If you feel like your smile shows more gum than teeth, you are not alone. A "gummy smile" is one of the most common reasons people in Sydney ask about cosmetic dental treatment, and the good news is that it is usually very treatable. Most dentists consider a smile to look gummy when more than 3 to 4 millimetres of gum tissue shows above the upper teeth when you smile broadly. This guide explains what causes a gummy smile, the treatment options available, what each one typically costs, and how to work out which approach may suit you.
Key takeaways
- A gummy smile usually means 3 to 4mm or more of gum shows when you smile. It is an aesthetic concern, not a sign of poor health.
- The right treatment depends on the cause: excess gum tissue, a short-looking tooth, an overactive upper lip, or jaw development all need different approaches.
- Common options include laser gum contouring, crown lengthening, lip repositioning, muscle-relaxant injections, orthodontics, and veneers.
- Costs in Sydney typically range from around $180 for injectable treatments to $3,000 or more for combined cosmetic work, depending on complexity.
- A consultation and assessment is the only reliable way to know which treatment, or combination, is appropriate for your smile.
What is a gummy smile?
A gummy smile, known clinically as excessive gingival display, describes a smile where a noticeable band of gum tissue is visible above the upper front teeth. Research and clinical convention suggest that a smile starts to look gummy once around 3 to 4mm of gum is on show. When dentists plan cosmetic changes, they often aim for 2 to 3mm of gum display or less, which most people read as a balanced smile.
It is worth saying clearly: a gummy smile is an appearance concern, not a disease. Plenty of people have healthy gums and teeth and simply show more gum than they would like. Whether it is worth treating is entirely a personal decision, and there is no medical pressure to change it.
What causes a gummy smile?
A gummy smile can have several causes, and identifying the right one matters because it determines which treatment will actually work. Often more than one factor is involved.
- Altered passive eruption. The gum sits lower on the teeth than usual, so teeth that are a normal length look short and stubby. This is one of the most common causes and often responds well to gum contouring.
- An overactive (hypermobile) upper lip. The muscles that lift the upper lip pull it higher than average when you smile, exposing more gum. The teeth and gums may be perfectly normal.
- Vertical maxillary excess. The upper jaw has grown slightly longer than typical, which pushes the gum line down. This is a skeletal cause and can need orthodontic or surgical input.
- Short or worn teeth. Teeth that are genuinely small, or that have worn down over time, can throw off the balance between tooth and gum.
- Gum overgrowth. Some medications and inflammation can cause gum tissue to enlarge, increasing how much shows when you smile.
Gummy smile treatment options
Treatment falls into a few broad categories. Some address the gum, some the lip, some the teeth, and some the underlying jaw. Here is how each works and when it tends to be used.
Laser gum contouring (gingivectomy)
Laser gum contouring reshapes and removes excess gum tissue to expose more of the natural tooth and even out the gum line. It is often the first choice when the cause is excess gum or altered passive eruption and the teeth underneath are a healthy length. A dental laser can sculpt the tissue with minimal bleeding, usually needs no stitches, and typically involves only mild tenderness for a day or two afterwards.
Crown lengthening
Crown lengthening is a more involved version of gum recontouring that also adjusts the bone supporting the teeth. It may be recommended when a larger or more permanent change is needed, or when the gum and bone both sit too low. Recovery takes a little longer than simple contouring because bone is involved.
Lip repositioning surgery
When an overactive upper lip is the main cause, lip repositioning surgery can reduce how high the lip rises when you smile. The procedure limits the upward pull of the lip muscles so that less gum is exposed. It is a minor surgical procedure and is often referred to a periodontist or oral surgeon, with most people back to normal within a few days.
Anti-wrinkle (muscle-relaxant) injections
For a hypermobile upper lip, small doses of muscle-relaxant injections can soften the pull of the lip muscles, lowering the lip so less gum shows when you smile. It is quick and non-surgical, but it is also temporary, typically lasting around 3 to 6 months before it needs repeating. This option is only suitable when the cause is muscular and should be carried out by an appropriately trained and registered practitioner.
Orthodontics
If the gummy appearance is linked to how the teeth and jaw are positioned, braces or clear aligners can sometimes move the teeth into a position that improves the gum display. Orthodontics works more slowly than other options but can address causes that gum or lip treatments cannot.
Veneers and restorative work
Where teeth are genuinely short or worn, porcelain veneers or bonding can restore better tooth proportions, which in turn reduces the visual dominance of the gums. This is often combined with gum contouring as part of a wider smile makeover. If you are weighing up materials, our guide on crowns versus veneers may help.
Comparing the options at a glance
| Treatment | Best suited to | Approach | How long results last |
|---|---|---|---|
| Laser gum contouring | Excess gum, altered passive eruption | Minimally invasive | Long-lasting |
| Crown lengthening | Gum and bone sitting too low | Minor surgery | Long-lasting |
| Lip repositioning | Overactive upper lip | Minor surgery | Long-lasting |
| Muscle-relaxant injections | Overactive upper lip | Non-surgical | About 3 to 6 months |
| Orthodontics | Tooth or jaw position | Braces or aligners | Long-lasting with retention |
| Veneers or bonding | Short or worn teeth | Restorative | Several years, varies by material |
What to expect at a consultation
The starting point for any gummy smile treatment is an assessment. Your dentist will look at how much gum shows when you smile, measure the gum and tooth proportions, and work out which of the causes above is driving the appearance. Photographs and sometimes an X-ray help map the relationship between your lip, gums, teeth, and jaw.
From there, a treatment plan can be tailored to the actual cause. Sometimes that is a single procedure such as gum contouring; other times it is a combination, for example contouring plus veneers, or injections trialled before committing to surgery. A good consultation should also set realistic expectations about what is achievable for your particular smile.
How much does gummy smile treatment cost in Sydney?
Cost depends heavily on the cause and the treatment chosen. As a general guide for Sydney, muscle-relaxant injections for an overactive lip often start from around $180 to $400 per session, though they need repeating every few months. Laser gum contouring is commonly priced per tooth, often in the range of $350 to $650 for a small area, with full-arch contouring costing more. More comprehensive cosmetic plans that combine gum work with veneers can run from around $3,000 to $6,000 or higher, depending on how many teeth are involved.
These figures are indicative only. Because the appropriate treatment varies so much from person to person, the only way to get an accurate price is an individual assessment and written quote. It is also worth checking your private health fund, as some cosmetic treatments attract limited or no rebate, while procedures with a clinical component may be partially covered.
Is gummy smile treatment right for me?
Treatment is elective, so the decision is yours. Many people find that even a small, conservative change in the gum line makes them more comfortable smiling, while others decide their gummy smile is part of who they are and choose to leave it. Either choice is valid. If you do want to explore it, the sensible next step is a consultation where the cause can be identified and the lowest-risk option that achieves your goal can be discussed. If gum health is part of the picture, our guide to gum disease treatment covers what to watch for.
Frequently asked questions
How much gum showing is considered a gummy smile?
Most dentists consider a smile to look gummy when more than 3 to 4mm of gum tissue shows above the upper teeth during a full smile. When planning cosmetic changes, the usual target is 2 to 3mm or less, which tends to read as balanced.
Does gum contouring hurt?
Laser gum contouring is carried out with local anaesthetic, so you should not feel pain during the procedure. Afterwards, most people report only mild tenderness for one to three days, which is usually managed with over-the-counter pain relief.
Is gummy smile treatment permanent?
It depends on the treatment. Gum contouring, crown lengthening, and lip repositioning generally give long-lasting results. Muscle-relaxant injections are temporary and typically last around 3 to 6 months before they need repeating.
Can anti-wrinkle injections fix a gummy smile?
They can help when the cause is an overactive upper lip, by relaxing the muscles that pull the lip up too far. They will not help if the cause is excess gum tissue, short teeth, or jaw development, which is why identifying the cause first matters.
How long is recovery after laser gum contouring?
Recovery is usually quick. Many people return to normal activities the same day and can eat comfortably within a day or so, with the gum settling over the following days to weeks.
Will my health fund cover gummy smile treatment?
Cover varies. Purely cosmetic treatment often attracts little or no rebate, while procedures with a clinical reason may be partially covered under general or major dental, depending on your level of cover. Check with your fund before treatment.
Talk to Lumi Dental about your smile
Lumi Dental is a cosmetic and general dental practice in Melrose Park, Sydney, led by Dr James Tran. If a gummy smile is something you have been thinking about, an assessment is the best way to understand the cause and your options without any pressure to proceed. Book a new patient consultation to start the conversation.
This article is general information only and is not a substitute for individual dental advice. Suitability for any treatment can only be determined after a clinical assessment with a registered practitioner.
