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Gingival EnlargementGINGILASCANCT07263763

Gingival Hyperplasia Treatment With Surgical Scalpel vs Diode Laser in Orthodontic Patients.

A study testing Scalpel Gingivectomy and Diode laser Gingivectomy in people with Gingival Enlargement, run by Nguyen Thu Thuy at 1 site in Vietnam.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Gingival enlargement is a common complication in orthodontic patients, often resulting from plaque accumulation and chronic inflammatory response during fixed appliance therapy. Surgical gingivectomy is frequently required to restore gingival contour, improve esthetics, and facilitate oral hygiene. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Gingival Enlargement
What is being tested?
Scalpel Gingivectomy and Diode laser Gingivectomy
Type of treatment
Surgery or procedure
Could I receive a placebo?
No, everyone receives an active treatment
How many people
13 participants
Where
1 siteVietnam
Study dates
1 Aug 2024to 15 Feb 2025
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 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Participants aged 18 years or older who agree to take part in the study.
  • Individuals in good general health with no history of systemic diseases.
  • Patients undergoing fixed orthodontic treatment with metallic brackets for at least 6 months and presenting with gingival enlargement.
  • Patients with good oral hygiene (Plaque Index [PlI] < 1) and who comply with the instructions provided by the dentist during the treatment period.

Who cannot join

  • History of using medications associated with gingival enlargement, such as anticonvulsants, immunosuppressants, or calcium channel blockers (e.g., phenytoin, cyclosporine, nifedipine, verapamil, diltiazem, felodipine, nitredipine, etc.).
  • Pregnant or breastfeeding women, or individuals using hormonal therapy.
  • Patients who have undergone periodontal treatment within the last 6 months.
  • Use of antibiotics within 3 months prior to study enrollment.
  • Presence or history of systemic diseases.
  • Patients who refuse the use of laser in treatment.
  • Patients who are uncooperative, have poor oral hygiene (PlI > 1), discontinue participation during the study, or fail to follow instructions throughout the study period.

Trial locations and contacts

1 site in 1 country.

Vietnam1 site
  • University of Medicine and Pharmacy at Ho Chi Minh City - Faculty of Odonto-Stomatology

    Ho Chi Minh City, Ho Chi Minh, 700000

Other trials in Vietnam

About this study

Official title: Clinical and Microbiological Characteristics of Orthodontic Patients With Fixed Appliances Treated for Gingival Hyperplasia Using Surgical Scalpel and Diode Laser: A Randomized Clinical Trial.

Gingival enlargement is a common complication in orthodontic patients, often resulting from plaque accumulation and chronic inflammatory response during fixed appliance therapy. Surgical gingivectomy is frequently required to restore gingival contour, improve esthetics, and facilitate oral hygiene. Traditionally, gingivectomy is performed using a scalpel, but laser-assisted techniques have recently gained popularity due to their potential benefits, including reduced bleeding, postoperative discomfort, and faster healing.

This randomized split-mouth clinical trial aims to compare the clinical and microbiological outcomes of gingivectomy performed with a diode laser versus conventional scalpel surgery in orthodontic patients presenting with gingival enlargement. Clinical parameters, microbial profiles, and patient-reported outcomes will be evaluated at baseline and at multiple postoperative intervals to assess the effectiveness and advantages of each technique.

Read the detailed description

Gingival enlargement is a frequent periodontal manifestation in patients undergoing fixed orthodontic treatment, primarily resulting from increased plaque retention and subsequent chronic inflammation. This condition can compromise esthetics, interfere with effective oral hygiene, and lead to periodontal complications if left untreated. Gingivectomy is the treatment of choice for removing excess gingival tissue and reestablishing physiological gingival contours. Conventional scalpel gingivectomy has been widely used; however, the advent of laser technology, particularly diode lasers, has provided an alternative surgical approach with potential clinical advantages, including better hemostasis, reduced intraoperative discomfort, faster wound healing, and less postoperative pain.

This study is designed as a randomized split-mouth clinical trial to compare the clinical and microbiological outcomes of gingivectomy performed using a scalpel versus a diode laser in orthodontic patients with gingival enlargement. Eligible participants will be recruited from the Orthodontics Department of the Ho Chi Minh City National Hospital of Odonto-Stomatology. Each patient will undergo gingivectomy on two contralateral quadrants: one quadrant treated with conventional scalpel surgery (control side) and the other with diode laser surgery (test side). The allocation of quadrants will be randomized.

Clinical parameters including Plaque Index (PlI), Gingival Index (GI), Probing Pocket Depth (PPD), Gingival Margin Position (GMP), and Bleeding on Probing (BoP) will be recorded at baseline and at multiple postoperative intervals. Subgingival plaque samples will be collected for microbiological analysis using real-time polymerase chain reaction (qPCR) to evaluate the presence and levels of periodontopathogenic bacteria. Patient-reported outcomes such as postoperative pain will also be assessed using a visual analog scale (VAS).

All surgical procedures will be performed by the same calibrated operator to minimize variability. Standardized oral hygiene instructions will be provided to all participants throughout the study period. The collected data will be analyzed to determine differences in clinical healing, microbial changes, and patient comfort between the two treatment modalities. The findings are expected to provide evidence-based insights into the advantages and limitations of diode laser gingivectomy compared with the traditional scalpel technique in orthodontic patients.

Being tested
Scalpel Gingivectomy, Diode laser Gingivectomy
Keywords
Gingival overgrowth, Gingival enlargement, Orthodontic treatment, Laser gingivectomy, Surgical gingivectomy, Diode laser, Fixed orthodontic appliances, Randomized clinical trial
Medical subject headings
Gingival Hyperplasia, Gingival Overgrowth

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Scalpel GingivectomyProcedure or surgery

    Conventional gingivectomy performed using a surgical scalpel. Gingival overgrowth was excised using standard surgical technique under local anesthesia.

  • Diode laser GingivectomyProcedure or surgery

    Gingivectomy performed using a diode laser. Laser parameters were set according to manufacturer's recommendations. No sutures required.

Study groups in NCT07263763
Study groupRoleWhat they receive
Scalpel GingivectomyExperimentalConventional gingivectomy performed using a surgical scalpel. Gingival overgrowth was excised using standard surgical technique under local anesthesia.
Receives: Procedure: Scalpel Gingivectomy
Diode Laser GingivectomyExperimentalGingivectomy performed using a diode laser. Laser parameters were set according to manufacturer's recommendations. No sutures required.
Receives: Procedure: Diode laser Gingivectomy

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Gingival margin position

    Reduction in Gingival Overgrowth Index

    Measured: 1 month and 3 months after gingivectomy

Secondary outcomes (7)
  1. Probing Pocket Depth (PPD) Reduction

    Changes in probing pocket depth at baseline and follow-up to assess periodontal healing response.

    Measured: 1 month and 3 months after gingivectomy

  2. Reduction in Gingival Index (GI)

    Changes in gingival inflammation as assessed by the Löe and Silness Gingival Index at baseline, 1 month and 3 months after treatment.

    Measured: 1 month and 3 months after gingivectomy

  3. Reduction in Plaque Index (PlI)

    Changes in plaque accumulation as measured by the Silness and Löe Plaque Index at baseline, 1 month and 3 months post-treatment.

    Measured: 1 month and 3 months after gingivectomy

  4. Reduction in Bleeding on Probing (BoP)

    Changes in bleeding on probing percentage recorded at baseline, 1 month and 3 months after treatment to evaluate periodontal health response.

    Measured: 1 month and 3 months after gingivectomy

  5. Microbiological changes in subgingival plaque

    hanges in subgingival bacterial composition (e.g., total bacterial load, presence of periodontal pathogens) between baseline, 1 month and 3 months after treatment.

    Measured: 1 month and 3 months after gingivectomy

  6. Postoperative pain score

    Patient-reported pain intensity measured using the Visual Analog Scale (VAS) to compare postoperative discomfort between treatment groups.

    Measured: 1 day, 3 days and 7 days after gingivectomy

  7. Post-surgical bleeding

    Assessment of postoperative bleeding severity and duration based on clinical observation and patient reports, to compare healing response between scalpel and diode laser techniques.

    Measured: 1 day, 3 days and 7 days post-surgery

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted4 Dec 2025
  2. Study start1 Aug 2024
  3. Primary completion15 Feb 2025
  4. Study completion15 Feb 2025

Resources

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
Crossover
Model description
This is a randomized, split-mouth clinical trial using a crossover design. Each participant received both interventions (scalpel gingivectomy and diode laser gingivectomy) at different sites within the same arch.
Masking
Single blind
Who is masked
Outcomes assessor
Enrolment
13 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07263763
Sponsor's protocol ID
1427/ĐHYD-HDDD
Other IDs
1427/ĐHYD-HĐĐĐ
Acronym
GINGILASCA
Status last verified
Nov 2025
First submitted
23 Nov 2025
Last updated
4 Dec 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No: The individual participant data (IPD) will not be shared because the study is conducted as part of a postgraduate thesis with a limited scope and without a formal data sharing agreement.

Publications

  • Newman MG, Takei H, Klokkevold PR, Carranza FA. Newman and Carranza's Clinical Periodontology and Implantology. 14th ed. St. Louis: Elsevier / Saunders; 2023.

  • SILNESS J, LOE H. PERIODONTAL DISEASE IN PREGNANCY. II. CORRELATION BETWEEN ORAL HYGIENE AND PERIODONTAL CONDTION. Acta Odontol Scand. 1964 Feb;22:121-35. doi: 10.3109/00016356408993968. No abstract available.

    PubMed 14158464
  • Krishnan V, Ambili R, Davidovitch Z, Murphy NC. Gingiva and Orthodontic Treatment. Semin Orthod. 2007;13(4):257-271. doi:10.1053/j.sodo.2007.08.007.

  • Fornaini C, Rocca JP, Bertrand MF, Merigo E, Nammour S, Vescovi P. Nd:YAG and diode laser in the surgical management of soft tissues related to orthodontic treatment. Photomed Laser Surg. 2007 Oct;25(5):381-92. doi: 10.1089/pho.2006.2068.

    PubMed 17975951
  • Maboudi A, Fekrazad R, Shiva A, Salehabadi N, Moosazadeh M, Ehsani H, Yazdani O. Gingivectomy with Diode Laser Versus the Conventional Scalpel Surgery and Nonsurgical Periodontal Therapy in Treatment of Orthodontic Treatment-Induced Gingival Enlargement: A Systematic Review. Photobiomodul Photomed Laser Surg. 2023 Sep;41(9):449-459. doi: 10.1089/photob.2023.0060.

    PubMed 37738371
  • Lione R, Pavoni C, Noviello A, Clementini M, Danesi C, Cozza P. Conventional versus laser gingivectomy in the management of gingival enlargement during orthodontic treatment: a randomized controlled trial. Eur J Orthod. 2020 Jan 27;42(1):78-85. doi: 10.1093/ejo/cjz032.

    PubMed 31111882
  • Zanatta FB, Ardenghi TM, Antoniazzi RP, Pinto TM, Rosing CK. Association between gingival bleeding and gingival enlargement and oral health-related quality of life (OHRQoL) of subjects under fixed orthodontic treatment: a cross-sectional study. BMC Oral Health. 2012 Nov 27;12:53. doi: 10.1186/1472-6831-12-53.

    PubMed 23186371
  • Gong Y, Lu J, Ding X. Clinical, microbiologic, and immunologic factors of orthodontic treatment-induced gingival enlargement. Am J Orthod Dentofacial Orthop. 2011 Jul;140(1):58-64. doi: 10.1016/j.ajodo.2010.02.033.

    PubMed 21724088

Questions about this trial

What is this clinical trial studying?

A study testing Scalpel Gingivectomy and Diode laser Gingivectomy in people with Gingival Enlargement, run by Nguyen Thu Thuy at 1 site in Vietnam.

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 7 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 4 Dec 2025. 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 Vietnam. 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?

Gingival margin position (time frame: 1 month and 3 months after gingivectomy). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT07263763, which also lists 8 linked publications.

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 4 Dec 2025.

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