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Enrolling by Invitation

NCT Number: NCT07649226

Laser-Assisted Minimally Invasive Esthetic Crown Lengthening Using Flapless vs. Tunneled Flap Approach

Crown lengthening surgery is one of the most commonly performed periodontal procedures. Multiple techniques have been used throughout the years to overcome the postoperative pain and adverse outcomes that may be associated with surgical crown lengthening. One of the most popular choices among clinicians is using different types of lasers in different techniques to overcome those adverse effects. Treatment effectiveness can be monitored non-invasively through salivary levels of Leukocyte Esterase enzyme and the stability clinical outcomes.

Enrolling by Invitation

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Key information

Conditions

Altered Passive Eruption of Teeth

Age range

21 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Alexandria University

Alexandria, Alexandria Governorate, Egypt

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • Patients with an excessive gingival display of at least 3 mm
  • Age >21 years
  • At least six anterior maxillary teeth requiring ECL
  • Healthy periodontal status, indicated by a full-mouth plaque index and bleeding on probing index scores of <15%.
  • Patients with thick gingival phenotype

Exclusion criteria

  • Treatment sites with probing depths more than 3 mm
  • Patients with a history of smoking
  • Patients with a history of mucogingival surgery in the intended treatment area
  • Systemic conditions that could hinder tissue healing (e.g., uncontrolled diabetes and autoimmune diseases)
  • Patients undergoing active orthodontic treatment
  • Presence of any cause of excessive gingival display other than altered passive eruption

Treatment and study plan

laser assissted crown lengthening

Procedure

laser-assissted flapless crown lengthening and laser-assissted tunneled flap approach

surgical esthetic crown lengthening

Procedure

surgical crown lengthening using scalpels and rotary instruments.

Laser-assisted tunneled flap approach

Procedure

In this approach, the gingival margin will be tunneled to provide visibility for the operator during bone removal using laser.

Primary outcomes

  1. leukocyte esterase enzyme assessment using Periomonitor

    Time frame: 1 month

    Periomonitor strips will be used to detect the amount of leukocyte esterase enzyme in saliva

  2. Clinical outcome stability

    Time frame: 6 months

    Clinical outcome stability will be assessed by measuring the length of the crown and interdental papillae immediately postoperatively, 1 week postoperatively, 1 month postoperatively, 3 months postoperatively and 6 months postoperatively.

  3. PROM

    Time frame: 1 week

    Binary questionnaire (Yes/No) questions will be asked.

Secondary outcomes

  1. Marginal bone loss evaluated using CBCT

    Time frame: 6 months

Sponsors and collaborators

Lead sponsor

Alexandria University

Other

Registry information

Official study title

Laser-Assisted Minimally Invasive Esthetic Crown Lengthening Using Flapless vs. Tunneled Flap Approach (Randomized Controlled Clinical Trial)

Important dates

Study start
2026
Primary completion
2026
Study completion
2026
First posted
Jun 16, 2026
Registry last updated
Jun 16, 2026

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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