Denna sida har översatts automatiskt och översättningens korrekthet kan inte garanteras. Vänligen se engelsk version för en källtext.

Gingival Hyperpigmentation Treatment

15 maj 2026 uppdaterad av: Nourhan Abdallah Abdelkhalek, Cairo University

Gingival Hyperpigmentation Treatment With Injectable Vitamin C in Conjunction With Glutathione Versus The Conventional Surgical Depigmentation: A Randomized Controlled Clinical Trial

It is a clinical study conducted to evaluate the effect of vitamin C and Glucathonine injection of pigmented gingival tissue versus surgical removal by scalpel

Studieöversikt

Detaljerad beskrivning

Over the last decade, an increasing interest has been observed in esthetic treatments. In fact, The smile is an important aesthetic component of the face and significantly impacts the perception of beauty and psychological well-being. Gingival hyperpigmentation has been an aesthetic problem for many patients, which can definitely affect their psychosocial behavior.

Gingival hyperpigmentation is not a condition and can be defined as " a darker gingival color beyond what is normally expected". Moreover, it can be attributed to multiple external or internal factors. It may be physiological (excessive melanin deposition) or pathological (smoking).

Gingival Depigmentation can be treated by different modalities including chemical and surgical methods. Lately, gingival Depigmentation was carried out by lasers, cryosurgery and radiosurgery.

Additionally, multiple evidence have suggested the use of ascorbic acid (vitamin C) to treat gin- gival pigmentation. It was demonstrated that ascorbic acid is a water-soluble antioxidant and an essential nutrient for collagen biosynthesis. Furthermore, it was proven that it is effective in the elimination of hyperpigmented lesion.

Lately, glutathione has come into focus in aesthetics because of its antimelanogenic (inhibits melanosome transfer from melanocytes to keratinocytes) and antioxidant properties. It aids in skin lightening because it inhibits tyrosinase enzymes. Moreover, the use of vitamin C and glutathione has been well established, as they participate in antioxidant cellular defense systems. The series of oxidation-reduction reactions that allow vitamin C and glutathione to interact each other makes them unique The aim of the current study is to evaluate the efficacy of its rather-epidermal vitamin C in conjunction with glutathione injection compared to the conventional surgical technique in order to manage patients with gingival hyperpigmentation.

Studietyp

Interventionell

Inskrivning (Beräknad)

30

Fas

  • Fas 2

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studiekontakt

Studieorter

    • Faiyum Governorate
      • Al Fayyum, Faiyum Governorate, Egypten, 63511
        • Rekrytering
        • Faculty of Dentistry
        • Kontakt:
          • Amr E Emaraa, Associate professor

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

  • Vuxen
  • Äldre vuxen

Tar emot friska volontärer

Ja

Beskrivning

Inclusion Criteria:

The selection criteria were done according to Gingival pigmentation index is as follows (Dummett and Bolden)10:

  1. Score0:absence of pigmentation
  2. Score1:spotsofbrowntoblackcolororpigments
  3. Score2:browntoblackpatchesbutnotdiffusepigmentation
  4. Score3:diffuse brown to black pigmentation,marginal,and attached.

Patients who have Dummett and Bolden index score 1, 2, or 3 will be included in addition to the following criteria:

  1. above 18yrs
  2. systemically free
  3. physiologic gingival hyperpigmentation related to esthetic region
  4. well maintained oral hygiene and willing to undergo minor surgical procedures

Exclusion Criteria:

  1. systemic diseases associated with pathological hyperpigmentation or improper delayed wound healing (uncontrolled diabetes, autoimmune diseases, etc.)
  2. pregnant and lactating mothers
  3. usage of chlorhexidine or povidone iodine
  4. Local causes (smoking)
  5. periodontal diseases (plaque and non-plaque induced gingivitis or periodontitis)
  6. non compliant patients

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: Randomiserad
  • Interventionsmodell: Parallellt uppdrag
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: Arm1:(Vit C & glutathione injection)

The site of interest will be anesthetized using topical anesthetic agent (lignocaine gel or xylocaine gel). Infiltration anesthesia will be recommended during the first injection visit. Intraepidermal injection of 1-1.5 ml of vitamin C and glutathione will be performed. It will be locally introduced in relation to the keratinized gingival tissues with extension to the whole target region successively using special syringes (50 gauge).

The needle will be introduced parallel to the gingival tissues with the bevel facing upwards. Vitamin C & glutathione will then be delivered through the attached gingival tissues at the epithelium-connective tissue junction (equivalent to epidermal- dermal junction) till the tissues blanch. Maximum 0.1 ml of injection is recommended for each point with 2-3 mm apart. The same dose will be repeated once per week for maximum 4 visits till no further color improvement gained.

Vitamins c and glutathione injection that usually used for cosmetic skin care (whitening)
Aktiv komparator: ATM 2: surgical depigmentation

Using a 15c blade an epithelial layer and part of connective tissue will be removed till the pigmentation disappears with ultra care not to expose the bone. The marginal and interdental papillary tissues remain critical regions, fortunately, they are not deeply pigmented. Periodontal dressing is recommended for minimal 7 days postoperative.

Patients will be instructed to avoid the mechanical trauma to the treated sites. Patients will be administering an analgesic (Ibuprofen 400 mg) to be used as needed. Following each injection visit, the patients will be asked to abstain from mechanical oral hygiene procedures in relation to the target region for the day of procedure only. Plain tooth pastes (Colgate toothpaste) with anti- inflammatory mouthwash (Citrolin mouth, Pharco Company, Egypt) were recommended.

Removal of gingival pigmentation by scalpel

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Degree of gingival pigmentation by Takashi index (Hanioka et al., 2005)
Tidsram: baseline: before surgery/injection (day1), after 1 mon ,3 mon ,6 mon and 9 month

Degree of gingival pigmentation 0: no pigmentation

  1. solitary unit (s) of pigmentation in papillary gingiva without extension between neighboring solitary units
  2. formation of continuous ribbon extending from neighboring solitary units)
baseline: before surgery/injection (day1), after 1 mon ,3 mon ,6 mon and 9 month
Degree of gingival pigmentation by Gingival pigmentation index (Kumar et al., 2013)
Tidsram: The color assessment will be evaluated in the daylight and by examining the regular digital photographs which will be taken pre-operative (day of the procedure / day 1), and post-operatively after 1 month and 9 months.
Score 0: absence Score 1: spots of brown to black Score 2: brown to black patches but not diffuse Score 3: diffuse brown to black pigmentation
The color assessment will be evaluated in the daylight and by examining the regular digital photographs which will be taken pre-operative (day of the procedure / day 1), and post-operatively after 1 month and 9 months.

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Pain score
Tidsram: visual analogue scale (VAS) after the surgery/injection (day 1) till 10 days after (day 10 after the surgery/injection)
VAS scores pain will be divided into ten numerical parts consisting of one cm each on a horizontal line with two endpoints (left and right), with "0" representing "no pain" to "10" representing "severe pain."
visual analogue scale (VAS) after the surgery/injection (day 1) till 10 days after (day 10 after the surgery/injection)
Itching
Tidsram: visual analogue scale (VAS) after the surgery/injection (day 1) till 10 days after (day 10 after the surgery/injection)
A vertical scale for wound itching was measured with a scale with five scores: no itching (0) mild itching (1point) moderate itching (2 points) severe itching (3 points) extremely severe (4 points)
visual analogue scale (VAS) after the surgery/injection (day 1) till 10 days after (day 10 after the surgery/injection)
Patient satisfaction
Tidsram: At the end of the follow up period ( 9 months)
using a 5- graded self-assessment analysis (Huh et al. 2003). excellent (grade 4: improved over 75%) good (grade 3: improved 50e75%) moderate (grade 2: improved 25e50%) fair (grade 1: improved less than 25%) no change or worse (grade 0: not improved or darkened)
At the end of the follow up period ( 9 months)

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Samarbetspartners

Utredare

  • Huvudutredare: Nourhan A Abdullah, Phd, Lecturer at faculty of dentistry, Fayoum university

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Faktisk)

1 augusti 2025

Primärt slutförande (Beräknad)

1 januari 2027

Avslutad studie (Beräknad)

1 oktober 2027

Studieregistreringsdatum

Först inskickad

11 maj 2026

Först inskickad som uppfyllde QC-kriterierna

15 maj 2026

Första postat (Faktisk)

19 maj 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

19 maj 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

15 maj 2026

Senast verifierad

1 maj 2026

Mer information

Termer relaterade till denna studie

Plan för individuella deltagardata (IPD)

Planerar du att dela individuella deltagardata (IPD)?

OBESLUTSAM

Läkemedels- och apparatinformation, studiedokument

Studerar en amerikansk FDA-reglerad läkemedelsprodukt

Nej

Studerar en amerikansk FDA-reglerad produktprodukt

Nej

Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .

Prenumerera