Crown LengtheningNCT06397521
Gingival Margin Stability Following Esthetic Crown Lengthening Utilizing a Double Periodontal Surgical Guide
A study testing Crown lengthening in people with Crown Lengthening, run by Ain Shams University at 1 site in Egypt.
Trial summary
In patients with excessive gingival display, esthetic crown lengthening procedure by means of scalpel, diode laser or electro-surgery could result in the same gingival marginal stability at 3 and 6 months follow up. Read more about this study
- Who is it for?
- Ages 25 to 45 years
- Conditions the study is for
- Crown Lengthening
- What is being tested?
- Crown lengthening
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 21 participants
- Where
- 1 siteEgypt
- Study dates
- 20 May 2024to 31 Jul 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 25 to 45 years
- All sexes
- No healthy volunteers
- Adult
Who may be able to join
- Altered passive eruption as presence of quadratic anterior teeth [crown width/length ratio
- 0.85 ].
- Gingival margin located coronal to the tooth cervical convexity and >2 mm of gingival band display during maximum smile.
- Patients with treated periodontal disease (i.e., stage I of periodontitis);
Who cannot join
- Patients with systemic contraindications for oral surgery as uncontrolled diabetes.
- patients on drug therapy related with drug-associated gingival enlargement.
- Areas in which the remaining amount of keratinized gingiva after the submarginal incision is less than 3 mm.
- Previous surgical treatment in the same area.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Gingival Margin Stability Following Esthetic Crown Lengthening by Electrocautery, Diode Laser, or a Scalpel Blade Utilizing a Double Periodontal Surgical Guide. (A Prospective Randomized Clinical Trial)
In patients with excessive gingival display, esthetic crown lengthening procedure by means of scalpel, diode laser or electro-surgery could result in the same gingival marginal stability at 3 and 6 months follow up.
Read the detailed description
Scalpel crown lengthening has been recommended as the gold standard for treating excessive gingiva. Two other established tools used for gingivectomy procedures are electrosurgery and lasers. Laser crown lengthening may have the advantages of less bleeding during the procedure, faster healing, and less pain following the procedure. Electrosurgery which involves the application of a high- frequency electric current to the gingiva has been shown to produce minimal bleeding, ease and speed of cutting and reduced postoperative pain. The null hypothesis that the three techniques for aesthetic crown lengthening (ACLP) would show equivalent gingival margin stability at 3 and 6 months follow up.
- Conditions
- Crown Lengthening
- Being tested
- Crown lengthening
- Keywords
- Digital, Surgical guide
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Crown lengtheningProcedure or surgery
Investigation of the three techniques for aesthetic crown lengthening
| Study group | Role | What they receive |
|---|---|---|
| Scalpel crown lengthening | Experimental | Crown lengthening will be performed utilizing double periodontal surgical guide with scalpel. Receives: Procedure: Crown lengthening |
| Laser crown lengthening | Experimental | Crown lengthening will be performed utilizing double periodontal surgical guide with diode laser. Receives: Procedure: Crown lengthening |
| Electrosurgery crown lengthening | Experimental | Crown lengthening will be performed utilizing double periodontal surgical guide with electrosurgery. Receives: Procedure: Crown lengthening |
What is being measured
The primary outcome is the main question the study is designed to answer.
position of the gingival margin
position of the gingival margin (GM) (Degree of Gingival Rebound) after performing an aesthetic crown lengthening procedure
Measured: 3 and 6 months postoperative
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted3 May 2024
- Study start20 May 2024
- Primary completion20 Jun 2026
- Study completion31 Jul 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Crown LengtheningStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- Three techniques for aesthetic crown lengthening
- Masking
- Double blind
- Who is masked
- Investigator, Outcomes assessor
- Enrolment
- 21 participants (actual)
Sponsor and investigators
- Lead sponsor
- Ain Shams University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Doaa Adel Salah Khattab, Ain Shams University
- Investigators
- Doaa Adel-Khattab, PhD, Study chair, Associate Professor Faculty of Dentistry, Ain Shams University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06397521
- Sponsor's protocol ID
- 22879
- Status last verified
- Oct 2026
- First submitted
- 30 Apr 2024
- Last updated
- 15 Oct 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 15 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Gingival Margin Stability Following Esthetic Crown Lengthening by Electrocautery, Diode Laser, or a Scalpel Blade Utilizing a Double Periodontal Surgical Guide. (A Prospective Randomized Clinical Trial)
- ClinicalTrials.gov ID
- NCT06397521
- Acronym / sponsor ID
- 22879
- Conditions
- Crown Lengthening
- Keywords
- Digital, Surgical guide
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 21 participants (actual)
- Lead sponsor
- Ain Shams UniversityUniversity, hospital or other
- Study start
- 20 May 2024 (actual)
- Primary completion
- 20 Jun 2026 (actual)
- Study completion
- 31 Jul 2026 (actual)
- First posted
- 3 May 2024 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
In patients with excessive gingival display, esthetic crown lengthening procedure by means of scalpel, diode laser or electro-surgery could result in the same gingival marginal stability at 3 and 6 months follow up.
Detailed description
Scalpel crown lengthening has been recommended as the gold standard for treating excessive gingiva. Two other established tools used for gingivectomy procedures are electrosurgery and lasers. Laser crown lengthening may have the advantages of less bleeding during the procedure, faster healing, and less pain following the procedure. Electrosurgery which involves the application of a high- frequency electric current to the gingiva has been shown to produce minimal bleeding, ease and speed of cutting and reduced postoperative pain. The null hypothesis that the three techniques for aesthetic crown lengthening (ACLP) would show equivalent gingival margin stability at 3 and 6 months follow up.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (investigator, outcomes assessor)
- Number of arms
- 3
- Model description
- Three techniques for aesthetic crown lengthening
| Arm | Type | Receives |
|---|---|---|
| Scalpel crown lengthening | Experimental | Procedure: Crown lengtheningCrown lengthening will be performed utilizing double periodontal surgical guide with scalpel. |
| Laser crown lengthening | Experimental | Procedure: Crown lengtheningCrown lengthening will be performed utilizing double periodontal surgical guide with diode laser. |
| Electrosurgery crown lengthening | Experimental | Procedure: Crown lengtheningCrown lengthening will be performed utilizing double periodontal surgical guide with electrosurgery. |
Who may qualify
- Ages
- 25 to 45 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (4 listed)
- Altered passive eruption as presence of quadratic anterior teeth [crown width/length ratio
- Gingival margin located coronal to the tooth cervical convexity and >2 mm of gingival band display during maximum smile.
- Patients with treated periodontal disease (i.e., stage I of periodontitis);
Key exclusion criteria (4 listed)
- Patients with systemic contraindications for oral surgery as uncontrolled diabetes.
- patients on drug therapy related with drug-associated gingival enlargement.
- Areas in which the remaining amount of keratinized gingiva after the submarginal incision is less than 3 mm.
- Previous surgical treatment in the same area.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Crown lengtheningInvestigation of the three techniques for aesthetic crown lengthening | Procedure or surgery | Electrosurgery crown lengthening, Laser crown lengthening, Scalpel crown lengthening |
Primary outcome
position of the gingival margin
Time frame: 3 and 6 months postoperative
position of the gingival margin (GM) (Degree of Gingival Rebound) after performing an aesthetic crown lengthening procedure
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 15 Oct 2026.
- Individual participant dataSharing planned: No
Related trials for Crown Lengthening
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Accuracy of Stackable Double Periodontal Guide in Esthetic Crown Lengthening
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Comparison of Er:YAG Assisted Laser Crown Lengthening Against Surgical Crown Lengthening
Crown Lengthening, Crown Lengthening Procedure With Ostectomy
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Laser-Assisted Minimally Invasive Esthetic Crown Lengthening Using Flapless vs. Tunneled Flap Approach
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TNF Alpha
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Doaa Adel-Khattab, PhD study chair
Associate Professor Faculty of Dentistry, Ain Shams University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Crown lengthening in people with Crown Lengthening, run by Ain Shams University at 1 site in Egypt.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 15 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Egypt. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
position of the gingival margin (time frame: 3 and 6 months postoperative). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 15 Oct 2026.