vs. Veneers vs. Orthodontics for Gaps
Bonding is not the only way to close a gap between teeth. Depending on the size of your gap and your goals, veneers or orthodontic treatment may be a better long-term choice.
Bonding vs. Veneers
Porcelain veneers are thin shells bonded to the front surface of the teeth. They cost more than composite bonding ($900 to $2,500 per tooth) but last 10 to 20 years and resist staining better. Veneers require removing a thin layer of enamel, making them a permanent commitment. Bonding is reversible, less expensive, and done in one visit, but it does not last as long and is more prone to staining.
For small gaps on otherwise healthy teeth, bonding is often the better starting point. For larger gaps or patients who want a more dramatic change in their smile, veneers may provide a more durable and aesthetic result.
Bonding vs. Orthodontics
Orthodontic treatment (braces or clear aligners) physically moves the teeth together to close the gap. This is the only option that changes the actual tooth position rather than covering the gap with material. Orthodontics takes months to years and costs $3,000 to $7,000 or more, but the results are permanent and do not require ongoing maintenance.
A key consideration is whether the gap is caused by teeth that are too small for the jaw (in which case bonding or veneers fill the extra space) or teeth that have drifted apart (in which case orthodontics addresses the underlying cause). Your dentist or prosthodontist can determine which scenario applies to you.
Caring for Bonded Teeth
Bonded teeth require the same basic care as natural teeth, with a few extra precautions to extend the life of the bonding material.
- Brush twice daily with a soft-bristled toothbrush and non-abrasive toothpaste.
- Floss daily, being careful not to snap the floss up into the bonded area aggressively.
- Avoid biting directly into hard foods (ice, hard candy, popcorn kernels, raw carrots) with bonded teeth.
- Limit staining foods and drinks or rinse your mouth with water after consuming them.
- Do not bite your nails or chew on pens, which can chip the composite.
- If you grind your teeth at night, ask your dentist about a night guard to protect the bonding.
- Schedule regular dental visits so your dentist can check the bonding and polish it as needed.
When to See a Prosthodontist About Gap Closure
A general or cosmetic dentist can perform teeth bonding for gaps. A prosthodontist is the specialist to see for complex cases involving multiple gaps, significant size discrepancies between teeth, or when you are deciding between bonding, veneers, and other restorative options. Prosthodontists complete 3 years of advanced residency training focused on restoring and replacing teeth.
If you have tried bonding before and it has not held up, or if you want to discuss the full range of options for improving your smile, a prosthodontist can provide a thorough evaluation and treatment plan. Learn more on our /specialties/prosthodontics page.
Find a Prosthodontist Near You
Every prosthodontist on My Specialty Dentist has verified specialty credentials. Search by location to find specialists in your area who can evaluate your gap and recommend the best treatment approach.
Search Prosthodontists in Your Area