Clinical trial Recruiting at 1 site Interventional Ages 18 to 50

Liquid fibrin versus soft laser to improve healing and reduce relapse after lip repositioning for gummy smile

Official title: Comparison Between The Effect of Liquid Platelet-Rich Fibrin and Low-Level Laser Therapy on Enhancing Healing and Reducing Relapse After Lip Repositioning Surgery

Run by Damascus University · NCT07532161 · Data updated 2026-11-12

This trial will test whether injecting liquid platelet-rich fibrin or using a low-level laser after lip repositioning helps adults with a gummy smile heal faster and keep results longer.

More Gummy Smile trials

Quick facts

Study typeInterventional
Ages18 Years to 50 Years
SexAll
Enrollment22 (estimated)
SponsorDamascus University
Academic / other
Locations1 site (Damascus, Rif-dimashq Governorate)
StatusRecruiting
StartedApril 20, 2026
Main results expectedJanuary 31, 2027
Study endsJanuary 31, 2027
Registry record updatedApril 29, 2026
Trial IDNCT07532161 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults aged 18–50 who are systemically healthy, maintain good oral hygiene, have a gummy smile (>3 mm) due to upper lip hypermobility, and have not had prior lip repositioning are ideal candidates.

Probably not a fit

Patients with gummy smile primarily from skeletal causes (e.g., vertical maxillary excess), smokers, pregnant or lactating individuals, those with prior facial Botox or fillers, people with systemic contraindications to local anesthesia, or those with poor oral hygiene are unlikely to benefit or be eligible.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

Lip repositioning surgery reduces excessive gingival display but can be complicated by pain, swelling, delayed healing, and postoperative relapse. In this single-center interventional trial at Damascus University, patients with a gummy smile due to hyperactive upper lip will undergo lip repositioning and be assigned to receive either injectable liquid platelet-rich fibrin (i-PRF) or low-level soft laser therapy as an adjunct. The study will track wound healing, pain and swelling, and the degree of gingival display relapse over follow-up visits. The two adjunctive approaches will be compared to determine which better supports tissue healing and stability of the surgical result.

Why it matters

Potential benefit: If successful, the intervention could speed healing, reduce postoperative pain and swelling, and lower the chance of relapse, producing longer-lasting esthetic results.

How similar studies have gone: Platelet-rich fibrin and low-level laser have shown benefits for wound healing in other oral and soft-tissue procedures, but evidence specifically showing reduced relapse after lip repositioning is limited.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Patients of both genders.
2. Patients presenting with a gummy smile in the maxillary anterior region (more than 3 mm) due to upper lip hypermobility.
3. Age 18-50 years.
4. Systemically healthy individuals, classified as ASA physical status I or II according to the American Society of Anesthesiologists (ASA) classification; that is, patients without systemic disease or with mild, well-controlled systemic conditions.
5. Patients with good oral hygiene, defined as an O'Leary Plaque Index ≤ 40%.
6. No previous lip repositioning surgery.

Exclusion Criteria:

1. Pregnancy and lactation.
2. Individuals with a previous history of receiving facial Botox or filler injections.
3. Systemic diseases or conditions that contraindicate the use of local anesthesia.
4. Any physical condition that impairs the ability to perform proper oral hygiene measures.
5. Patients who are smokers or alcohol consumers.
6. Inability or unwillingness to cooperate.
7. In adequate width of attached gingiva.
8. Vertical maxillary excess (moderate to severe) requiring orthognathic intervention.
9. Short upper lip
10. Gingival display primarily caused by altered passive eruption requiring crown lengthening.

Where it's running

  • Faculty of Dentistry, Damascus university , Syria.
    Damascus, Rif-dimashq Governorate, Syria
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

  • AI-assisted measurement of gummy smiles from photos

    A computer program using artificial intelligence will try to identify and measure gummy smiles from patient photos to see if its measurements match those of expert dentists.

    Recruiting Cairo University · Cairo, Cairo Governorate · NCT07759843

  • Using AI to analyze gummy smiles

    This study is testing a new AI tool to see if it can help dentists better understand and analyze gummy smiles by looking at pictures of them.

    Recruiting Gazi University · Ankara, Cankaya · NCT06965387

  • Assessing a new technique for measuring gum tissue changes in aesthetic dentistry

    This study is testing a new way to measure changes in gum tissue during cosmetic dental procedures to see if it works better than the current standard method.

    Recruiting British University In Egypt · Cairo · NCT06673576

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.