Gummy Smile Treatment in Adelaide A “gummy smile” — sometimes called excessive gingival display — is a smile that shows more gum tissue than the patient or clinician considers aesthetic. The threshold is somewhat subjective, but most clinicians and researchers define it as 2 mm or more of gum visible above the upper front teeth when smiling. The Australian Dental Journal notes that gummy smiles affect an estimated 10–30% of adults, with higher prevalence in women and in patients with certain skeletal patterns.
At Mend Dental — your dentist in Adelaide — we help patients from Adelaide, Payneham, Magill and the surrounding Adelaide foothills address gummy smiles through our cosmetic dentistry service, often in combination with specialist referral for the more complex cases.
This post covers what a gummy smile is, the common causes, why treatment matters, your options, the treatment process at our Adelaide practice, recovery, prevention and common questions.
What is a gummy smile?
A gummy smile is one where excessive gingiva (gum tissue) shows above the upper front teeth during a natural smile. The clinical threshold is generally accepted as 2 mm or more of visible gum during full smile; above 4 mm is usually considered pronounced.
Gummy smiles are distinct from gingival enlargement (where the gums themselves are swollen or overgrown due to medication, pregnancy or inflammation). A genuine gummy smile is a positional or skeletal variant where the gum tissue sits lower than ideal relative to the tooth crown.
The Journal of Dental Research and related journals have published extensively on patient perception of gingival display, with most studies finding that 1–2 mm of gum display is acceptable to most observers, while 3 mm or more is rated less favourably.
What causes a gummy smile?
The causes fall into several categories, and identifying the underlying cause is essential to choosing the right treatment.
Dentogingival causes include short clinical crowns (teeth that haven’t fully erupted, leaving more gum covering them), altered passive eruption (where the gum fails to recede to its final position during adolescence), and gingival inflammation or enlargement from medication, hormones or plaque.
Skeletal causes include vertical maxillary excess (overgrowth of the upper jaw), a long lower-face third, and certain malocclusion patterns. Muscular causes include a hyperactive upper-lip elevator muscle complex — when the muscles that lift the upper lip during smiling are particularly strong, more gum is exposed.
Dental causes include wear or attrition that has shortened the teeth, prompting the gums to follow the bite down (passive eruption compensation). Combination causes are common — many patients have a mild skeletal component combined with a muscular component.
Why treat a gummy smile?
Aesthetic concerns are the primary driver, but the consequences are real:
- Self-consciousness — published work in the Journal of Clinical Periodontology links excessive gingival display with reduced smile satisfaction and self-rated attractiveness.
- Functional — in severe cases, the upper lip can struggle to close fully at rest, contributing to mouth-breathing and dry-mouth symptoms.
- Hygiene — short clinical crowns and altered passive eruption can make plaque control more difficult around the gum line.
- Proportional balance — addressing a gummy smile often makes subsequent cosmetic work (veneers, bonding) look more natural.
Treatment options for a gummy smile
Treatment selection depends entirely on the underlying cause. Dr Daniel Yeun at our Adelaide dental practice will identify the cause before recommending an option, and refer to specialists where the case requires it.
Gum lift / gingival recontouring
For dentogingival gummy smiles (altered passive eruption, short clinical crowns), minor gum recontouring under local anaesthetic exposes more of the natural tooth crown and rebalances the smile. Often combined with veneers or bonding for a complete result. Effect on neighbouring teeth: none. Timeline: single visit with mild soreness for a few days.
Lip repositioning (specialist referral)
For hyperactive upper-lip gummy smiles, a minor surgical procedure to reduce the lift of the upper lip can reduce display by 3–5 mm. Performed by a periodontist or oral surgeon; we refer.
Botox / anti-wrinkle injections
For mild muscular gummy smiles, carefully placed injections can relax the upper-lip elevators and reduce display by 1–3 mm. Effect is temporary (3–4 months) and reversible. We coordinate with clinicians who provide this service where appropriate, in line with AHPRA and TGA regulations. SureSmile clear aligners with bite intrusion Where the gummy smile is driven by over-eruption of the upper front teeth (deep bite), a course of SureSmile aligners combined with bite mechanics can intrude the front teeth and reduce gum display by 1–3 mm. Timeline: 6–12 months.
Orthognathic surgery (referral)
For pronounced skeletal gummy smiles (vertical maxillary excess), jaw surgery is the most predictable option. This is beyond the scope of general dentistry; we refer to an oral and maxillofacial surgeon.
Combination approaches
Many patients benefit from a combination — for example, gum recontouring followed by veneers on the upper front six to optimise shape and length. See our dental veneers page.
How to choose between the options
Three questions help:
- What’s the underlying cause? Dentogingival, muscular, skeletal, dental or combined. The cause drives the treatment.
- How much display do you want to reduce? 1–2 mm suits injections or aligners; 3+ mm often needs gum recontouring or surgery.
- Is the change reversible? Injections and aligners are reversible; gum recontouring and surgery are not.
A diagnostic wax-up, photographs and clinical measurement are essential before choosing.
Treatment process at Mend Dental
- Initial consultation (45–60 min) — history, examination, photographs, measurement of gingival display, discussion of concerns. Address: Unit 3/219 Glynburn Rd, St Morris SA 5068 (between Bella Donna Laser Skin Body and Sunrise Speech Pathology). Phone: (08) 8364 6780.
- Records and planning — digital scans, study models, sometimes radiographs. We identify the underlying cause.
- Diagnostic mock-up — for gum recontouring or veneer cases, we preview the proposed result before treatment.
- Active treatment — staged as appropriate: gum recontouring, injections, aligners, veneers or specialist referral.
- Review and maintenance — scheduled check-ups and any retention needed.
We accept all major health funds including BUPA Platinum, HCF More for Teeth and Medibank, and we offer CDBS bulk-billing for eligible children. Inhalation sedation (laughing gas) is available for anxious patients.
Recovery, aftercare and long-term outlook
Gum recontouring has mild soreness for a few days, managed with over-the-counter pain relief. Injections have no downtime but effects are temporary (3–4 months). Veneer and aligner patients return to normal activity within a day.
Gum recontouring is permanent but may need minor refinement; veneers last 10–15+ years with care; aligner retention is lifelong. For underlying skeletal cases, surgical outcomes are stable.
For related reading, see our post on stages of gum disease and our guide to cosmetic dentistry options in Adelaide.
How to prevent further gum display changes
- Maintain good oral hygiene to prevent inflammation-driven gingival overgrowth.
- Address tooth wear early to prevent passive eruption compensation.
- Schedule six-monthly check-ups to monitor gum and tooth position.
- Discuss medication-related gum changes with your GP.
Frequently asked questions
How much gum is “too much” when smiling?
Most clinicians and researchers consider 1–2 mm of gingival display acceptable and 3 mm or more aesthetically noticeable. The threshold is individual — what matters is whether the display bothers you.
Can a gummy smile be fixed without surgery?
Yes, depending on the cause. Dentogingival gummy smiles are commonly treated with gum recontouring (a minor in-clinic procedure, not surgery). Muscular gummy smiles can be addressed with injections. Skeletal gummy smiles may need surgical referral.
Is gummy smile treatment permanent?
Gum recontouring is permanent. Veneers and aligners are long-lasting but may need refreshing or retention. Injections are temporary (3–4 months) and need to be repeated to maintain the effect.
Book a consultation in Adelaide
If you’re considering treatment for a gummy smile, we’d be happy to see you at Mend Dental — your dentists in Adelaide. Book by calling (08) 8364 6780 or via our contact page. Initial consultations include a full aesthetic assessment, photographs and an unhurried conversation about the changes you’d like to address. You may also like to read about our cosmetic dentistry services or dental veneers in Adelaide before you come in.
Disclaimer
This article is general information only and does not substitute professional dental examination, diagnosis or treatment. Always seek the advice of a qualified dental practitioner about your individual circumstances. Treatment outcomes vary between patients. Content reviewed against current Australian clinical standards but does not replace personalised consultation.
