The study is a randomized controlled clinical trial comparing the use of microneedling with vitamin C against injecting vitamin C for depigmentation in physiological gingival melanin hyperpigmentation in a group of patients attending the outpatient clinic of the department of Oral Medicine and Periodontology-Cairo University.
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Surface area of pigmentation
Timeframe: Measured at baseline
Surface area of pigmentation
Timeframe: Measured at 3 months after the intervention.