Gingival Depigmentation Using Diode Laser 940nm Versus 980nm

• Biolase Epic X 940nm wavelength Diode laser (Device): Participants were treated with Biolase Epic X 940nm wavelength Diode laser set at a power of 1 W, fiber 400 µ, irradiation mode: pulsed wave (P3).
• Doctor smile simpler 980nm wavelength Diode laser (Device): Participants were treated with doctor smile simpler 980nm wavelength Diode laser set at a power of 1 W, fiber 400 µ, irradiation mode: pulsed wave (SP).

Primary outcomes

• Intensity of pigmentation [up to 12 weeks]: Intensity of pigmentation was assessed with Dummett Oral Pigmentation Index (DOPI 1971). DOPI was scored as: Score 1: No clinical pigmentation (pink gingiva) Score 2: Mild clinical pigmentation (mild light brown color) Score 3: Moderate clinical pigmentation (medium brown or mixed pink and brown) Score 4: Heavy clinical pigmentation (deep brown or bluish black).
• Extension of pigmentation [up to 12 weeks]: Extension of pigmented area was assessed by, Hedin Melanin Index (HMI). It was scored as: Degree 1: Isolated-only 1 or 2 pigmented interdental papillae Degree 2: Numerous pigmented interdental papillae Degree 3: Short continuous ribbons Degree 4: Long continuous ribbon

Sex: All

Inclusion Criteria:

* Patients of both sexes diagnosed clinically with physiologic gingival pigmentation.
* Pigmentation extending from canine to canine in either upper or lower arch.

Exclusion Criteria:

* Smokers.
* Patients with uncontrolled metabolic disease.
* Immuno-compromised patients.
* Patients with renal disease.
* Patients having coagulation disorders.
* Pregnant and lactating women.
* Evidence about the relation of pigmentation with malignancies.
* History of previous treatment of gingival pigmentation.

• Souzy K Anwar, PhD, Principal investigator, Alexandria University
• Yasmine Y Gaweesh, PhD, Study director, Alexandria University
• Nourhan M Aly, MSc, Study director, Alexandria University
• Gillan I El-Kimary, PhD, Study chair, Alexandria University