Botox treatment for gummy smile with zinc and phytase supplements

The Effect Of Botulinum Toxin A In Patients With Excessive Gingival Display With And Without Zinc And Phytase Supplementation: A Randomized Clinical Trial

NA · Cairo University · NCT06577285

This study is testing if adding zinc and phytase supplements before Botox injections can help people with a gummy smile look better after treatment.

Quick facts

PhaseNA
Study typeInterventional
Enrollment36 (estimated)
Ages18 Years to 60 Years
SexAll
SponsorCairo University (other)
Locations1 site (Cairo)
Trial IDNCT06577285 on ClinicalTrials.gov

What this trial studies

This study investigates the effectiveness of botulinum toxin A injections in patients with excessive gingival display, commonly known as a gummy smile. Participants will undergo initial periodontal therapy and may receive esthetic crown lengthening if necessary. The intervention groups will include patients taking zinc gluconate with and without phytase supplements prior to receiving Botox injections, while a control group will receive only the injections. Clinical photographs will be taken at various intervals to assess outcomes.

Who should consider this trial

Good fit: Ideal candidates are adults over 18 with excessive gingival display greater than 3mm and normal clinical crown dimensions.

Not a fit: Patients with severe vertical maxillary excess, pregnant or lactating females, or those with certain systemic conditions may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could significantly improve the aesthetic appearance of patients with gummy smiles.

How similar studies have performed: While the use of botulinum toxin for aesthetic purposes is well-documented, the specific combination of zinc and phytase supplementation in this context is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Patients with excessive gingival display \>3mm and with normal clinical crown dimensions.
2. Adults \>18 years.
3. Non-smokers.
4. Systemically healthy.
5. Hypermobile lip and mild VME.

Exclusion Criteria:

1. Severe VME.
2. Pregnant or lactating females.
3. Patients with inflamed gingiva or gingival enlargement.
4. Inflammation or infection at the site of injection.
5. Patients with known allergy to any of the components of BTX-A or BTX-B (i.e. BTX, human albumin, saline, lactose and sodium succinate).
6. Patients using anticholinesterase or other agents interfering with neuromuscular transmission.
7. Psychologically unstable or who have questionable motives and unrealistic expectations.
8. Dependent on intact facial movements and expressions for their livelihood (e.g. actors, singers, musicians and other media personalities).
9. Afflicted with a neuromuscular disorder (e.g. myasthenia gravis, Eaton- Lambert syndrome).

Where this trial is running

Cairo

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Excessive Gingival Display, Botulinum Toxin A, Zinc And Phytase Supplementation, Botox Injection, Gummy Smile

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.