A gap between the front teeth — a diastema — is one of the most common cosmetic concerns we see at Novo Care. And it comes with a specific clinical decision that isn’t always straightforward: how to close it.
The three main options are composite bonding, porcelain veneers, and orthodontic treatment. Each is appropriate for different situations. This article helps you understand which might be right for yours.
Understanding the gap
Not all gaps are the same. A small central diastema (the gap between the two upper front teeth) is the most common variety — often a few millimetres wide, usually without any structural implication. Larger gaps, multiple gaps, or gaps accompanied by spacing throughout the arch may indicate an underlying bite relationship that affects which treatment approach is appropriate.
Before any cosmetic treatment for gaps, your dentist should assess whether there’s a functional component — whether the gap is held open by frenum tissue (the attachment between the lip and gum), whether the bite is driving the teeth apart, or whether there’s a discrepancy between jaw size and tooth size. Cosmetic treatment on top of an unaddressed cause may not hold long-term.
Option 1: Composite bonding
Composite bonding is the most conservative approach to gap closure. Tooth-coloured resin is applied to the edges of the teeth that border the gap, built up in layers, shaped, and polished to close the space.
When bonding works well:
- The gap is small — typically 2mm or less per tooth
- The teeth are otherwise well-shaped and well-positioned
- The patient wants a minimally invasive, reversible approach
- Budget is a significant consideration
The limitations of bonding for gaps: Closing a gap with bonding means widening the teeth that border it. If the gap is large, the resulting teeth may look disproportionately wide relative to the rest of the smile. There’s a mathematical limit to how much a tooth can be widened through bonding before the result looks unnatural — roughly 20–25% of the tooth’s original width.
For gaps larger than 3–4mm, bonding alone often produces a result that looks “patched” rather than seamlessly natural.
Option 2: Porcelain veneers
Veneers offer a more comprehensive solution for gap closure, particularly when the gap is larger, when the surrounding teeth also have aesthetic concerns (colour, shape, slight misalignment), or when the patient wants a result that is simultaneously more transformative and more durable.
With veneers, your dentist has control not just over the gap closure but over the complete shape and appearance of multiple teeth simultaneously. The result can be a harmonious, balanced smile rather than two slightly wider teeth flanking a closed space.
When veneers are the right choice for gaps:
- The gap is 3mm or larger
- Other teeth in the smile zone also need improvement
- The patient wants a durable, long-lasting result
- The teeth are somewhat misaligned in addition to the gap
- Digital Smile Design can be used to plan the ideal final proportions
The important caveat: Veneers do not move teeth. They change the appearance of teeth. If the gap closure requires such significant widening of teeth that the result would look unnatural, or if the underlying bite is genuinely problematic, orthodontic treatment should be considered first.
Option 3: Orthodontics — the option patients often resist
We include this option not to push it, but because honesty requires it. For large gaps, multiple gaps, or cases where the bite relationship is a factor, orthodontic treatment — clear aligners or braces — is the most clinically appropriate primary treatment.
The good news for patients who are orthodontic-resistant: modern clear aligner systems are discreet, comfortable, and significantly faster for minor-to-moderate cases than traditional braces. And orthodontic treatment doesn’t preclude cosmetic treatment afterward — many patients do both, using aligners to move teeth into ideal position and then veneers or bonding to refine the final aesthetic.
The sequence matters: align first, then refine cosmetically.
The honest consultation
At Novo Care, we won’t simply do what you ask without telling you what’s clinically appropriate. If your gap is best addressed through orthodontics, we’ll tell you — and explain why. If bonding is genuinely sufficient, we’ll recommend that over more expensive treatment. If veneers are the right tool for your specific case, we’ll show you the proposed result using Digital Smile Design before we begin.
Book a gap assessment at Novo Care. We’ll give you an honest clinical opinion and a clear explanation of every option available.