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OpenTrials
Completed

NCT Number: NCT06944535

Efficacy of a Modified Lip Repositioning Surgery Technique With Tie Levator Labii Superioris and Without Frenectomy and Myotomy for Treatment of Excessive Gingival Display: A Retrospective Study

This retrospective study aims to evaluate the effectiveness and safety of a modified lip repositioning surgery technique, performed without frenectomy and without myotomy, for the correction of excessive gingival display ("gummy smile"). Data were collected from the medical records and clinical photographs of patients who had previously undergone this surgical procedure at the study site.

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Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Can Tho University of Medicine and Pharmacy

Can Tho, 900000, Vietnam

About this study

Excessive gingival display, commonly referred to as a "gummy smile," is an esthetic concern that may reduce patient satisfaction with their smile and overall facial appearance. Several treatment modalities have been suggested to address this condition, including orthodontic treatment, botulinum toxin injection, and various surgical techniques. Among surgical approaches, lip repositioning surgery has gained popularity due to its minimally invasive nature and ability to provide predictable esthetic outcomes.

A modified lip repositioning technique, performed without frenectomy and without myotomy, has been introduced to reduce morbidity and simplify the procedure while maintaining effectiveness. However, published evidence has largely come from prospective interventional series.

To further evaluate the clinical performance of this modified technique, we conducted a retrospective observational cohort study. Data were obtained from the medical records and clinical photographs of patients who had previously undergone the modified lip repositioning surgery at the study site. No new patients were enrolled and no interventions were prospectively carried out.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Patients treated with the modified lip repositioning surgery without frenectomy and without myotomy.
  • Complete medical records including pre- and post-operative documentation.
  • Clinical photographs available before and after surgery.
  • Minimum follow-up period documented (≥ 3 months).

Exclusion criteria

  • The patient has trauma and facial deformities
  • Incomplete medical records or missing photographs.
  • Patients lost to follow-up before minimum period.
  • Patients who had undergone other concurrent surgical/orthodontic procedures affecting gingival display.

Treatment and study plan

Modified Lip Repositioning Surgery (Retrospective)

Procedure

Patients previously underwent a modified lip repositioning surgery technique without frenectomy and without myotomy. For this retrospective study, only existing medical records and clinical photographs were reviewed. No new surgical intervention was performed.

Primary outcomes

  1. Reduction in gingival display after modified lip repositioning surgery

    Time frame: Baseline and up to 12 months post-surgery

    Measurement of gingival display (in millimeters) on smile, comparing baseline (before surgery) and last available follow-up (after surgery), based on clinical photographs and medical records.

Sponsors and collaborators

Lead sponsor

Can Tho University of Medicine and Pharmacy

Other

Registry information

Important dates

Study start
2023
Primary completion
2024
Study completion
2024
First posted
Apr 25, 2025
Registry last updated
Sep 19, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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